diff --git a/plugins/woocommerce-blocks/src/RestApi/Controllers/Products.php b/plugins/woocommerce-blocks/src/RestApi/Controllers/Products.php
index ff78c4ff923..95e591b2a4d 100644
--- a/plugins/woocommerce-blocks/src/RestApi/Controllers/Products.php
+++ b/plugins/woocommerce-blocks/src/RestApi/Controllers/Products.php
@@ -219,7 +219,7 @@ class Products extends WC_REST_Products_Controller {
 			'has_options'    => $product->has_options(),
 			'is_purchasable' => $product->is_purchasable(),
 			'is_in_stock'    => $product->is_in_stock(),
-			'add_to_cart'    => [
+			'add_to_cart'    => (object) [
 				'text'        => $product->add_to_cart_text(),
 				'description' => $product->add_to_cart_description(),
 			],
diff --git a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Controllers/ProductCollectionData.php b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Controllers/ProductCollectionData.php
index abcef4ceb18..256680228c9 100644
--- a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Controllers/ProductCollectionData.php
+++ b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Controllers/ProductCollectionData.php
@@ -140,7 +140,7 @@ class ProductCollectionData extends RestController {
 					$counts = $filters->get_attribute_counts( $filter_request, [ $taxonomy ] );
 
 					foreach ( $counts as $key => $value ) {
-						$data['attribute_counts'][] = [
+						$data['attribute_counts'][] = (object) [
 							'term'  => $key,
 							'count' => $value,
 						];
@@ -152,7 +152,7 @@ class ProductCollectionData extends RestController {
 				$counts = $filters->get_attribute_counts( $request, $taxonomy__and_queries );
 
 				foreach ( $counts as $key => $value ) {
-					$data['attribute_counts'][] = [
+					$data['attribute_counts'][] = (object) [
 						'term'  => $key,
 						'count' => $value,
 					];
@@ -166,7 +166,7 @@ class ProductCollectionData extends RestController {
 			$data['rating_counts'] = [];
 
 			foreach ( $counts as $key => $value ) {
-				$data['rating_counts'][] = [
+				$data['rating_counts'][] = (object) [
 					'rating' => $key,
 					'count'  => $value,
 				];
diff --git a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartCouponSchema.php b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartCouponSchema.php
index 51e33246c88..5d2db72193d 100644
--- a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartCouponSchema.php
+++ b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartCouponSchema.php
@@ -90,7 +90,7 @@ class CartCouponSchema extends AbstractSchema {
 		$total_discount_taxes = $cart->get_coupon_discount_tax_totals();
 		return [
 			'code'   => $coupon_code,
-			'totals' => array_merge(
+			'totals' => (object) array_merge(
 				$this->get_store_currency_response(),
 				[
 					'total_discount'     => $this->prepare_money_response( isset( $total_discounts[ $coupon_code ] ) ? $total_discounts[ $coupon_code ] : 0, wc_get_price_decimals() ),
diff --git a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartItemSchema.php b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartItemSchema.php
index 23866fd9c30..055d584ac5f 100644
--- a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartItemSchema.php
+++ b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartItemSchema.php
@@ -89,30 +89,42 @@ class CartItemSchema extends AbstractSchema {
 				'items'       => [
 					'type'       => 'object',
 					'properties' => [
-						'id'   => [
+						'id'        => [
 							'description' => __( 'Image ID.', 'woo-gutenberg-products-block' ),
 							'type'        => 'integer',
 							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
 						],
-						'src'  => [
-							'description' => __( 'Image URL.', 'woo-gutenberg-products-block' ),
+						'src'       => [
+							'description' => __( 'Full size image URL.', 'woo-gutenberg-products-block' ),
 							'type'        => 'string',
 							'format'      => 'uri',
 							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
 						],
-						'name' => [
+						'thumbnail' => [
+							'description' => __( 'Thumbnail URL.', 'woo-gutenberg-products-block' ),
+							'type'        => 'string',
+							'format'      => 'uri',
+							'context'     => [ 'view', 'edit' ],
+						],
+						'srcset'    => [
+							'description' => __( 'Thumbnail srcset for responsive images.', 'woo-gutenberg-products-block' ),
+							'type'        => 'string',
+							'context'     => [ 'view', 'edit' ],
+						],
+						'sizes'     => [
+							'description' => __( 'Thumbnail sizes for responsive images.', 'woo-gutenberg-products-block' ),
+							'type'        => 'string',
+							'context'     => [ 'view', 'edit' ],
+						],
+						'name'      => [
 							'description' => __( 'Image name.', 'woo-gutenberg-products-block' ),
 							'type'        => 'string',
 							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
 						],
-						'alt'  => [
+						'alt'       => [
 							'description' => __( 'Image alternative text.', 'woo-gutenberg-products-block' ),
 							'type'        => 'string',
 							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
 						],
 					],
 				],
@@ -205,12 +217,12 @@ class CartItemSchema extends AbstractSchema {
 			'id'                => $product->get_id(),
 			'quantity'          => wc_stock_amount( $cart_item['quantity'] ),
 			'name'              => $product->get_title(),
-			'short_description' => $short_description,
 			'sku'               => $product->get_sku(),
+			'short_description' => $short_description,
 			'permalink'         => $product->get_permalink(),
 			'images'            => ( new ProductImages() )->images_to_array( $product ),
 			'variation'         => $this->format_variation_data( $cart_item['variation'], $product ),
-			'totals'            => array_merge(
+			'totals'            => (object) array_merge(
 				$this->get_store_currency_response(),
 				[
 					'line_subtotal'     => $this->prepare_money_response( $cart_item['line_subtotal'], wc_get_price_decimals() ),
@@ -248,7 +260,10 @@ class CartItemSchema extends AbstractSchema {
 				$label = wc_attribute_label( str_replace( 'attribute_', '', $name ), $product );
 			}
 
-			$return[ $label ] = $value;
+			$return[] = [
+				'attribute' => $label,
+				'value'     => $value,
+			];
 		}
 
 		return $return;
diff --git a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartSchema.php b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartSchema.php
index 4c45392262d..e6695da4da8 100644
--- a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartSchema.php
+++ b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartSchema.php
@@ -57,7 +57,7 @@ class CartSchema extends AbstractSchema {
 			],
 			'items_weight'   => [
 				'description' => __( 'Total weight (in grams) of all products in the cart.', 'woo-gutenberg-products-block' ),
-				'type'        => 'string',
+				'type'        => 'number',
 				'context'     => [ 'view', 'edit' ],
 				'readonly'    => true,
 			],
@@ -179,7 +179,7 @@ class CartSchema extends AbstractSchema {
 			'items_count'    => $cart->get_cart_contents_count(),
 			'items_weight'   => wc_get_weight( $cart->get_cart_contents_weight(), 'g' ),
 			'needs_shipping' => $cart->needs_shipping(),
-			'totals'         => array_merge(
+			'totals'         => (object) array_merge(
 				$this->get_store_currency_response(),
 				[
 					'total_items'        => $this->prepare_money_response( $cart->get_subtotal(), wc_get_price_decimals() ),
diff --git a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartShippingRateSchema.php b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartShippingRateSchema.php
index 7b4b4b24556..f68cfadeeb1 100644
--- a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartShippingRateSchema.php
+++ b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CartShippingRateSchema.php
@@ -122,7 +122,7 @@ class CartShippingRateSchema extends AbstractSchema {
 			],
 			'price'         => [
 				'description' => __( 'Price of this shipping rate.', 'woo-gutenberg-products-block' ),
-				'type'        => 'boolean',
+				'type'        => 'string',
 				'context'     => [ 'view', 'edit' ],
 				'readonly'    => true,
 			],
@@ -177,7 +177,7 @@ class CartShippingRateSchema extends AbstractSchema {
 	 */
 	public function get_item_response( $package ) {
 		return [
-			'destination'    => [
+			'destination'    => (object) [
 				'address_1' => $package['destination']['address_1'],
 				'address_2' => $package['destination']['address_2'],
 				'city'      => $package['destination']['city'],
diff --git a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CustomerSchema.php b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CustomerSchema.php
index 1b0bed56376..ecde37a4dc3 100644
--- a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CustomerSchema.php
+++ b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/CustomerSchema.php
@@ -166,7 +166,7 @@ class CustomerSchema extends AbstractSchema {
 	public function get_item_response( $object ) {
 		return [
 			'id'               => $object->get_id(),
-			'billing_address'  => [
+			'billing_address'  => (object) [
 				'first_name' => $object->get_billing_first_name(),
 				'last_name'  => $object->get_billing_last_name(),
 				'company'    => $object->get_billing_company(),
@@ -179,7 +179,7 @@ class CustomerSchema extends AbstractSchema {
 				'email'      => $object->get_billing_email(),
 				'phone'      => $object->get_billing_phone(),
 			],
-			'shipping_address' => [
+			'shipping_address' => (object) [
 				'first_name' => $object->get_shipping_first_name(),
 				'last_name'  => $object->get_shipping_last_name(),
 				'company'    => $object->get_shipping_company(),
diff --git a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/OrderCouponSchema.php b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/OrderCouponSchema.php
new file mode 100644
index 00000000000..f5330554ee6
--- /dev/null
+++ b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/OrderCouponSchema.php
@@ -0,0 +1,80 @@
+<?php
+/**
+ * Order Coupon Schema.
+ *
+ * @package WooCommerce/Blocks
+ */
+
+namespace Automattic\WooCommerce\Blocks\RestApi\StoreApi\Schemas;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * OrderCouponSchema class.
+ */
+class OrderCouponSchema extends AbstractSchema {
+	/**
+	 * The schema item name.
+	 *
+	 * @var string
+	 */
+	protected $title = 'order_coupon';
+
+	/**
+	 * Cart schema properties.
+	 *
+	 * @return array
+	 */
+	protected function get_properties() {
+		return [
+			'code'   => [
+				'description' => __( 'The coupons unique code.', 'woo-gutenberg-products-block' ),
+				'type'        => 'string',
+				'context'     => [ 'view', 'edit' ],
+				'readonly'    => true,
+			],
+			'totals' => [
+				'description' => __( 'Total amounts provided using the smallest unit of the currency.', 'woo-gutenberg-products-block' ),
+				'type'        => 'object',
+				'context'     => [ 'view', 'edit' ],
+				'readonly'    => true,
+				'properties'  => array_merge(
+					$this->get_store_currency_properties(),
+					[
+						'total_discount'     => [
+							'description' => __( 'Total discount applied by this coupon.', 'woo-gutenberg-products-block' ),
+							'type'        => 'string',
+							'context'     => [ 'view', 'edit' ],
+							'readonly'    => true,
+						],
+						'total_discount_tax' => [
+							'description' => __( 'Total tax removed due to discount applied by this coupon.', 'woo-gutenberg-products-block' ),
+							'type'        => 'string',
+							'context'     => [ 'view', 'edit' ],
+							'readonly'    => true,
+						],
+					]
+				),
+			],
+		];
+	}
+
+	/**
+	 * Convert an order coupon to an object suitable for the response.
+	 *
+	 * @param \WC_Order_Item_Coupon $coupon Order coupon array.
+	 * @return array
+	 */
+	public function get_item_response( \WC_Order_Item_Coupon $coupon ) {
+		return [
+			'code'   => $coupon->get_code(),
+			'totals' => (object) array_merge(
+				$this->get_store_currency_response(),
+				[
+					'total_discount'     => $this->prepare_money_response( $coupon->get_discount(), wc_get_price_decimals() ),
+					'total_discount_tax' => $this->prepare_money_response( $coupon->get_discount_tax(), wc_get_price_decimals(), PHP_ROUND_HALF_DOWN ),
+				]
+			),
+		];
+	}
+}
diff --git a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/OrderItemSchema.php b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/OrderItemSchema.php
index 3312316d007..e333ebc0dc7 100644
--- a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/OrderItemSchema.php
+++ b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/OrderItemSchema.php
@@ -50,19 +50,19 @@ class OrderItemSchema extends AbstractSchema {
 			],
 			'name'      => [
 				'description' => __( 'Product name.', 'woo-gutenberg-products-block' ),
-				'type'        => 'string',
+				'type'        => [ 'string', 'null' ],
 				'context'     => [ 'view', 'edit' ],
 				'readonly'    => true,
 			],
 			'sku'       => [
 				'description' => __( 'Stock keeping unit, if applicable.', 'woo-gutenberg-products-block' ),
-				'type'        => 'string',
+				'type'        => [ 'string', 'null' ],
 				'context'     => [ 'view', 'edit' ],
 				'readonly'    => true,
 			],
 			'permalink' => [
 				'description' => __( 'Product URL.', 'woo-gutenberg-products-block' ),
-				'type'        => 'string',
+				'type'        => [ 'string', 'null' ],
 				'format'      => 'uri',
 				'context'     => [ 'view', 'edit' ],
 				'readonly'    => true,
@@ -75,30 +75,42 @@ class OrderItemSchema extends AbstractSchema {
 				'items'       => [
 					'type'       => 'object',
 					'properties' => [
-						'id'   => [
+						'id'        => [
 							'description' => __( 'Image ID.', 'woo-gutenberg-products-block' ),
 							'type'        => 'integer',
 							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
 						],
-						'src'  => [
-							'description' => __( 'Image URL.', 'woo-gutenberg-products-block' ),
+						'src'       => [
+							'description' => __( 'Full size image URL.', 'woo-gutenberg-products-block' ),
 							'type'        => 'string',
 							'format'      => 'uri',
 							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
 						],
-						'name' => [
+						'thumbnail' => [
+							'description' => __( 'Thumbnail URL.', 'woo-gutenberg-products-block' ),
+							'type'        => 'string',
+							'format'      => 'uri',
+							'context'     => [ 'view', 'edit' ],
+						],
+						'srcset'    => [
+							'description' => __( 'Thumbnail srcset for responsive images.', 'woo-gutenberg-products-block' ),
+							'type'        => 'string',
+							'context'     => [ 'view', 'edit' ],
+						],
+						'sizes'     => [
+							'description' => __( 'Thumbnail sizes for responsive images.', 'woo-gutenberg-products-block' ),
+							'type'        => 'string',
+							'context'     => [ 'view', 'edit' ],
+						],
+						'name'      => [
 							'description' => __( 'Image name.', 'woo-gutenberg-products-block' ),
 							'type'        => 'string',
 							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
 						],
-						'alt'  => [
+						'alt'       => [
 							'description' => __( 'Image alternative text.', 'woo-gutenberg-products-block' ),
 							'type'        => 'string',
 							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
 						],
 					],
 				],
@@ -173,9 +185,7 @@ class OrderItemSchema extends AbstractSchema {
 	}
 
