diff --git a/plugins/woocommerce/changelog/update-audit-rule-processors b/plugins/woocommerce/changelog/update-audit-rule-processors
new file mode 100644
index 00000000000..2220dbe10b1
--- /dev/null
+++ b/plugins/woocommerce/changelog/update-audit-rule-processors
@@ -0,0 +1,4 @@
+Significance: patch
+Type: dev
+
+Add checks and unit tests to rule processors
diff --git a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/BaseLocationCountryRuleProcessor.php b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/BaseLocationCountryRuleProcessor.php
index 941233ae800..366c6699885 100644
--- a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/BaseLocationCountryRuleProcessor.php
+++ b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/BaseLocationCountryRuleProcessor.php
@@ -25,7 +25,11 @@ class BaseLocationCountryRuleProcessor implements RuleProcessorInterface {
 	 */
 	public function process( $rule, $stored_state ) {
 		$base_location = wc_get_base_location();
-		if ( ! $base_location ) {
+		if (
+			! is_array( $base_location ) ||
+			! array_key_exists( 'country', $base_location ) ||
+			! array_key_exists( 'state', $base_location )
+		) {
 			return false;
 		}
 
diff --git a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/BaseLocationStateRuleProcessor.php b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/BaseLocationStateRuleProcessor.php
index f2f70c3c4ab..52d7751b029 100644
--- a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/BaseLocationStateRuleProcessor.php
+++ b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/BaseLocationStateRuleProcessor.php
@@ -23,7 +23,7 @@ class BaseLocationStateRuleProcessor implements RuleProcessorInterface {
 	 */
 	public function process( $rule, $stored_state ) {
 		$base_location = wc_get_base_location();
-		if ( ! $base_location ) {
+		if ( ! is_array( $base_location ) || ! array_key_exists( 'state', $base_location ) ) {
 			return false;
 		}
 
diff --git a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/OnboardingProfileRuleProcessor.php b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/OnboardingProfileRuleProcessor.php
index e0686094744..b6ec890eb3f 100644
--- a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/OnboardingProfileRuleProcessor.php
+++ b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/OnboardingProfileRuleProcessor.php
@@ -25,7 +25,7 @@ class OnboardingProfileRuleProcessor implements RuleProcessorInterface {
 	public function process( $rule, $stored_state ) {
 		$onboarding_profile = get_option( 'woocommerce_onboarding_profile' );
 
-		if ( empty( $onboarding_profile ) ) {
+		if ( empty( $onboarding_profile ) || ! is_array( $onboarding_profile ) ) {
 			return false;
 		}
 
diff --git a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PluginVersionRuleProcessor.php b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PluginVersionRuleProcessor.php
index e619c9d8d21..f564d9d432a 100644
--- a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PluginVersionRuleProcessor.php
+++ b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PluginVersionRuleProcessor.php
@@ -52,7 +52,7 @@ class PluginVersionRuleProcessor implements RuleProcessorInterface {
 
 		$plugin_data = $this->plugins_provider->get_plugin_data( $rule->plugin );
 
-		if ( ! $plugin_data ) {
+		if ( ! is_array( $plugin_data ) || ! array_key_exists( 'Version', $plugin_data ) ) {
 			return false;
 		}
 
diff --git a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PluginsActivatedRuleProcessor.php b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PluginsActivatedRuleProcessor.php
index 2da1698e890..18db3d45152 100644
--- a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PluginsActivatedRuleProcessor.php
+++ b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PluginsActivatedRuleProcessor.php
@@ -48,6 +48,14 @@ class PluginsActivatedRuleProcessor implements RuleProcessorInterface {
 		$active_plugin_slugs = $this->plugins_provider->get_active_plugin_slugs();
 
