diff --git a/plugins/woocommerce/src/Caching/WPCacheEngine.php b/plugins/woocommerce/src/Caching/WPCacheEngine.php
index 3bc65c23aa7..55373195f50 100644
--- a/plugins/woocommerce/src/Caching/WPCacheEngine.php
+++ b/plugins/woocommerce/src/Caching/WPCacheEngine.php
@@ -34,7 +34,7 @@ class WPCacheEngine implements CacheEngine {
 	 */
 	public function cache_object( string $key, $object, int $expiration, string $group = '' ): bool {
 		$prefixed_key = self::get_prefixed_key( $key, $group );
-		return wp_cache_set( $prefixed_key, $object, $group, $expiration );
+		return false !== wp_cache_set( $prefixed_key, $object, $group, $expiration );
 	}
 
 	/**
@@ -47,7 +47,7 @@ class WPCacheEngine implements CacheEngine {
 	 */
 	public function delete_cached_object( string $key, string $group = '' ): bool {
 		$prefixed_key = self::get_prefixed_key( $key, $group );
-		return wp_cache_delete( $prefixed_key, $group );
+		return false !== wp_cache_delete( $prefixed_key, $group );
 	}
 
 	/**
@@ -71,6 +71,6 @@ class WPCacheEngine implements CacheEngine {
 	 * @return bool True if the group is deleted successfully, false otherwise.
 	 */
 	public function delete_cache_group( string $group = '' ): bool {
-		return self::invalidate_cache_group( $group );
+		return false !== self::invalidate_cache_group( $group );
 	}
 }
diff --git a/plugins/woocommerce/tests/php/src/Caching/WPCacheEngineTest.php b/plugins/woocommerce/tests/php/src/Caching/WPCacheEngineTest.php
new file mode 100644
index 00000000000..e2e4f24390e
--- /dev/null
+++ b/plugins/woocommerce/tests/php/src/Caching/WPCacheEngineTest.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace Automattic\WooCommerce\Tests\Caching;
+
+use Automattic\WooCommerce\Caching\WPCacheEngine;
+
+/**
+ * Tests for WPCacheEngine.
+ */
+class WPCacheEngineTest extends \WC_Unit_Test_Case {
+
+	/**
+	 * System under test.
+	 *
+	 * @var WPCacheEngine
+	 */
+	private $sut;
+
+	/**
+	 * Setup test.
+	 */
+	public function setUp(): void {
+		parent::setUp();
+		$this->sut = wc_get_container()->get( WPCacheEngine::class );
+	}
+
+	/**
+	 * @testDox Test that the cache engine can be used to cache and retrieve objects.
+	 */
+	public function test_caching_crud() {
+		$object_to_cache        = new \stdClass();
+		$object_to_cache->prop1 = 'dummy_value_1';
+		$object_to_cache->prop2 = 'dummy_value_2';
+		$key                    = 'dummy_object_key';
+		$group                  = 'dummy_group';
+
+		$this->assertFalse( $this->sut->is_cached( $key, $group ) );
+		$this->sut->cache_object( $key, $object_to_cache, HOUR_IN_SECONDS, $group );
+		$this->assertTrue( $this->sut->is_cached( $key, $group ) );
+
+		$cached_obj = $this->sut->get_cached_object( $key, $group );
+		$this->assertEquals( $object_to_cache->prop1, $cached_obj->prop1 );
+		$this->assertEquals( $object_to_cache->prop2, $cached_obj->prop2 );
+
+		$this->sut->delete_cached_object( $key, $group );
+		$this->assertFalse( $this->sut->is_cached( $key, $group ) );
+		$this->assertNull( ( $this->sut->get_cached_object( $key, $group ) ) );
+
+		$this->sut->cache_object( $key, $object_to_cache, HOUR_IN_SECONDS, $group );
+		$this->assertTrue( $this->sut->is_cached( $key, $group ) );
+		$this->sut->delete_cache_group( $group );
+		$this->assertFalse( $this->sut->is_cached( $key, $group ) );
+		$this->assertNull( ( $this->sut->get_cached_object( $group ) ) );
+	}
+
+}