 	/**
-	 * Convert a WooCommerce cart item to an object suitable for the response.
-	 *
-	 * @todo Variation is stored to meta - how can we gather for response?
+	 * Convert an order item to an object suitable for the response.
 	 *
 	 * @param \WC_Order_Item_Product $line_item Order line item array.
 	 * @return array
@@ -190,9 +200,9 @@ class OrderItemSchema extends AbstractSchema {
 			'name'      => $has_product ? $product->get_title() : null,
 			'sku'       => $has_product ? $product->get_sku() : null,
 			'permalink' => $has_product ? $product->get_permalink() : null,
-			'images'    => $has_product ? ( new ProductImages() )->images_to_array( $product ) : null,
+			'images'    => $has_product ? ( new ProductImages() )->images_to_array( $product ) : [],
 			'variation' => $has_product ? $this->format_variation_data( $line_item, $product ) : [],
-			'totals'    => array_merge(
+			'totals'    => (object) array_merge(
 				$this->get_store_currency_response(),
 				[
 					'line_subtotal'     => $this->prepare_money_response( $line_item->get_subtotal(), wc_get_price_decimals() ),
@@ -239,7 +249,10 @@ class OrderItemSchema extends AbstractSchema {
 				$label = wc_attribute_label( $name, $product );
 			}
 
-			$return[ $label ] = $value;
+			$return[] = [
+				'attribute' => $label,
+				'value'     => $value,
+			];
 		}
 
 		return $return;
diff --git a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/OrderSchema.php b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/OrderSchema.php
index 93eee3fe921..4bf681552b2 100644
--- a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/OrderSchema.php
+++ b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/OrderSchema.php
@@ -97,25 +97,25 @@ class OrderSchema extends AbstractSchema {
 					],
 					'date_paid'          => [
 						'description' => __( "The date the order was paid, in the site's timezone.", 'woo-gutenberg-products-block' ),
-						'type'        => 'date-time',
+						'type'        => [ 'date-time', 'null' ],
 						'context'     => [ 'view', 'edit' ],
 						'readonly'    => true,
 					],
 					'date_paid_gmt'      => [
 						'description' => __( 'The date the order was paid, as GMT.', 'woo-gutenberg-products-block' ),
-						'type'        => 'date-time',
+						'type'        => [ 'date-time', 'null' ],
 						'context'     => [ 'view', 'edit' ],
 						'readonly'    => true,
 					],
 					'date_completed'     => [
 						'description' => __( "The date the order was completed, in the site's timezone.", 'woo-gutenberg-products-block' ),
-						'type'        => 'date-time',
+						'type'        => [ 'date-time', 'null' ],
 						'context'     => [ 'view', 'edit' ],
 						'readonly'    => true,
 					],
 					'date_completed_gmt' => [
 						'description' => __( 'The date the order was completed, as GMT.', 'woo-gutenberg-products-block' ),
-						'type'        => 'date-time',
+						'type'        => [ 'date-time', 'null' ],
 						'context'     => [ 'view', 'edit' ],
 						'readonly'    => true,
 					],
@@ -268,7 +268,7 @@ class OrderSchema extends AbstractSchema {
 				],
 			],
 			'coupons'            => [
-				'description' => __( 'List of applied cart coupons.', 'woo-gutenberg-products-block' ),
+				'description' => __( 'List of applied coupons.', 'woo-gutenberg-products-block' ),
 				'type'        => 'array',
 				'context'     => [ 'view', 'edit' ],
 				'readonly'    => true,
@@ -287,76 +287,6 @@ class OrderSchema extends AbstractSchema {
 					'properties' => $this->force_schema_readonly( ( new OrderItemSchema() )->get_properties() ),
 				],
 			],
-			'shipping_lines'     => [
-				'description' => __( 'Shipping lines data.', 'woo-gutenberg-products-block' ),
-				'type'        => 'array',
-				'context'     => [ 'view', 'edit' ],
-				'readonly'    => true,
-				'items'       => [
-					'type'       => 'object',
-					'properties' => [
-						'id'           => [
-							'description' => __( 'Item ID.', 'woo-gutenberg-products-block' ),
-							'type'        => 'integer',
-							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
-						],
-						'method_title' => [
-							'description' => __( 'Shipping method name.', 'woo-gutenberg-products-block' ),
-							'type'        => 'mixed',
-							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
-						],
-						'method_id'    => [
-							'description' => __( 'Shipping method ID.', 'woo-gutenberg-products-block' ),
-							'type'        => 'mixed',
-							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
-						],
-						'instance_id'  => [
-							'description' => __( 'Shipping instance ID.', 'woo-gutenberg-products-block' ),
-							'type'        => 'string',
-							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
-						],
-						'total'        => [
-							'description' => __( 'Line total (after discounts).', 'woo-gutenberg-products-block' ),
-							'type'        => 'string',
-							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
-						],
-						'total_tax'    => [
-							'description' => __( 'Line total tax (after discounts).', 'woo-gutenberg-products-block' ),
-							'type'        => 'string',
-							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
-						],
-						'taxes'        => [
-							'description' => __( 'Line taxes.', 'woo-gutenberg-products-block' ),
-							'type'        => 'array',
-							'context'     => [ 'view', 'edit' ],
-							'readonly'    => true,
-							'items'       => [
-								'type'       => 'object',
-								'properties' => [
-									'id'    => [
-										'description' => __( 'Tax rate ID.', 'woo-gutenberg-products-block' ),
-										'type'        => 'integer',
-										'context'     => [ 'view', 'edit' ],
-										'readonly'    => true,
-									],
-									'total' => [
-										'description' => __( 'Tax total.', 'woo-gutenberg-products-block' ),
-										'type'        => 'string',
-										'context'     => [ 'view', 'edit' ],
-										'readonly'    => true,
-									],
-								],
-							],
-						],
-					],
-				],
-			],
 			'totals'             => [
 				'description' => __( 'Total amounts provided using the smallest unit of the currency.', 'woo-gutenberg-products-block' ),
 				'type'        => 'object',
@@ -461,8 +391,8 @@ class OrderSchema extends AbstractSchema {
 	 * @return array
 	 */
 	public function get_item_response( \WC_Order $order ) {
-		$order_item_schema = new OrderItemSchema();
-
+		$order_item_schema   = new OrderItemSchema();
+		$order_coupon_schema = new OrderCouponSchema();
 		return [
 			'id'                 => $order->get_id(),
 			'number'             => $order->get_order_number(),
@@ -470,14 +400,14 @@ class OrderSchema extends AbstractSchema {
 			'order_key'          => $order->get_order_key(),
 			'created_via'        => $order->get_created_via(),
 			'prices_include_tax' => $order->get_prices_include_tax(),
-			'events'             => $this->get_events( $order ),
-			'customer'           => [
+			'events'             => (object) $this->get_events( $order ),
+			'customer'           => (object) [
 				'customer_id'         => $order->get_customer_id(),
 				'customer_ip_address' => $order->get_customer_ip_address(),
 				'customer_user_agent' => $order->get_customer_user_agent(),
 			],
 			'customer_note'      => $order->get_customer_note(),
-			'billing_address'    => [
+			'billing_address'    => (object) [
 				'first_name' => $order->get_billing_first_name(),
 				'last_name'  => $order->get_billing_last_name(),
 				'company'    => $order->get_billing_company(),
@@ -490,7 +420,7 @@ class OrderSchema extends AbstractSchema {
 				'email'      => $order->get_billing_email(),
 				'phone'      => $order->get_billing_phone(),
 			],
-			'shipping_address'   => [
+			'shipping_address'   => (object) [
 				'first_name' => $order->get_shipping_first_name(),
 				'last_name'  => $order->get_shipping_last_name(),
 				'company'    => $order->get_shipping_company(),
@@ -501,8 +431,9 @@ class OrderSchema extends AbstractSchema {
 				'postcode'   => $order->get_shipping_postcode(),
 				'country'    => $order->get_shipping_country(),
 			],
+			'coupons'            => array_values( array_map( [ $order_coupon_schema, 'get_item_response' ], $order->get_items( 'coupon' ) ) ),
 			'items'              => array_values( array_map( [ $order_item_schema, 'get_item_response' ], $order->get_items( 'line_item' ) ) ),
-			'totals'             => array_merge(
+			'totals'             => (object) array_merge(
 				$this->get_store_currency_response(),
 				[
 					'total_items'        => $this->prepare_money_response( $order->get_subtotal(), wc_get_price_decimals() ),
diff --git a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/ProductCollectionDataSchema.php b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/ProductCollectionDataSchema.php
index 3a8fef1ecab..eddc17137c3 100644
--- a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/ProductCollectionDataSchema.php
+++ b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/ProductCollectionDataSchema.php
@@ -31,7 +31,7 @@ class ProductCollectionDataSchema extends AbstractSchema {
 		return [
 			'price_range'      => [
 				'description' => __( 'Min and max prices found in collection of products, provided using the smallest unit of the currency.', 'woo-gutenberg-products-block' ),
-				'type'        => 'object',
+				'type'        => [ 'object', 'null' ],
 				'context'     => [ 'view', 'edit' ],
 				'readonly'    => true,
 				'properties'  => array_merge(
@@ -54,7 +54,7 @@ class ProductCollectionDataSchema extends AbstractSchema {
 			],
 			'attribute_counts' => [
 				'description' => __( 'Returns number of products within attribute terms.', 'woo-gutenberg-products-block' ),
-				'type'        => 'array',
+				'type'        => [ 'array', 'null' ],
 				'context'     => [ 'view', 'edit' ],
 				'readonly'    => true,
 				'items'       => [
@@ -77,7 +77,7 @@ class ProductCollectionDataSchema extends AbstractSchema {
 			],
 			'rating_counts'    => [
 				'description' => __( 'Returns number of products with each average rating.', 'woo-gutenberg-products-block' ),
-				'type'        => 'array',
+				'type'        => [ 'array', 'null' ],
 				'context'     => [ 'view', 'edit' ],
 				'readonly'    => true,
 				'items'       => [
@@ -109,7 +109,7 @@ class ProductCollectionDataSchema extends AbstractSchema {
 	 */
 	public function get_item_response( $data ) {
 		return [
-			'price_range'      => ! is_null( $data['min_price'] ) && ! is_null( $data['max_price'] ) ? array_merge(
+			'price_range'      => ! is_null( $data['min_price'] ) && ! is_null( $data['max_price'] ) ? (object) array_merge(
 				$this->get_store_currency_response(),
 				[
 					'min_price' => $this->prepare_money_response( $data['min_price'], wc_get_price_decimals() ),
diff --git a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/ProductSchema.php b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/ProductSchema.php
index 0f826a55e93..1f199a64e5f 100644
--- a/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/ProductSchema.php
+++ b/plugins/woocommerce-blocks/src/RestApi/StoreApi/Schemas/ProductSchema.php
@@ -98,7 +98,7 @@ class ProductSchema extends AbstractSchema {
 						],
 						'price_range'   => [
 							'description' => __( 'Price range, if applicable.', 'woo-gutenberg-products-block' ),
-							'type'        => 'object',
+							'type'        => [ 'object', 'null' ],
 							'context'     => [ 'view', 'edit' ],
 							'readonly'    => true,
 							'properties'  => [
@@ -138,23 +138,39 @@ class ProductSchema extends AbstractSchema {
 				'items'       => [
 					'type'       => 'object',
 					'properties' => [
-						'id'   => [
+						'id'        => [
 							'description' => __( 'Image ID.', 'woo-gutenberg-products-block' ),
 							'type'        => 'integer',
 							'context'     => [ 'view', 'edit' ],
 						],
-						'src'  => [
-							'description' => __( 'Image URL.', 'woo-gutenberg-products-block' ),
+						'src'       => [
+							'description' => __( 'Full size image URL.', 'woo-gutenberg-products-block' ),
 							'type'        => 'string',
 							'format'      => 'uri',
 							'context'     => [ 'view', 'edit' ],
 						],
-						'name' => [
+						'thumbnail' => [
+							'description' => __( 'Thumbnail URL.', 'woo-gutenberg-products-block' ),
+							'type'        => 'string',
+							'format'      => 'uri',
+							'context'     => [ 'view', 'edit' ],
+						],
+						'srcset'    => [
+							'description' => __( 'Thumbnail srcset for responsive images.', 'woo-gutenberg-products-block' ),
+							'type'        => 'string',
+							'context'     => [ 'view', 'edit' ],
+						],
+						'sizes'     => [
+							'description' => __( 'Thumbnail sizes for responsive images.', 'woo-gutenberg-products-block' ),
+							'type'        => 'string',
+							'context'     => [ 'view', 'edit' ],
+						],
+						'name'      => [
 							'description' => __( 'Image name.', 'woo-gutenberg-products-block' ),
 							'type'        => 'string',
 							'context'     => [ 'view', 'edit' ],
 						],
-						'alt'  => [
+						'alt'       => [
 							'description' => __( 'Image alternative text.', 'woo-gutenberg-products-block' ),
 							'type'        => 'string',
 							'context'     => [ 'view', 'edit' ],
@@ -182,7 +198,7 @@ class ProductSchema extends AbstractSchema {
 			],
 			'low_stock_remaining' => [
 				'description' => __( 'Quantity left in stock if stock is low, or null if not applicable.', 'woo-gutenberg-products-block' ),
-				'type'        => 'integer',
+				'type'        => [ 'integer', 'null' ],
 				'context'     => [ 'view', 'edit' ],
 				'readonly'    => true,
 			],
@@ -224,7 +240,7 @@ class ProductSchema extends AbstractSchema {
 			'sku'                 => $product->get_sku(),
 			'description'         => apply_filters( 'woocommerce_short_description', $product->get_short_description() ? $product->get_short_description() : wc_trim_string( $product->get_description(), 400 ) ),
 			'on_sale'             => $product->is_on_sale(),
-			'prices'              => $this->get_prices( $product ),
+			'prices'              => (object) $this->get_prices( $product ),
 			'average_rating'      => $product->get_average_rating(),
 			'review_count'        => $product->get_review_count(),
 			'images'              => ( new ProductImages() )->images_to_array( $product ),
@@ -232,7 +248,7 @@ class ProductSchema extends AbstractSchema {
 			'is_purchasable'      => $product->is_purchasable(),
 			'is_in_stock'         => $product->is_in_stock(),
 			'low_stock_remaining' => $this->get_low_stock_remaining( $product ),
-			'add_to_cart'         => [
+			'add_to_cart'         => (object) [
 				'text'        => $product->add_to_cart_text(),
 				'description' => $product->add_to_cart_description(),
 			],
@@ -274,7 +290,7 @@ class ProductSchema extends AbstractSchema {
 	 * Get price range from certain product types.
 	 *
 	 * @param \WC_Product $product Product instance.
-	 * @return array|null
+	 * @return object|null
 	 */
 	protected function get_price_range( \WC_Product $product ) {
 		$tax_display_mode = get_option( 'woocommerce_tax_display_shop' );
@@ -283,7 +299,7 @@ class ProductSchema extends AbstractSchema {
 			$prices = $product->get_variation_prices( true );
 