 		foreach ( $rule->plugins as $plugin_slug ) {
+			if ( ! is_string( $plugin_slug ) ) {
+				$logger = wc_get_logger();
+				$logger->warning(
+					__( 'Invalid plugin slug provided in the plugins activated rule.', 'woocommerce' )
+				);
+				return false;
+			}
+
 			if ( ! in_array( $plugin_slug, $active_plugin_slugs, true ) ) {
 				return false;
 			}
diff --git a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PublishAfterTimeRuleProcessor.php b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PublishAfterTimeRuleProcessor.php
index 24a0753fabb..75ad931400f 100644
--- a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PublishAfterTimeRuleProcessor.php
+++ b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PublishAfterTimeRuleProcessor.php
@@ -56,6 +56,12 @@ class PublishAfterTimeRuleProcessor implements RuleProcessorInterface {
 			return false;
 		}
 
+		try {
+			new \DateTime( $rule->publish_after );
+		} catch ( \Throwable $e ) {
+			return false;
+		}
+
 		return true;
 	}
 }
diff --git a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PublishBeforeTimeRuleProcessor.php b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PublishBeforeTimeRuleProcessor.php
index 77f11220483..9cde77c98b0 100644
--- a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PublishBeforeTimeRuleProcessor.php
+++ b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/PublishBeforeTimeRuleProcessor.php
@@ -56,6 +56,12 @@ class PublishBeforeTimeRuleProcessor implements RuleProcessorInterface {
 			return false;
 		}
 
+		try {
+			new \DateTime( $rule->publish_before );
+		} catch ( \Throwable $e ) {
+			return false;
+		}
+
 		return true;
 	}
 }
diff --git a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/TotalPaymentsVolumeProcessor.php b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/TotalPaymentsVolumeProcessor.php
index 13d103b1973..03f14eac586 100644
--- a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/TotalPaymentsVolumeProcessor.php
+++ b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/TotalPaymentsVolumeProcessor.php
@@ -23,17 +23,22 @@ class TotalPaymentsVolumeProcessor implements RuleProcessorInterface {
 	 * @return bool The result of the operation.
 	 */
 	public function process( $rule, $stored_state ) {
-		$dates      = TimeInterval::get_timeframe_dates( $rule->timeframe );
-		$reports_revenue = new RevenueQuery(
+		$dates           = TimeInterval::get_timeframe_dates( $rule->timeframe );
+		$reports_revenue = $this->get_reports_query(
 			array(
-				'before' => $dates['end'],
-				'after'  => $dates['start'],
+				'before'   => $dates['end'],
+				'after'    => $dates['start'],
 				'interval' => 'year',
-				'fields' => array( 'total_sales' ),
+				'fields'   => array( 'total_sales' ),
 			)
 		);
-		$report_data    = $reports_revenue->get_data();
-		$value          = $report_data->totals->total_sales;
+		$report_data     = $reports_revenue->get_data();
+
+		if ( ! $report_data || ! isset( $report_data->totals->total_sales ) ) {
+			return false;
+		}
+
+		$value = $report_data->totals->total_sales;
 
 		return ComparisonOperation::compare(
 			$value,
@@ -62,7 +67,7 @@ class TotalPaymentsVolumeProcessor implements RuleProcessorInterface {
 			return false;
 		}
 
-		if ( ! isset( $rule->value ) ) {
+		if ( ! isset( $rule->value ) || ! is_numeric( $rule->value ) ) {
 			return false;
 		}
 
@@ -72,4 +77,17 @@ class TotalPaymentsVolumeProcessor implements RuleProcessorInterface {
 