 			if ( min( $prices['price'] ) !== max( $prices['price'] ) ) {
-				return [
+				return (object) [
 					'min_amount' => $this->prepare_money_response( min( $prices['price'] ), wc_get_price_decimals() ),
 					'max_amount' => $this->prepare_money_response( max( $prices['price'] ), wc_get_price_decimals() ),
 				];
@@ -301,7 +317,7 @@ class ProductSchema extends AbstractSchema {
 			}
 
 			if ( ! empty( $child_prices ) ) {
-				return [
+				return (object) [
 					'min_amount' => $this->prepare_money_response( min( $child_prices ), wc_get_price_decimals() ),
 					'max_amount' => $this->prepare_money_response( max( $child_prices ), wc_get_price_decimals() ),
 				];
diff --git a/plugins/woocommerce-blocks/src/RestApi/Utilities/ProductImages.php b/plugins/woocommerce-blocks/src/RestApi/Utilities/ProductImages.php
index d469a640a5c..64ab1ce416f 100644
--- a/plugins/woocommerce-blocks/src/RestApi/Utilities/ProductImages.php
+++ b/plugins/woocommerce-blocks/src/RestApi/Utilities/ProductImages.php
@@ -43,11 +43,11 @@ class ProductImages {
 			$thumbnail = wp_get_attachment_image_src( $attachment_id, 'woocommerce_thumbnail' );
 
 			$images[] = array(
-				'id'        => $attachment_id,
+				'id'        => (int) $attachment_id,
 				'src'       => current( $attachment ),
 				'thumbnail' => current( $thumbnail ),
-				'srcset'    => wp_get_attachment_image_srcset( $attachment_id, 'full' ),
-				'sizes'     => wp_get_attachment_image_sizes( $attachment_id, 'full' ),
+				'srcset'    => (string) wp_get_attachment_image_srcset( $attachment_id, 'full' ),
+				'sizes'     => (string) wp_get_attachment_image_sizes( $attachment_id, 'full' ),
 				'name'      => get_the_title( $attachment_id ),
 				'alt'       => get_post_meta( $attachment_id, '_wp_attachment_image_alt', true ),
 			);
diff --git a/plugins/woocommerce-blocks/tests/php/Helpers/TestValidateSchema.php b/plugins/woocommerce-blocks/tests/php/Helpers/TestValidateSchema.php
new file mode 100644
index 00000000000..fa7c91e26ad
--- /dev/null
+++ b/plugins/woocommerce-blocks/tests/php/Helpers/TestValidateSchema.php
@@ -0,0 +1,132 @@
+<?php
+/**
+ * Ensures the helper works.
+ *
+ * @package WooCommerce\Blocks\Tests
+ */
+
+namespace Automattic\WooCommerce\Blocks\Tests\Helpers;
+
+require_once 'ValidateSchema.php';
+
+use \WC_REST_Unit_Test_Case as TestCase;
+
+/**
+ * Test Validate schema.
+ */
+class TestValidateSchema extends TestCase {
+	/**
+	 * ValidateSchema instance.
+	 *
+	 * @var ValidateSchema
+	 */
+	protected $validate;
+
+	/**
+	 * Setup schema.
+	 */
+	public function setUp() {
+		$this->validate = new ValidateSchema(
+			[
+				'properties' => [
+					'test_number'          => [
+						'type' => 'number',
+					],
+					'test_string'          => [
+						'type' => 'string',
+					],
+					'test_integer'         => [
+						'type' => 'integer',
+					],
+					'test_object'          => [
+						'type'       => 'object',
+						'properties' => [
+							'property_1' => [
+								'type' => 'string',
+							],
+							'property_2' => [
+								'type' => 'string',
+							],
+						],
+					],
+					'test_array'           => [
+						'type'  => 'array',
+						'items' => [
+							'type'       => 'object',
+							'properties' => [
+								'property_1' => [
+									'type' => 'string',
+								],
+								'property_2' => [
+									'type' => 'string',
+								],
+							],
+						],
+					],
+					'test_integer_or_null' => [
+						'type' => [ 'null', 'integer' ],
+					],
+				],
+			]
+		);
+	}
+
+	/**
+	 * Validate an object.
+	 */
+	public function test_get_diff_from_valid_object() {
+		$test_object = (object) [
+			'test_number'          => 1.2,
+			'test_string'          => 'Hello',
+			'test_integer'         => 1,
+			'test_object'          => (object) [
+				'property_1' => 'Prop 1',
+				'property_2' => 'Prop 2',
+			],
+			'test_array'           => [
+				(object) [
+					'property_1' => 'Prop 1',
+					'property_2' => 'Prop 2',
+				],
+			],
+			'test_integer_or_null' => null,
+		];
+
+		$diff = $this->validate->get_diff_from_object( $test_object );
+		$this->assertEmpty( $diff, print_r( $diff, true ) );
+	}
+
+	/**
+	 * Validate an object.
+	 */
+	public function test_get_diff_from_invalid_object() {
+		$test_object = (object) [
+			'test_number'          => 'Invalid',
+			'test_string'          => 666,
+			'test_integer'         => 'Nope',
+			'test_object'          => (object) [
+				'property_1' => 1,
+				'property_2' => 2,
+			],
+			'test_array'           => [
+				(object) [
+					'property_1'  => 1,
+					'invalid_key' => 2,
+				],
+			],
+			'test_integer_or_null' => 'string',
+		];
+
+		$diff = $this->validate->get_diff_from_object( $test_object );
+
+		$this->assertContains( 'test_array:property_2', $diff['missing'], print_r( $diff['missing'], true ) );
+		$this->assertContains( 'test_array:invalid_key', $diff['no_schema'], print_r( $diff['no_schema'], true ) );
+
+		$this->assertContains( 'test_number (string, expected number)', $diff['invalid_type'], print_r( $diff['invalid_type'], true ) );
+		$this->assertContains( 'test_string (integer, expected string)', $diff['invalid_type'], print_r( $diff['invalid_type'], true ) );
+		$this->assertContains( 'test_integer (string, expected integer)', $diff['invalid_type'], print_r( $diff['invalid_type'], true ) );
+		$this->assertContains( 'test_number (string, expected number)', $diff['invalid_type'], print_r( $diff['invalid_type'], true ) );
+		$this->assertContains( 'test_array:property_1 (integer, expected string)', $diff['invalid_type'], print_r( $diff['invalid_type'], true ) );
+		$this->assertContains( 'test_integer_or_null (string, expected null, integer)', $diff['invalid_type'], print_r( $diff['invalid_type'], true ) );
+	}
+}
diff --git a/plugins/woocommerce-blocks/tests/php/Helpers/ValidateSchema.php b/plugins/woocommerce-blocks/tests/php/Helpers/ValidateSchema.php
new file mode 100644
index 00000000000..00e20a4855c
--- /dev/null
+++ b/plugins/woocommerce-blocks/tests/php/Helpers/ValidateSchema.php
@@ -0,0 +1,115 @@
+<?php
+/**
+ * Helper used to validate schema differences.
+ *
+ * @package WooCommerce\Blocks\Tests
+ */
+
+namespace Automattic\WooCommerce\Blocks\Tests\Helpers;
+
+/**
+ * Validate schema.
+ */
+class ValidateSchema {
+	/**
+	 * The schema.
+	 *
+	 * @var array
+	 */
+	protected $schema = [];
+
+	/**
+	 * Constructor passed schema object.
+	 *
+	 * @param array $schema API schema representation.
+	 */
+	public function __construct( $schema ) {
+		$this->schema = $schema;
+	}
+
+	/**
+	 * Validate properties and return diff.
+	 *
+	 * @param array|object $object Object to compare.
+	 * @param array        $schema Schema to find nested properties under.
+	 * @param string       $prefix Prefix to append to diff property names.
+	 * @return array
+	 */
+	public function get_diff_from_object( $object, $schema = null, $prefix = '' ) {
+		$missing      = [];
+		$invalid_type = [];
+		$no_schema    = [];
+
+		if ( is_null( $schema ) ) {
+			$schema = $this->schema['properties'];
+		}
+
+		if ( ! is_array( $object ) && ! is_object( $object ) ) {
+			return [];
+		}
+
+		$object          = (array) $object;
+		$no_schema_diffs = array_diff( array_keys( (array) $object ), array_keys( $schema ) );
+		foreach ( $no_schema_diffs as $no_schema_diff ) {
+			$no_schema[] = $prefix . $no_schema_diff;
+		}
+
+		foreach ( $schema as $property_name => $property_schema ) {
+			// Validate property is set in object. Avoids isset in case value is NULL.
+			if ( ( is_array( $object ) && ! array_key_exists( $property_name, $object ) ) || ( is_object( $object ) && ! property_exists( $object, $property_name ) ) ) {
+				$missing[] = $prefix . $property_name;
+				continue;
+			}
+
+			// Validate type.
+			$type = gettype( $object[ $property_name ] );
+			if ( $type && ! $this->validate_type( $type, $property_schema['type'] ) ) {
+				$expected       = is_array( $property_schema['type'] ) ? implode( ', ', $property_schema['type'] ) : $property_schema['type'];
+				$invalid_type[] = $prefix . $property_name . " ({$type}, expected {$expected})";
+				continue;
+			}
+
+			// Validate nested props.
+			if ( isset( $property_schema['items']['properties'] ) ) {
+				$nested_value = is_array( $object[ $property_name ] ) ? current( $object[ $property_name ] ) : $object[ $property_name ];
+
+				if ( $nested_value ) {
+					$diff         = $this->get_diff_from_object(
+						$nested_value,
+						$property_schema['items']['properties'],
+						$prefix . $property_name . ':'
+					);
+					$missing      = isset( $diff['missing'] ) ? array_merge( $missing, $diff['missing'] ) : $missing;
+					$invalid_type = isset( $diff['invalid_type'] ) ? array_merge( $invalid_type, $diff['invalid_type'] ) : $invalid_type;
+					$no_schema    = isset( $diff['no_schema'] ) ? array_merge( $no_schema, $diff['no_schema'] ) : $no_schema;
+				}
+			}
+		}
+
+		return array_filter(
+			[
+				'missing'      => array_values( array_filter( $missing ) ),
+				'invalid_type' => array_values( array_filter( $invalid_type ) ),
+				'no_schema'    => array_values( array_filter( $no_schema ) ),
+			]
+		);
+	}
+
+	/**
+	 * Validate type and return if it matches.
+	 *
+	 * @param string       $type Type to check.
+	 * @param string|array $expected Expected types.
+	 * @return boolean
+	 */
+	protected function validate_type( $type, $expected ) {
+		$type     = strtolower( $type );
+		$expected = is_array( $expected ) ? $expected : [ $expected ];
+
+		if ( in_array( 'number', $expected ) ) {
+			$expected = array_merge( $expected, [ 'double', 'float', 'integer' ] );
+		}
+
+		return in_array( $type, $expected, true );
+	}
+}
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/ProductAttributeTerms.php b/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/ProductAttributeTerms.php
index 8c23358dc76..d9af4fdcb38 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/ProductAttributeTerms.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/ProductAttributeTerms.php
@@ -59,11 +59,11 @@ class ProductAttributeTerms extends WC_REST_Unit_Test_Case {
 		wp_set_current_user( $this->user );
 		$request = new WP_REST_Request( 'GET', $this->endpoint . '/products/attributes/' . $this->attr_color['attribute_id'] . '/terms' );
 