 		return true;
 	}
+
+	/**
+	 * Get the report query.
+	 *
+	 * @param array $args The query args.
+	 *
+	 * @return RevenueQuery The report query.
+	 */
+	protected function get_reports_query( $args ) {
+		return new RevenueQuery(
+			$args
+		);
+	}
 }
diff --git a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/WCAdminActiveForRuleProcessor.php b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/WCAdminActiveForRuleProcessor.php
index 4476d86b667..afb6195702c 100644
--- a/plugins/woocommerce/src/Admin/RemoteInboxNotifications/WCAdminActiveForRuleProcessor.php
+++ b/plugins/woocommerce/src/Admin/RemoteInboxNotifications/WCAdminActiveForRuleProcessor.php
@@ -43,7 +43,12 @@ class WCAdminActiveForRuleProcessor implements RuleProcessorInterface {
 	 */
 	public function process( $rule, $stored_state ) {
 		$active_for_seconds = $this->wcadmin_active_for_provider->get_wcadmin_active_for_in_seconds();
-		$rule_seconds       = $rule->days * DAY_IN_SECONDS;
+
+		if ( ! $active_for_seconds || ! is_numeric( $active_for_seconds ) || $active_for_seconds < 0 ) {
+			return false;
+		}
+
+		$rule_seconds = $rule->days * DAY_IN_SECONDS;
 
 		return ComparisonOperation::compare(
 			$active_for_seconds,
@@ -60,7 +65,8 @@ class WCAdminActiveForRuleProcessor implements RuleProcessorInterface {
 	 * @return bool Pass/fail.
 	 */
 	public function validate( $rule ) {
-		if ( ! isset( $rule->days ) ) {
+		// Ensure that 'days' property is set and is a valid numeric value.
+		if ( ! isset( $rule->days ) || ! is_numeric( $rule->days ) || $rule->days < 0 ) {
 			return false;
 		}
 
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/base-location-country-rule-processor.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/base-location-country-rule-processor.php
index d38cf1d00ba..ded865a4e39 100644
--- a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/base-location-country-rule-processor.php
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/base-location-country-rule-processor.php
@@ -9,7 +9,7 @@ use Automattic\WooCommerce\Admin\RemoteInboxNotifications\BaseLocationCountryRul
 use Automattic\WooCommerce\Internal\Admin\Onboarding\OnboardingProfile;
 