-		$response       = $this->server->dispatch( $request );
-		$response_terms = $response->get_data();
+		$response = $this->server->dispatch( $request );
+		$data     = $response->get_data();
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 3, count( $response_terms ) );
-		$term = $response_terms[0];
+		$this->assertEquals( 3, count( $data ) );
+		$term = $data[0];
 		$this->assertArrayHasKey( 'attribute', $term );
 		$attribute = $term['attribute'];
 		$this->assertArrayHasKey( 'id', $attribute );
@@ -105,9 +105,9 @@ class ProductAttributeTerms extends WC_REST_Unit_Test_Case {
 		wp_set_current_user( $this->contributor );
 		$request = new WP_REST_Request( 'GET', $this->endpoint . '/products/attributes/' . $this->attr_size['attribute_id'] . '/terms' );
 
-		$response       = $this->server->dispatch( $request );
-		$response_terms = $response->get_data();
+		$response = $this->server->dispatch( $request );
+		$data     = $response->get_data();
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 4, count( $response_terms ) );
+		$this->assertEquals( 4, count( $data ) );
 	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/ProductAttributes.php b/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/ProductAttributes.php
index 96b7fd5e1ba..9cbe688fa34 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/ProductAttributes.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/ProductAttributes.php
@@ -59,11 +59,11 @@ class ProductAttributes extends WC_REST_Unit_Test_Case {
 		wp_set_current_user( $this->user );
 		$request = new WP_REST_Request( 'GET', $this->endpoint . '/products/attributes' );
 
-		$response            = $this->server->dispatch( $request );
-		$response_attributes = $response->get_data();
+		$response = $this->server->dispatch( $request );
+		$data     = $response->get_data();
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 2, count( $response_attributes ) );
-		$attribute = $response_attributes[0];
+		$this->assertEquals( 2, count( $data ) );
+		$attribute = $data[0];
 		$this->assertArrayHasKey( 'id', $attribute );
 		$this->assertArrayHasKey( 'name', $attribute );
 		$this->assertArrayHasKey( 'slug', $attribute );
@@ -104,10 +104,10 @@ class ProductAttributes extends WC_REST_Unit_Test_Case {
 		wp_set_current_user( $this->contributor );
 		$request = new WP_REST_Request( 'GET', $this->endpoint . '/products/attributes/' . $this->attr_size['attribute_id'] );
 
-		$response  = $this->server->dispatch( $request );
-		$attribute = $response->get_data();
+		$response = $this->server->dispatch( $request );
+		$data     = $response->get_data();
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( $this->attr_size['attribute_id'], $attribute['id'] );
-		$this->assertEquals( $this->attr_size['attribute_name'], $attribute['name'] );
+		$this->assertEquals( $this->attr_size['attribute_id'], $data['id'] );
+		$this->assertEquals( $this->attr_size['attribute_name'], $data['name'] );
 	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/ProductCategories.php b/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/ProductCategories.php
index 27c3c34ef6a..26ca7b51fac 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/ProductCategories.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/ProductCategories.php
@@ -79,10 +79,10 @@ class ProductCategories extends WC_REST_Unit_Test_Case {
 		wp_set_current_user( $this->user );
 		$request = new WP_REST_Request( 'GET', $this->endpoint . '/products/categories' );
 
-		$response   = $this->server->dispatch( $request );
-		$categories = $response->get_data();
+		$response = $this->server->dispatch( $request );
+		$data     = $response->get_data();
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 4, count( $categories ) ); // Three created and `uncategorized`.
+		$this->assertEquals( 4, count( $data ) ); // Three created and `uncategorized`.
 	}
 
 	/**
@@ -120,10 +120,10 @@ class ProductCategories extends WC_REST_Unit_Test_Case {
 		$request = new WP_REST_Request( 'GET', $this->endpoint . '/products/categories/' . $this->categories['parent']['term_id'] );
 
 		$response = $this->server->dispatch( $request );
-		$category = $response->get_data();
+		$data     = $response->get_data();
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( $category['name'], 'Parent Category' );
-		$this->assertEquals( $category['parent'], 0 );
-		$this->assertEquals( $category['count'], 2 );
+		$this->assertEquals( $data['name'], 'Parent Category' );
+		$this->assertEquals( $data['parent'], 0 );
+		$this->assertEquals( $data['count'], 2 );
 	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/Products.php b/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/Products.php
index e092653ca02..10be7fb0a86 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/Products.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/Controllers/Products.php
@@ -106,11 +106,10 @@ class Products extends WC_REST_Unit_Test_Case {
 		sleep( 1 ); // So both products have different timestamps.
 		$product  = ProductHelper::create_simple_product();
 		$response = $this->server->dispatch( new WP_REST_Request( 'GET', '/wc/blocks/products' ) );
-		$products = $response->get_data();
+		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-
-		$this->assertEquals( 6, count( $products ) );
+		$this->assertEquals( 6, count( $data ) );
 	}
 
 	/**
@@ -160,13 +159,13 @@ class Products extends WC_REST_Unit_Test_Case {
 		$request->set_param( 'orderby', 'price' );
 		$request->set_param( 'order', 'asc' );
 		$response = $this->server->dispatch( $request );
-		$products = $response->get_data();
+		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 6, count( $products ) );
+		$this->assertEquals( 6, count( $data ) );
 
-		$this->assertEquals( 'Dummy Product', $products[1]['name'] );
-		$this->assertEquals( '10', $products[1]['price'] );
+		$this->assertEquals( 'Dummy Product', $data[1]['name'] );
+		$this->assertEquals( '10', $data[1]['price'] );
 	}
 
 	/**
@@ -202,11 +201,11 @@ class Products extends WC_REST_Unit_Test_Case {
 		$request      = new WP_REST_REQUEST( 'GET', '/wc/blocks/products' );
 		$request->set_query_params( $query_params );
 		$response = $this->server->dispatch( $request );
-		$products = $response->get_data();
+		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 5, count( $products ) );
-		$this->assertEquals( 'Visible Product', $products[0]['name'] );
+		$this->assertEquals( 5, count( $data ) );
+		$this->assertEquals( 'Visible Product', $data[0]['name'] );
 
 		$query_params = array(
 			'catalog_visibility' => 'catalog',
@@ -216,11 +215,11 @@ class Products extends WC_REST_Unit_Test_Case {
 		$request      = new WP_REST_REQUEST( 'GET', '/wc/blocks/products' );
 		$request->set_query_params( $query_params );
 		$response = $this->server->dispatch( $request );
-		$products = $response->get_data();
+		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 6, count( $products ) );
-		$this->assertEquals( 'Dummy Product', $products[0]['name'] );
+		$this->assertEquals( 6, count( $data ) );
+		$this->assertEquals( 'Dummy Product', $data[0]['name'] );
 
 		$query_params = array(
 			'catalog_visibility' => 'search',
@@ -230,11 +229,11 @@ class Products extends WC_REST_Unit_Test_Case {
 		$request      = new WP_REST_REQUEST( 'GET', '/wc/blocks/products' );
 		$request->set_query_params( $query_params );
 		$response = $this->server->dispatch( $request );
-		$products = $response->get_data();
+		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 6, count( $products ) );
-		$this->assertEquals( 'Dummy Product', $products[0]['name'] );
+		$this->assertEquals( 6, count( $data ) );
+		$this->assertEquals( 'Dummy Product', $data[0]['name'] );
 
 		$query_params = array(
 			'catalog_visibility' => 'hidden',
@@ -242,11 +241,11 @@ class Products extends WC_REST_Unit_Test_Case {
 		$request      = new WP_REST_REQUEST( 'GET', '/wc/blocks/products' );
 		$request->set_query_params( $query_params );
 		$response = $this->server->dispatch( $request );
-		$products = $response->get_data();
+		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 1, count( $products ) );
-		$this->assertEquals( 'Hidden Product', $products[0]['name'] );
+		$this->assertEquals( 1, count( $data ) );
+		$this->assertEquals( 'Hidden Product', $data[0]['name'] );
 	}
 
 	/**
@@ -263,11 +262,11 @@ class Products extends WC_REST_Unit_Test_Case {
 		$request->set_param( 'category', $cats );
 		$request->set_param( 'category_operator', 'in' );
 
-		$response          = $this->server->dispatch( $request );
-		$response_products = $response->get_data();
+		$response = $this->server->dispatch( $request );
+		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 3, count( $response_products ) );
+		$this->assertEquals( 3, count( $data ) );
 	}
 
 	/**
@@ -284,11 +283,11 @@ class Products extends WC_REST_Unit_Test_Case {
 		$request->set_param( 'category', $cats );
 		$request->set_param( 'category_operator', 'and' );
 
-		$response          = $this->server->dispatch( $request );
-		$response_products = $response->get_data();
+		$response = $this->server->dispatch( $request );
+		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 1, count( $response_products ) );
+		$this->assertEquals( 1, count( $data ) );
 	}
 
 	/**
@@ -305,10 +304,10 @@ class Products extends WC_REST_Unit_Test_Case {
 		$request->set_param( 'category', $cats );
 		$request->set_param( 'category_operator', 'and' );
 
-		$response          = $this->server->dispatch( $request );
-		$response_products = $response->get_data();
+		$response = $this->server->dispatch( $request );
+		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 1, count( $response_products ) );
+		$this->assertEquals( 1, count( $data ) );
 	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/Cart.php b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/Cart.php
index 30113f0f3f4..5a4dbfe8c37 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/Cart.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/Cart.php
@@ -10,6 +10,8 @@ namespace Automattic\WooCommerce\Blocks\Tests\RestApi\StoreApi\Controllers;
 use \WP_REST_Request;
 use \WC_REST_Unit_Test_Case as TestCase;
 use \WC_Helper_Product as ProductHelper;
+use \WC_Helper_Coupon as CouponHelper;
+use Automattic\WooCommerce\Blocks\Tests\Helpers\ValidateSchema;
 
 /**
  * Cart Controller Tests.
@@ -38,11 +40,14 @@ class Cart extends TestCase {
 		$this->products[1]->set_regular_price( 10 );
 		$this->products[1]->save();
 
+		$this->coupon = CouponHelper::create_coupon();
+
 		wc_empty_cart();
 
-		$this->keys = [];
+		$this->keys   = [];
 		$this->keys[] = wc()->cart->add_to_cart( $this->products[0]->get_id(), 2 );
 		$this->keys[] = wc()->cart->add_to_cart( $this->products[1]->get_id(), 1 );
+		wc()->cart->apply_coupon( $this->coupon->get_code() );
 	}
 
 	/**
@@ -66,18 +71,18 @@ class Cart extends TestCase {
 		$this->assertEquals( false, $data['needs_shipping'] );
 		$this->assertEquals( '30', $data['items_weight'] );
 
-		$this->assertEquals( 'GBP', $data['totals']['currency_code'] );
-		$this->assertEquals( 2, $data['totals']['currency_minor_unit'] );
-		$this->assertEquals( '3000', $data['totals']['total_items'] );
-		$this->assertEquals( '0', $data['totals']['total_items_tax'] );
-		$this->assertEquals( '0', $data['totals']['total_fees'] );
-		$this->assertEquals( '0', $data['totals']['total_fees_tax'] );
-		$this->assertEquals( '0', $data['totals']['total_discount'] );
-		$this->assertEquals( '0', $data['totals']['total_discount_tax'] );
-		$this->assertEquals( '0', $data['totals']['total_shipping'] );
-		$this->assertEquals( '0', $data['totals']['total_shipping_tax'] );
-		$this->assertEquals( '0', $data['totals']['total_tax'] );
-		$this->assertEquals( '3000', $data['totals']['total_price'] );
+		$this->assertEquals( 'GBP', $data['totals']->currency_code );
+		$this->assertEquals( 2, $data['totals']->currency_minor_unit );
+		$this->assertEquals( '3000', $data['totals']->total_items );
+		$this->assertEquals( '0', $data['totals']->total_items_tax );
+		$this->assertEquals( '0', $data['totals']->total_fees );
+		$this->assertEquals( '0', $data['totals']->total_fees_tax );
+		$this->assertEquals( '100', $data['totals']->total_discount );
+		$this->assertEquals( '0', $data['totals']->total_discount_tax );
+		$this->assertEquals( '0', $data['totals']->total_shipping );
+		$this->assertEquals( '0', $data['totals']->total_shipping_tax );
+		$this->assertEquals( '0', $data['totals']->total_tax );
+		$this->assertEquals( '2900', $data['totals']->total_price );
 	}
 
 	/**
@@ -101,11 +106,26 @@ class Cart extends TestCase {
 		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\Cart();
 		$cart       = wc()->cart;
 		$response   = $controller->prepare_item_for_response( $cart, [] );
+		$data       = $response->get_data();
 
-		$this->assertArrayHasKey( 'items_count', $response->get_data() );
-		$this->assertArrayHasKey( 'items', $response->get_data() );
-		$this->assertArrayHasKey( 'needs_shipping', $response->get_data() );
-		$this->assertArrayHasKey( 'items_weight', $response->get_data() );
-		$this->assertArrayHasKey( 'totals', $response->get_data() );
+		$this->assertArrayHasKey( 'items_count', $data );
+		$this->assertArrayHasKey( 'items', $data );
+		$this->assertArrayHasKey( 'needs_shipping', $data );
+		$this->assertArrayHasKey( 'items_weight', $data );
+		$this->assertArrayHasKey( 'totals', $data );
+	}
+
+	/**
+	 * Test schema matches responses.
+	 */
+	public function test_schema_matches_response() {
+		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\Cart();
+		$cart       = wc()->cart;
+		$response   = $controller->prepare_item_for_response( $cart, [] );
+		$schema     = $controller->get_item_schema();
+		$validate   = new ValidateSchema( $schema );
+
+		$diff = $validate->get_diff_from_object( $response->get_data() );
+		$this->assertEmpty( $diff, print_r( $diff, true ) );
 	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartCoupons.php b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartCoupons.php
index b531f895964..7e9b1dc29bb 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartCoupons.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartCoupons.php
@@ -11,6 +11,7 @@ use \WP_REST_Request;
 use \WC_REST_Unit_Test_Case as TestCase;
 use \WC_Helper_Product as ProductHelper;
 use \WC_Helper_Coupon as CouponHelper;
+use Automattic\WooCommerce\Blocks\Tests\Helpers\ValidateSchema;
 
 /**
  * Cart Coupons Controller Tests.
@@ -62,8 +63,8 @@ class CartCoupons extends TestCase {
 
 		$this->assertEquals( 200, $response->get_status() );
 		$this->assertEquals( $this->coupon->get_code(), $data['code'] );
-		$this->assertEquals( '0', $data['totals']['total_discount'] );
-		$this->assertEquals( '0', $data['totals']['total_discount_tax'] );
+		$this->assertEquals( '0', $data['totals']->total_discount );
+		$this->assertEquals( '0', $data['totals']->total_discount_tax );
 	}
 
 	/**
@@ -162,8 +163,22 @@ class CartCoupons extends TestCase {
 	public function test_prepare_item_for_response() {
 		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\CartCoupons();
 		$response   = $controller->prepare_item_for_response( $this->coupon->get_code(), [] );
+		$data       = $response->get_data();
 
-		$this->assertArrayHasKey( 'code', $response->get_data() );
-		$this->assertArrayHasKey( 'totals', $response->get_data() );
+		$this->assertArrayHasKey( 'code', $data );
+		$this->assertArrayHasKey( 'totals', $data );
+	}
+
+	/**
+	 * Test schema matches responses.
+	 */
+	public function test_schema_matches_response() {
+		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\CartCoupons();
+		$response   = $controller->prepare_item_for_response( $this->coupon->get_code(), [] );
+		$schema     = $controller->get_item_schema();
+		$validate   = new ValidateSchema( $schema );
+
+		$diff = $validate->get_diff_from_object( $response->get_data() );
+		$this->assertEmpty( $diff, print_r( $diff, true ) );
 	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartItems.php b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartItems.php
index 2a5b6b5710d..05b4688b908 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartItems.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartItems.php
@@ -10,6 +10,7 @@ namespace Automattic\WooCommerce\Blocks\Tests\RestApi\StoreApi\Controllers;
 use \WP_REST_Request;
 use \WC_REST_Unit_Test_Case as TestCase;
 use \WC_Helper_Product as ProductHelper;
+use Automattic\WooCommerce\Blocks\Tests\Helpers\ValidateSchema;
 
 /**
  * Cart Controller Tests.
@@ -19,6 +20,8 @@ class CartItems extends TestCase {
 	 * Setup test products data. Called before every test.
 	 */
 	public function setUp() {
+		global $wpdb;
+
 		parent::setUp();
 
 		wp_set_current_user( 0 );
@@ -27,22 +30,28 @@ class CartItems extends TestCase {
 
 		$this->products = [];
 
-		// Create some test products.
+		// Create a test simple product.
 		$this->products[0] = ProductHelper::create_simple_product( false );
 		$this->products[0]->set_weight( 10 );
 		$this->products[0]->set_regular_price( 10 );
 		$this->products[0]->save();
 
-		$this->products[1] = ProductHelper::create_simple_product( false );
+		$image_url = media_sideload_image( 'http://cldup.com/Dr1Bczxq4q.png', $this->products[0]->get_id(), '', 'src' );
+		$image_id  = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM {$wpdb->posts} WHERE guid = %s", $image_url ) );
+		$this->products[0]->set_image_id( $image_id[0] );
+		$this->products[0]->save();
+
+		// Create a test variable product.
+		$this->products[1] = ProductHelper::create_variation_product( false );
 		$this->products[1]->set_weight( 10 );
 		$this->products[1]->set_regular_price( 10 );
 		$this->products[1]->save();
 
 		wc_empty_cart();
 
-		$this->keys = [];
+		$this->keys   = [];
 		$this->keys[] = wc()->cart->add_to_cart( $this->products[0]->get_id(), 2 );
-		$this->keys[] = wc()->cart->add_to_cart( $this->products[1]->get_id(), 1 );
+		$this->keys[] = wc()->cart->add_to_cart( $this->products[1]->get_id(), 1, current( $this->products[1]->get_children() ), [ 'size' => 'small' ] );
 	}
 
 	/**
@@ -79,8 +88,8 @@ class CartItems extends TestCase {
 		$this->assertEquals( $this->products[0]->get_sku(), $data['sku'] );
 		$this->assertEquals( $this->products[0]->get_permalink(), $data['permalink'] );
 		$this->assertEquals( 2, $data['quantity'] );
-		$this->assertEquals( '2000', $data['totals']['line_subtotal'] );
-		$this->assertEquals( '2000', $data['totals']['line_total'] );
+		$this->assertEquals( '2000', $data['totals']->line_subtotal );
+		$this->assertEquals( '2000', $data['totals']->line_total );
 
 		$request  = new WP_REST_Request( 'DELETE', '/wc/store/cart/items/XXX815416f775098fe977004015c6193' );
 		$response = $this->server->dispatch( $request );
@@ -135,7 +144,6 @@ class CartItems extends TestCase {
 			)
 		);
 		$response = $this->server->dispatch( $request );
-		$data     = $response->get_data();
 
 		$this->assertEquals( 403, $response->get_status() );
 	}
@@ -161,14 +169,14 @@ class CartItems extends TestCase {
 	 * Test delete item.
 	 */
 	public function test_delete_item() {
-		$request = new WP_REST_Request( 'DELETE', '/wc/store/cart/items/' . $this->keys[0] );
+		$request  = new WP_REST_Request( 'DELETE', '/wc/store/cart/items/' . $this->keys[0] );
 		$response = $this->server->dispatch( $request );
 		$data     = $response->get_data();
 
 		$this->assertEquals( 204, $response->get_status() );
 		$this->assertEmpty( $data );
 
-		$request = new WP_REST_Request( 'DELETE', '/wc/store/cart/items/' . $this->keys[0] );
+		$request  = new WP_REST_Request( 'DELETE', '/wc/store/cart/items/' . $this->keys[0] );
 		$response = $this->server->dispatch( $request );
 		$data     = $response->get_data();
 
@@ -179,7 +187,7 @@ class CartItems extends TestCase {
 	 * Test delete all items.
 	 */
 	public function test_delete_items() {
-		$request = new WP_REST_Request( 'DELETE', '/wc/store/cart/items' );
+		$request  = new WP_REST_Request( 'DELETE', '/wc/store/cart/items' );
 		$response = $this->server->dispatch( $request );
 		$data     = $response->get_data();
 
@@ -218,15 +226,38 @@ class CartItems extends TestCase {
 		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\CartItems();
 		$cart       = wc()->cart->get_cart();
 		$response   = $controller->prepare_item_for_response( current( $cart ), [] );
+		$data       = $response->get_data();
 
-		$this->assertArrayHasKey( 'key', $response->get_data() );
-		$this->assertArrayHasKey( 'id', $response->get_data() );
-		$this->assertArrayHasKey( 'quantity', $response->get_data() );
-		$this->assertArrayHasKey( 'name', $response->get_data() );
-		$this->assertArrayHasKey( 'sku', $response->get_data() );
-		$this->assertArrayHasKey( 'permalink', $response->get_data() );
-		$this->assertArrayHasKey( 'images', $response->get_data() );
-		$this->assertArrayHasKey( 'totals', $response->get_data() );
-		$this->assertArrayHasKey( 'variation', $response->get_data() );
+		$this->assertArrayHasKey( 'key', $data );
+		$this->assertArrayHasKey( 'id', $data );
+		$this->assertArrayHasKey( 'quantity', $data );
+		$this->assertArrayHasKey( 'name', $data );
+		$this->assertArrayHasKey( 'sku', $data );
+		$this->assertArrayHasKey( 'permalink', $data );
+		$this->assertArrayHasKey( 'images', $data );
+		$this->assertArrayHasKey( 'totals', $data );
+		$this->assertArrayHasKey( 'variation', $data );
+	}
+
+	/**
+	 * Test schema matches responses.
+	 *
+	 * Tests schema of both products in cart to cover as much schema as possible.
+	 */
+	public function test_schema_matches_response() {
+		$cart       = wc()->cart->get_cart();
+		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\CartItems();
+		$schema     = $controller->get_item_schema();
+		$validate   = new ValidateSchema( $schema );
+
+		// Simple product.
+		$response = $controller->prepare_item_for_response( current( $cart ), [] );
+		$diff     = $validate->get_diff_from_object( $response->get_data() );
+		$this->assertEmpty( $diff, print_r( $diff, true ) );
+
+		// Variable product.
+		$response = $controller->prepare_item_for_response( end( $cart ), [] );
+		$diff     = $validate->get_diff_from_object( $response->get_data() );
+		$this->assertEmpty( $diff, print_r( $diff, true ) );
 	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartOrder.php b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartOrder.php
index 599c7716f23..16901cc7e57 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartOrder.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartOrder.php
@@ -11,6 +11,8 @@ use \WP_REST_Request;
 use \WC_REST_Unit_Test_Case as TestCase;
 use \WC_Helper_Product as ProductHelper;
 use \WC_Helper_Order as OrderHelper;
+use \WC_Helper_Coupon as CouponHelper;
+use Automattic\WooCommerce\Blocks\Tests\Helpers\ValidateSchema;
 
 /**
  * Cart Order Controller Tests.
@@ -95,16 +97,16 @@ class CartOrder extends TestCase {
 		$this->assertArrayHasKey( 'items', $data );
 		$this->assertArrayHasKey( 'totals', $data );
 
-		$this->assertEquals( 'Margaret', $data['billing_address']['first_name'] );
-		$this->assertEquals( 'Thatchcroft', $data['billing_address']['last_name'] );
-		$this->assertEquals( '123 South Street', $data['billing_address']['address_1'] );
-		$this->assertEquals( 'Apt 1', $data['billing_address']['address_2'] );
-		$this->assertEquals( 'Philadelphia', $data['billing_address']['city'] );
-		$this->assertEquals( 'PA', $data['billing_address']['state'] );
-		$this->assertEquals( '19123', $data['billing_address']['postcode'] );
-		$this->assertEquals( 'US', $data['billing_address']['country'] );
-		$this->assertEquals( 'test@test.com', $data['billing_address']['email'] );
-		$this->assertEquals( '', $data['billing_address']['phone'] );
+		$this->assertEquals( 'Margaret', $data['billing_address']->first_name );
+		$this->assertEquals( 'Thatchcroft', $data['billing_address']->last_name );
+		$this->assertEquals( '123 South Street', $data['billing_address']->address_1 );
+		$this->assertEquals( 'Apt 1', $data['billing_address']->address_2 );
+		$this->assertEquals( 'Philadelphia', $data['billing_address']->city );
+		$this->assertEquals( 'PA', $data['billing_address']->state );
+		$this->assertEquals( '19123', $data['billing_address']->postcode );
+		$this->assertEquals( 'US', $data['billing_address']->country );
+		$this->assertEquals( 'test@test.com', $data['billing_address']->email );
+		$this->assertEquals( '', $data['billing_address']->phone );
 
 		$this->assertEquals( 'checkout-draft', $data['status'] );
 		$this->assertEquals( 2, count( $data['items'] ) );
@@ -139,19 +141,38 @@ class CartOrder extends TestCase {
 		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\CartOrder();
 		$order      = OrderHelper::create_order();
 		$response   = $controller->prepare_item_for_response( $order, [] );
+		$data       = $response->get_data();
 
-		$this->assertArrayHasKey( 'id', $response->get_data() );
-		$this->assertArrayHasKey( 'number', $response->get_data() );
-		$this->assertArrayHasKey( 'status', $response->get_data() );
-		$this->assertArrayHasKey( 'order_key', $response->get_data() );
-		$this->assertArrayHasKey( 'created_via', $response->get_data() );
-		$this->assertArrayHasKey( 'prices_include_tax', $response->get_data() );
-		$this->assertArrayHasKey( 'events', $response->get_data() );
-		$this->assertArrayHasKey( 'customer', $response->get_data() );
-		$this->assertArrayHasKey( 'billing_address', $response->get_data() );
-		$this->assertArrayHasKey( 'shipping_address', $response->get_data() );
-		$this->assertArrayHasKey( 'customer_note', $response->get_data() );
-		$this->assertArrayHasKey( 'items', $response->get_data() );
-		$this->assertArrayHasKey( 'totals', $response->get_data() );
+		$this->assertArrayHasKey( 'id', $data );
+		$this->assertArrayHasKey( 'number', $data );
+		$this->assertArrayHasKey( 'status', $data );
+		$this->assertArrayHasKey( 'order_key', $data );
+		$this->assertArrayHasKey( 'created_via', $data );
+		$this->assertArrayHasKey( 'prices_include_tax', $data );
+		$this->assertArrayHasKey( 'events', $data );
+		$this->assertArrayHasKey( 'customer', $data );
+		$this->assertArrayHasKey( 'billing_address', $data );
+		$this->assertArrayHasKey( 'shipping_address', $data );
+		$this->assertArrayHasKey( 'customer_note', $data );
+		$this->assertArrayHasKey( 'items', $data );
+		$this->assertArrayHasKey( 'totals', $data );
+	}
+
+	/**
+	 * Test schema matches responses.
+	 */
+	public function test_schema_matches_response() {
+		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\CartOrder();
+
+		$order  = OrderHelper::create_order();
+		$coupon = CouponHelper::create_coupon();
+		$order->apply_coupon( $coupon );
+
+		$response = $controller->prepare_item_for_response( $order, [] );
+		$schema   = $controller->get_item_schema();
+		$validate = new ValidateSchema( $schema );
+
+		$diff = $validate->get_diff_from_object( $response->get_data() );
+		$this->assertEmpty( $diff, print_r( $diff, true ) );
 	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartShippingRates.php b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartShippingRates.php
index c0aa1d4ec2a..69d2d16578a 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartShippingRates.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/CartShippingRates.php
@@ -10,6 +10,8 @@ namespace Automattic\WooCommerce\Blocks\Tests\RestApi\StoreApi\Controllers;
 use \WP_REST_Request;
 use \WC_REST_Unit_Test_Case as TestCase;
 use \WC_Helper_Product as ProductHelper;
+use \WC_Helper_Shipping;
+use Automattic\WooCommerce\Blocks\Tests\Helpers\ValidateSchema;
 
 /**
  * Cart Shipping Rates Controller Tests.
@@ -35,6 +37,8 @@ class CartShippingRates extends TestCase {
 		wc_empty_cart();
 		wc()->cart->add_to_cart( $this->products[0]->get_id(), 2 );
 		wc()->cart->add_to_cart( $this->products[1]->get_id(), 1 );
+
+		WC_Helper_Shipping::create_simple_flat_rate();
 	}
 
 	/**
@@ -61,12 +65,12 @@ class CartShippingRates extends TestCase {
 		$this->assertArrayHasKey( 'items', $data[0] );
 		$this->assertArrayHasKey( 'shipping_rates', $data[0] );
 
-		$this->assertEquals( null, $data[0]['destination']['address_1'] );
-		$this->assertEquals( null, $data[0]['destination']['address_2'] );
-		$this->assertEquals( null, $data[0]['destination']['city'] );
-		$this->assertEquals( null, $data[0]['destination']['state'] );
-		$this->assertEquals( null, $data[0]['destination']['postcode'] );
-		$this->assertEquals( 'US', $data[0]['destination']['country'] );
+		$this->assertEquals( null, $data[0]['destination']->address_1 );
+		$this->assertEquals( null, $data[0]['destination']->address_2 );
+		$this->assertEquals( null, $data[0]['destination']->city );
+		$this->assertEquals( null, $data[0]['destination']->state );
+		$this->assertEquals( null, $data[0]['destination']->postcode );
+		$this->assertEquals( 'US', $data[0]['destination']->country );
 	}
 
 	/**
@@ -94,12 +98,12 @@ class CartShippingRates extends TestCase {
 		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 'Test address 1', $data[0]['destination']['address_1'] );
-		$this->assertEquals( 'Test address 2', $data[0]['destination']['address_2'] );
-		$this->assertEquals( 'Test City', $data[0]['destination']['city'] );
-		$this->assertEquals( 'AL', $data[0]['destination']['state'] );
-		$this->assertEquals( '90210', $data[0]['destination']['postcode'] );
-		$this->assertEquals( 'US', $data[0]['destination']['country'] );
+		$this->assertEquals( 'Test address 1', $data[0]['destination']->address_1 );
+		$this->assertEquals( 'Test address 2', $data[0]['destination']->address_2 );
+		$this->assertEquals( 'Test City', $data[0]['destination']->city );
+		$this->assertEquals( 'AL', $data[0]['destination']->state );
+		$this->assertEquals( '90210', $data[0]['destination']->postcode );
+		$this->assertEquals( 'US', $data[0]['destination']->country );
 
 		// US address with invalid state.
 		$request = new WP_REST_Request( 'GET', '/wc/store/cart/shipping-rates' );
@@ -118,8 +122,8 @@ class CartShippingRates extends TestCase {
 		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 'AL', $data[0]['destination']['state'] );
-		$this->assertEquals( 'US', $data[0]['destination']['country'] );
+		$this->assertEquals( 'AL', $data[0]['destination']->state );
+		$this->assertEquals( 'US', $data[0]['destination']->country );
 	}
 
 	/**
@@ -149,10 +153,11 @@ class CartShippingRates extends TestCase {
 		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\CartShippingRates();
 		$packages   = wc()->shipping->calculate_shipping( wc()->cart->get_shipping_packages() );
 		$response   = $controller->prepare_item_for_response( current( $packages ), [] );
+		$data       = $response->get_data();
 
-		$this->assertArrayHasKey( 'destination', $response->get_data() );
-		$this->assertArrayHasKey( 'items', $response->get_data() );
-		$this->assertArrayHasKey( 'shipping_rates', $response->get_data() );
+		$this->assertArrayHasKey( 'destination', $data );
+		$this->assertArrayHasKey( 'items', $data );
+		$this->assertArrayHasKey( 'shipping_rates', $data );
 	}
 
 	/**
@@ -169,4 +174,24 @@ class CartShippingRates extends TestCase {
 		$this->assertArrayHasKey( 'country', $params );
 		$this->assertArrayHasKey( 'postcode', $params );
 	}
+
+	/**
+	 * Test schema matches responses.
+	 */
+	public function test_schema_matches_response() {
+		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\CartShippingRates();
+		$request    = new WP_REST_Request( 'GET', '/wc/store/cart/shipping-rates' );
+		$request->set_param( 'address_1', 'Test address 1' );
+		$request->set_param( 'address_2', 'Test address 2' );
+		$request->set_param( 'city', 'Test City' );
+		$request->set_param( 'state', 'AL' );
+		$request->set_param( 'postcode', '90210' );
+		$request->set_param( 'country', 'US' );
+		$response = $this->server->dispatch( $request );
+		$schema   = $controller->get_item_schema();
+		$validate = new ValidateSchema( $schema );
+
+		$diff = $validate->get_diff_from_object( current( $response->get_data() ) );
+		$this->assertEmpty( $diff, print_r( $diff, true ) );
+	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/Customer.php b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/Customer.php
index 8f433af0733..aa7b278d600 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/Customer.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/Customer.php
@@ -10,6 +10,7 @@ namespace Automattic\WooCommerce\Blocks\Tests\RestApi\StoreApi\Controllers;
 use \WP_REST_Request;
 use \WC_REST_Unit_Test_Case as TestCase;
 use \WC_Helper_Product as ProductHelper;
+use Automattic\WooCommerce\Blocks\Tests\Helpers\ValidateSchema;
 
 /**
  * Customer Controller Tests.
@@ -57,12 +58,12 @@ class Customer extends TestCase {
 		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( '123 South Street', $data['billing_address']['address_1'] );
-		$this->assertEquals( 'Apt 1', $data['billing_address']['address_2'] );
-		$this->assertEquals( 'Philadelphia', $data['billing_address']['city'] );
-		$this->assertEquals( 'PA', $data['billing_address']['state'] );
-		$this->assertEquals( '19123', $data['billing_address']['postcode'] );
-		$this->assertEquals( 'US', $data['billing_address']['country'] );
+		$this->assertEquals( '123 South Street', $data['billing_address']->address_1 );
+		$this->assertEquals( 'Apt 1', $data['billing_address']->address_2 );
+		$this->assertEquals( 'Philadelphia', $data['billing_address']->city );
+		$this->assertEquals( 'PA', $data['billing_address']->state );
+		$this->assertEquals( '19123', $data['billing_address']->postcode );
+		$this->assertEquals( 'US', $data['billing_address']->country );
 
 		// Invalid email.
 		$request = new WP_REST_Request( 'POST', '/wc/store/customer' );
@@ -121,22 +122,57 @@ class Customer extends TestCase {
 		$response = $controller->prepare_item_for_response( $customer, [] );
 		$data     = $response->get_data();
 
-		$this->assertEquals( 'Name', $data['billing_address']['first_name'] );
-		$this->assertEquals( 'Surname', $data['billing_address']['last_name'] );
-		$this->assertEquals( '123 South Street', $data['billing_address']['address_1'] );
-		$this->assertEquals( 'Apt 1', $data['billing_address']['address_2'] );
-		$this->assertEquals( 'Philadelphia', $data['billing_address']['city'] );
-		$this->assertEquals( 'PA', $data['billing_address']['state'] );
-		$this->assertEquals( '19123', $data['billing_address']['postcode'] );
-		$this->assertEquals( 'US', $data['billing_address']['country'] );
+		$this->assertEquals( 'Name', $data['billing_address']->first_name );
+		$this->assertEquals( 'Surname', $data['billing_address']->last_name );
+		$this->assertEquals( '123 South Street', $data['billing_address']->address_1 );
+		$this->assertEquals( 'Apt 1', $data['billing_address']->address_2 );
+		$this->assertEquals( 'Philadelphia', $data['billing_address']->city );
+		$this->assertEquals( 'PA', $data['billing_address']->state );
+		$this->assertEquals( '19123', $data['billing_address']->postcode );
+		$this->assertEquals( 'US', $data['billing_address']->country );
 
-		$this->assertEquals( 'Name', $data['shipping_address']['first_name'] );
-		$this->assertEquals( 'Surname', $data['shipping_address']['last_name'] );
-		$this->assertEquals( '123 South Street', $data['shipping_address']['address_1'] );
-		$this->assertEquals( 'Apt 1', $data['shipping_address']['address_2'] );
-		$this->assertEquals( 'Philadelphia', $data['shipping_address']['city'] );
-		$this->assertEquals( 'PA', $data['shipping_address']['state'] );
-		$this->assertEquals( '19123', $data['shipping_address']['postcode'] );
-		$this->assertEquals( 'US', $data['shipping_address']['country'] );
+		$this->assertEquals( 'Name', $data['shipping_address']->first_name );
+		$this->assertEquals( 'Surname', $data['shipping_address']->last_name );
+		$this->assertEquals( '123 South Street', $data['shipping_address']->address_1 );
+		$this->assertEquals( 'Apt 1', $data['shipping_address']->address_2 );
+		$this->assertEquals( 'Philadelphia', $data['shipping_address']->city );
+		$this->assertEquals( 'PA', $data['shipping_address']->state );
+		$this->assertEquals( '19123', $data['shipping_address']->postcode );
+		$this->assertEquals( 'US', $data['shipping_address']->country );
+	}
+
+	/**
+	 * Test schema matches responses.
+	 */
+	public function test_schema_matches_response() {
+		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\Customer();
+		$customer   = new \WC_Customer();
+
+		$customer->set_billing_first_name( 'Name' );
+		$customer->set_billing_last_name( 'Surname' );
+		$customer->set_billing_email( 'test@test.com' );
+		$customer->set_billing_phone( '+44 01010101011' );
+		$customer->set_billing_address_1( '123 South Street' );
+		$customer->set_billing_address_2( 'Apt 1' );
+		$customer->set_billing_city( 'Philadelphia' );
+		$customer->set_billing_state( 'PA' );
+		$customer->set_billing_postcode( '19123' );
+		$customer->set_billing_country( 'US' );
+
+		$customer->set_shipping_first_name( 'Name' );
+		$customer->set_shipping_last_name( 'Surname' );
+		$customer->set_shipping_address_1( '123 South Street' );
+		$customer->set_shipping_address_2( 'Apt 1' );
+		$customer->set_shipping_city( 'Philadelphia' );
+		$customer->set_shipping_state( 'PA' );
+		$customer->set_shipping_postcode( '19123' );
+		$customer->set_shipping_country( 'US' );
+
+		$response = $controller->prepare_item_for_response( $customer, [] );
+		$schema   = $controller->get_item_schema();
+		$validate = new ValidateSchema( $schema );
+
+		$diff = $validate->get_diff_from_object( $response->get_data() );
+		$this->assertEmpty( $diff, print_r( $diff, true ) );
 	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/ProductAttributeTerms.php b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/ProductAttributeTerms.php
index 98c3ec16ed7..3270045b88a 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/ProductAttributeTerms.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/ProductAttributeTerms.php
@@ -10,6 +10,7 @@ namespace Automattic\WooCommerce\Blocks\Tests\RestApi\StoreApi\Controllers;
 use \WP_REST_Request;
 use \WC_REST_Unit_Test_Case as TestCase;
 use \WC_Helper_Product as ProductHelper;
+use Automattic\WooCommerce\Blocks\Tests\Helpers\ValidateSchema;
 
 /**
  * Product Attributes Controller Tests.
@@ -27,10 +28,14 @@ class ProductAttributeTerms extends TestCase {
 		$this->attributes[0] = ProductHelper::create_attribute( 'color', [ 'red', 'green', 'blue' ] );
 		$this->attributes[1] = ProductHelper::create_attribute( 'size', [ 'small', 'medium', 'large' ] );
 
-		wp_insert_term( 'test', 'pa_size', [
-			'description' => 'This is a test description',
-			'slug'        => 'test-slug',
-		] );
+		wp_insert_term(
+			'test',
+			'pa_size',
+			[
+				'description' => 'This is a test description',
+				'slug'        => 'test-slug',
+			]
+		);
 	}
 
 	/**
@@ -99,4 +104,17 @@ class ProductAttributeTerms extends TestCase {
 		$this->assertArrayHasKey( 'orderby', $params );
 		$this->assertArrayHasKey( 'hide_empty', $params );
 	}
+
+	/**
+	 * Test schema matches responses.
+	 */
+	public function test_schema_matches_response() {
+		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\ProductAttributeTerms();
+		$response   = $controller->prepare_item_for_response( get_term_by( 'name', 'test', 'pa_size' ), [] );
+		$schema     = $controller->get_item_schema();
+		$validate   = new ValidateSchema( $schema );
+
+		$diff = $validate->get_diff_from_object( $response->get_data() );
+		$this->assertEmpty( $diff, print_r( $diff, true ) );
+	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/ProductAttributes.php b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/ProductAttributes.php
index 102e48a01d8..f2c29e330f6 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/ProductAttributes.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/ProductAttributes.php
@@ -10,6 +10,7 @@ namespace Automattic\WooCommerce\Blocks\Tests\RestApi\StoreApi\Controllers;
 use \WP_REST_Request;
 use \WC_REST_Unit_Test_Case as TestCase;
 use \WC_Helper_Product as ProductHelper;
+use Automattic\WooCommerce\Blocks\Tests\Helpers\ValidateSchema;
 
 /**
  * Product Attributes Controller Tests.
@@ -24,7 +25,7 @@ class ProductAttributes extends TestCase {
 		wp_set_current_user( 0 );
 
 		$color_attribute = ProductHelper::create_attribute( 'color', [ 'red', 'green', 'blue' ] );
-		$size_attribute = ProductHelper::create_attribute( 'size', [ 'small', 'medium', 'large' ] );
+		$size_attribute  = ProductHelper::create_attribute( 'size', [ 'small', 'medium', 'large' ] );
 
 		$this->attributes   = [];
 		$this->attributes[] = wc_get_attribute( $color_attribute['attribute_id'] );
@@ -94,12 +95,26 @@ class ProductAttributes extends TestCase {
 	public function test_prepare_item_for_response() {
 		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\ProductAttributes();
 		$response   = $controller->prepare_item_for_response( $this->attributes[0], [] );
+		$data       = $response->get_data();
 
-		$this->assertArrayHasKey( 'id', $response->get_data() );
-		$this->assertArrayHasKey( 'name', $response->get_data() );
-		$this->assertArrayHasKey( 'slug', $response->get_data() );
-		$this->assertArrayHasKey( 'type', $response->get_data() );
-		$this->assertArrayHasKey( 'order', $response->get_data() );
-		$this->assertArrayHasKey( 'has_archives', $response->get_data() );
+		$this->assertArrayHasKey( 'id', $data );
+		$this->assertArrayHasKey( 'name', $data );
+		$this->assertArrayHasKey( 'slug', $data );
+		$this->assertArrayHasKey( 'type', $data );
+		$this->assertArrayHasKey( 'order', $data );
+		$this->assertArrayHasKey( 'has_archives', $data );
+	}
+
+	/**
+	 * Test schema matches responses.
+	 */
+	public function test_schema_matches_response() {
+		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\ProductAttributes();
+		$response   = $controller->prepare_item_for_response( $this->attributes[0], [] );
+		$schema     = $controller->get_item_schema();
+		$validate   = new ValidateSchema( $schema );
+
+		$diff = $validate->get_diff_from_object( $response->get_data() );
+		$this->assertEmpty( $diff, print_r( $diff, true ) );
 	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/ProductCollectionData.php b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/ProductCollectionData.php
index 97947daf794..9c79c6e268b 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/ProductCollectionData.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/ProductCollectionData.php
@@ -10,6 +10,7 @@ namespace Automattic\WooCommerce\Blocks\Tests\RestApi\StoreApi\Controllers;
 use \WP_REST_Request;
 use \WC_REST_Unit_Test_Case as TestCase;
 use \WC_Helper_Product as ProductHelper;
+use Automattic\WooCommerce\Blocks\Tests\Helpers\ValidateSchema;
 
 /**
  * Controller Tests.
@@ -23,7 +24,7 @@ class ProductCollectionData extends TestCase {
 
 		wp_set_current_user( 0 );
 
-		$this->products = [];
+		$this->products    = [];
 		$this->products[0] = ProductHelper::create_simple_product( false );
 		$this->products[0]->set_regular_price( 10 );
 		$this->products[0]->save();
@@ -32,31 +33,35 @@ class ProductCollectionData extends TestCase {
 		$this->products[1]->set_regular_price( 100 );
 		$this->products[1]->save();
 
-		wp_insert_comment( [
-			'comment_post_ID'      => $this->products[0]->get_id(),
-			'comment_author'       => 'admin',
-			'comment_author_email' => 'woo@woo.local',
-			'comment_author_url'   => '',
-			'comment_content'      => 'Good product.',
-			'comment_approved'     => 1,
-			'comment_type'         => 'review',
-			'comment_meta' => [
-				'rating' => 5,
+		wp_insert_comment(
+			[
+				'comment_post_ID'      => $this->products[0]->get_id(),
+				'comment_author'       => 'admin',
+				'comment_author_email' => 'woo@woo.local',
+				'comment_author_url'   => '',
+				'comment_content'      => 'Good product.',
+				'comment_approved'     => 1,
+				'comment_type'         => 'review',
+				'comment_meta'         => [
+					'rating' => 5,
+				],
 			]
-		] );
+		);
 
-		wp_insert_comment( [
-			'comment_post_ID'      => $this->products[1]->get_id(),
-			'comment_author'       => 'admin',
-			'comment_author_email' => 'woo@woo.local',
-			'comment_author_url'   => '',
-			'comment_content'      => 'Another very good product.',
-			'comment_approved'     => 1,
-			'comment_type'         => 'review',
-			'comment_meta' => [
-				'rating' => 4,
+		wp_insert_comment(
+			[
+				'comment_post_ID'      => $this->products[1]->get_id(),
+				'comment_author'       => 'admin',
+				'comment_author_email' => 'woo@woo.local',
+				'comment_author_url'   => '',
+				'comment_content'      => 'Another very good product.',
+				'comment_approved'     => 1,
+				'comment_type'         => 'review',
+				'comment_meta'         => [
+					'rating' => 4,
+				],
 			]
-		] );
+		);
 
 		\WC_Comments::clear_transients( $this->products[0]->get_id() );
 		\WC_Comments::clear_transients( $this->products[1]->get_id() );
@@ -93,9 +98,9 @@ class ProductCollectionData extends TestCase {
 		$data     = $response->get_data();
 
 		$this->assertEquals( 200, $response->get_status() );
-		$this->assertEquals( 2, $data['price_range']['currency_minor_unit'] );
-		$this->assertEquals( '1000', $data['price_range']['min_price'] );
-		$this->assertEquals( '10000', $data['price_range']['max_price'] );
+		$this->assertEquals( 2, $data['price_range']->currency_minor_unit );
+		$this->assertEquals( '1000', $data['price_range']->min_price );
+		$this->assertEquals( '10000', $data['price_range']->max_price );
 		$this->assertEquals( null, $data['attribute_counts'] );
 		$this->assertEquals( null, $data['rating_counts'] );
 	}
@@ -113,7 +118,7 @@ class ProductCollectionData extends TestCase {
 				[
 					'taxonomy'   => 'pa_size',
 					'query_type' => 'and',
-				]
+				],
 			]
 		);
 		$response = $this->server->dispatch( $request );
@@ -123,8 +128,8 @@ class ProductCollectionData extends TestCase {
 		$this->assertEquals( null, $data['price_range'] );
 		$this->assertEquals( null, $data['rating_counts'] );
 
-		$this->assertArrayHasKey( 'term', $data['attribute_counts'][0] );
-		$this->assertArrayHasKey( 'count', $data['attribute_counts'][0] );
+		$this->assertObjectHasAttribute( 'term', $data['attribute_counts'][0] );
+		$this->assertObjectHasAttribute( 'count', $data['attribute_counts'][0] );
 	}
 
 	/**
@@ -139,16 +144,19 @@ class ProductCollectionData extends TestCase {
 		$this->assertEquals( 200, $response->get_status() );
 		$this->assertEquals( null, $data['price_range'] );
 		$this->assertEquals( null, $data['attribute_counts'] );
-		$this->assertEquals( [
+		$this->assertEquals(
 			[
-				'rating' => 4,
-				'count'  => 1,
+				(object) [
+					'rating' => 4,
+					'count'  => 1,
+				],
+				(object) [
+					'rating' => 5,
+					'count'  => 1,
+				],
 			],
-			[
-				'rating' => 5,
-				'count'  => 1,
-			]
-		], $data['rating_counts'] );
+			$data['rating_counts']
+		);
 	}
 
 	/**
@@ -177,4 +185,30 @@ class ProductCollectionData extends TestCase {
 		$this->assertArrayHasKey( 'calculate_attribute_counts', $params );
 		$this->assertArrayHasKey( 'calculate_rating_counts', $params );
 	}
+
+	/**
+	 * Test schema matches responses.
+	 */
+	public function test_schema_matches_response() {
+		ProductHelper::create_variation_product();
+		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\ProductCollectionData();
+		$request    = new WP_REST_Request( 'GET', '/wc/store/products/collection-data' );
+		$request->set_param( 'calculate_price_range', true );
+		$request->set_param(
+			'calculate_attribute_counts',
+			[
+				[
+					'taxonomy'   => 'pa_size',
+					'query_type' => 'and',
+				],
+			]
+		);
+		$request->set_param( 'calculate_rating_counts', true );
+		$response = $this->server->dispatch( $request );
+		$schema   = $controller->get_item_schema();
+		$validate = new ValidateSchema( $schema );
+
+		$diff = $validate->get_diff_from_object( $response->get_data() );
+		$this->assertEmpty( $diff, print_r( $diff, true ) );
+	}
 }
diff --git a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/Products.php b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/Products.php
index e44f7643221..e2a781f6b4f 100644
--- a/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/Products.php
+++ b/plugins/woocommerce-blocks/tests/php/RestApi/StoreApi/Controllers/Products.php
@@ -10,6 +10,7 @@ namespace Automattic\WooCommerce\Blocks\Tests\RestApi\StoreApi\Controllers;
 use \WP_REST_Request;
 use \WC_REST_Unit_Test_Case as TestCase;
 use \WC_Helper_Product as ProductHelper;
+use Automattic\WooCommerce\Blocks\Tests\Helpers\ValidateSchema;
 
 /**
  * Products Controller Tests.
@@ -19,13 +20,25 @@ class Products extends TestCase {
 	 * Setup test products data. Called before every test.
 	 */
 	public function setUp() {
+		global $wpdb;
+
 		parent::setUp();
 
 		wp_set_current_user( 0 );
 
-		$this->products = [];
+		$this->products    = [];
 		$this->products[0] = ProductHelper::create_simple_product( true );
 		$this->products[1] = ProductHelper::create_simple_product( true );
+
+		$image_url = media_sideload_image( 'http://cldup.com/Dr1Bczxq4q.png', $this->products[0]->get_id(), '', 'src' );
+		$image_id  = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM {$wpdb->posts} WHERE guid = %s", $image_url ) );
+		$this->products[0]->set_image_id( $image_id[0] );
+		$this->products[0]->save();
+
+		$image_url = media_sideload_image( 'http://cldup.com/Dr1Bczxq4q.png', $this->products[1]->get_id(), '', 'src' );
+		$image_id  = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM {$wpdb->posts} WHERE guid = %s", $image_url ) );
+		$this->products[1]->set_image_id( $image_id[0] );
+		$this->products[1]->save();
 	}
 
 	/**
@@ -49,14 +62,14 @@ class Products extends TestCase {
 		$this->assertEquals( $this->products[0]->get_title(), $data['name'] );
 		$this->assertEquals( $this->products[0]->get_permalink(), $data['permalink'] );
 		$this->assertEquals( $this->products[0]->get_sku(), $data['sku'] );
-		$this->assertEquals( $this->products[0]->get_price(), $data['prices']['price'] / ( 10 ** $data['prices']['currency_minor_unit'] ) );
+		$this->assertEquals( $this->products[0]->get_price(), $data['prices']->price / ( 10 ** $data['prices']->currency_minor_unit ) );
 		$this->assertEquals( $this->products[0]->get_average_rating(), $data['average_rating'] );
 		$this->assertEquals( $this->products[0]->get_review_count(), $data['review_count'] );
 		$this->assertEquals( $this->products[0]->has_options(), $data['has_options'] );
 		$this->assertEquals( $this->products[0]->is_purchasable(), $data['is_purchasable'] );
 		$this->assertEquals( $this->products[0]->is_in_stock(), $data['is_in_stock'] );
-		$this->assertEquals( $this->products[0]->add_to_cart_text(), $data['add_to_cart']['text'] );
-		$this->assertEquals( $this->products[0]->add_to_cart_description(), $data['add_to_cart']['description'] );
+		$this->assertEquals( $this->products[0]->add_to_cart_text(), $data['add_to_cart']->text );
+		$this->assertEquals( $this->products[0]->add_to_cart_description(), $data['add_to_cart']->description );
 		$this->assertEquals( $this->products[0]->is_on_sale(), $data['on_sale'] );
 	}
 
@@ -116,22 +129,23 @@ class Products extends TestCase {
 	public function test_prepare_item_for_response() {
 		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\Products();
 		$response   = $controller->prepare_item_for_response( $this->products[0], [] );
+		$data       = $response->get_data();
 
-		$this->assertArrayHasKey( 'id', $response->get_data() );
-		$this->assertArrayHasKey( 'name', $response->get_data() );
-		$this->assertArrayHasKey( 'variation', $response->get_data() );
-		$this->assertArrayHasKey( 'permalink', $response->get_data() );
-		$this->assertArrayHasKey( 'description', $response->get_data() );
-		$this->assertArrayHasKey( 'on_sale', $response->get_data() );
-		$this->assertArrayHasKey( 'sku', $response->get_data() );
-		$this->assertArrayHasKey( 'prices', $response->get_data() );
-		$this->assertArrayHasKey( 'average_rating', $response->get_data() );
-		$this->assertArrayHasKey( 'review_count', $response->get_data() );
-		$this->assertArrayHasKey( 'images', $response->get_data() );
-		$this->assertArrayHasKey( 'has_options', $response->get_data() );
-		$this->assertArrayHasKey( 'is_purchasable', $response->get_data() );
-		$this->assertArrayHasKey( 'is_in_stock', $response->get_data() );
-		$this->assertArrayHasKey( 'add_to_cart', $response->get_data() );
+		$this->assertArrayHasKey( 'id', $data );
+		$this->assertArrayHasKey( 'name', $data );
+		$this->assertArrayHasKey( 'variation', $data );
+		$this->assertArrayHasKey( 'permalink', $data );
+		$this->assertArrayHasKey( 'description', $data );
+		$this->assertArrayHasKey( 'on_sale', $data );
+		$this->assertArrayHasKey( 'sku', $data );
+		$this->assertArrayHasKey( 'prices', $data );
+		$this->assertArrayHasKey( 'average_rating', $data );
+		$this->assertArrayHasKey( 'review_count', $data );
+		$this->assertArrayHasKey( 'images', $data );
+		$this->assertArrayHasKey( 'has_options', $data );
+		$this->assertArrayHasKey( 'is_purchasable', $data );
+		$this->assertArrayHasKey( 'is_in_stock', $data );
+		$this->assertArrayHasKey( 'add_to_cart', $data );
 	}
 
 	/**
@@ -170,4 +184,17 @@ class Products extends TestCase {
 		$this->assertArrayHasKey( 'catalog_visibility', $params );
 		$this->assertArrayHasKey( 'rating', $params );
 	}
+
+	/**
+	 * Test schema matches responses.
+	 */
+	public function test_schema_matches_response() {
+		$controller = new \Automattic\WooCommerce\Blocks\RestApi\StoreApi\Controllers\Products();
+		$response   = $controller->prepare_item_for_response( $this->products[0], [] );
+		$schema     = $controller->get_item_schema();
+		$validate   = new ValidateSchema( $schema );
+
+		$diff = $validate->get_diff_from_object( $response->get_data() );
+		$this->assertEmpty( $diff, print_r( $diff, true ) );
+	}
 }