 /**
- * class WC_Admin_Tests_RemoteInboxNotifications_PublishBeforeTimeRuleProcessor
+ * class WC_Admin_Tests_RemoteInboxNotifications_BaseLocationCountryRuleProcessor
  */
 class WC_Admin_Tests_RemoteInboxNotifications_BaseLocationCountryRuleProcessor extends WC_Unit_Test_Case {
 	/**
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/base-location-state-rule-processor.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/base-location-state-rule-processor.php
new file mode 100644
index 00000000000..04fdd11f310
--- /dev/null
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/base-location-state-rule-processor.php
@@ -0,0 +1,68 @@
+<?php
+/**
+ * Base Location state rule processor tests.
+ *
+ * @package WooCommerce\Admin\Tests\RemoteInboxNotifications
+ */
+
+use Automattic\WooCommerce\Admin\RemoteInboxNotifications\BaseLocationStateRuleProcessor;
+use Automattic\WooCommerce\Internal\Admin\Onboarding\OnboardingProfile;
+
+/**
+ * class WC_Admin_Tests_RemoteInboxNotifications_BaseLocationStateRuleProcessor
+ */
+class WC_Admin_Tests_RemoteInboxNotifications_BaseLocationStateRuleProcessor extends WC_Unit_Test_Case {
+
+	/**
+	 * Get the base_location_state rule.
+	 *
+	 * @return object The rule.
+	 */
+	private function get_rule() {
+		return json_decode(
+			'{
+				"type": "base_location_state",
+				"operation": "=",
+				"value": "CA"
+			}'
+		);
+	}
+
+	/**
+	 * Tear down.
+	 */
+	public function tearDown(): void {
+		parent::tearDown();
+		update_option( 'woocommerce_store_address', '' );
+		update_option( 'woocommerce_default_country', 'US:CA' );
+		update_option( OnboardingProfile::DATA_OPTION, array() );
+	}
+
+	/**
+	 * Tests that the processor returns false if country is not set.
+	 *
+	 * @group fast
+	 */
+	public function test_spec_fails_if_country_is_not_set() {
+		update_option( 'woocommerce_default_country', '' );
+
+		$processor = new BaseLocationStateRuleProcessor();
+		$result    = $processor->process( $this->get_rule(), new stdClass() );
+
+		$this->assertEquals( false, $result );
+	}
+
+	/**
+	 * Tests that the processor returns true if location is the same.
+	 *
+	 * @group fast
+	 */
+	public function test_spec_passes_if_location_is_the_same() {
+		update_option( 'woocommerce_default_country', 'US:CA' );
+
+		$processor = new BaseLocationStateRuleProcessor();
+		$result    = $processor->process( $this->get_rule(), new stdClass() );
+
+		$this->assertEquals( true, $result );
+	}
+}
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/is-woo-express-rule-processor.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/is-woo-express-rule-processor.php
new file mode 100644
index 00000000000..0f1f52f7ea5
--- /dev/null
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/is-woo-express-rule-processor.php
@@ -0,0 +1,112 @@
+<?php
+/**
+ * Is WooExpress rule processor tests.
+ *
+ * @package WooCommerce\Admin\Tests\RemoteInboxNotifications
+ */
+
+use Automattic\WooCommerce\Admin\RemoteInboxNotifications\IsWooExpressRuleProcessor;
+
+/**
+ * class WC_Admin_Tests_RemoteInboxNotifications_IsWooExpressRuleProcessor
+ */
+class WC_Admin_Tests_RemoteInboxNotifications_IsWooExpressRuleProcessor extends WC_Unit_Test_Case {
+	/**
+	 * Set Up Before Class.
+	 */
+	public static function setUpBeforeClass(): void {
+		/**
+		 * Fake function wc_calypso_bridge_is_woo_express_plan so that we can test the processor.
+		 */
+		function wc_calypso_bridge_is_woo_express_plan() {
+			return apply_filters( 'test_wc_calypso_bridge_is_woo_express_plan', true ); // phpcs:ignore WooCommerce.Commenting.CommentHooks.MissingHookComment
+		}
+	}
+
+	/**
+	 * Tear down.
+	 */
+	public function tearDown(): void {
+		parent::tearDown();
+		remove_all_filters( 'test_wc_calypso_bridge_is_woo_express_plan' );
+	}
+
+	/**
+	 * Get the is_woo_express rule.
+	 *
+	 * @return object The rule.
+	 */
+	private function get_rule() {
+		return json_decode(
+			'{
+					"type": "is_woo_express",
+					"value": true
+			}'
+		);
+	}
+
+	/**
+	 * Test that the processor returns true if the site is on a Woo Express plan.
+	 * @group fast
+	 */
+	public function test_is_woo_express_plan() {
+		add_filter( 'test_wc_calypso_bridge_is_woo_express_plan', '__return_true' );
+
+		$processor = new IsWooExpressRuleProcessor();
+		$result    = $processor->process( $this->get_rule(), new stdClass() );
+
+		$this->assertEquals( true, $result );
+	}
+
+	/**
+	 * Test that the processor returns false if the site is not on a Woo Express plan.
+	 * @group fast
+	 */
+	public function test_is_not_woo_express_plan() {
+		add_filter( 'test_wc_calypso_bridge_is_woo_express_plan', '__return_false' );
+
+		$processor = new IsWooExpressRuleProcessor();
+		$result    = $processor->process( $this->get_rule(), new stdClass() );
+
+		$this->assertEquals( false, $result );
+	}
+
+	/**
+	 * Test that the processor returns false if plan name is not defined.
+	 * @group fast
+	 */
+	public function test_invalid_plan_name() {
+		$rule = (object) array(
+			'type'  => 'is_woo_express',
+			'value' => true,
+			'plan'  => 'invalid_plan',
+		);
+
+		$processor = new IsWooExpressRuleProcessor();
+		$result    = $processor->process( $rule, new stdClass() );
+
+		$this->assertEquals( false, $result );
+	}
+
+	/**
+	 * Test that the processor returns true if it's a trial plan.
+	 * @group fast
+	 */
+	public function test_is_trial_plan() {
+		/** Fake function wc_calypso_bridge_is_woo_express_trial_plan. */
+		function wc_calypso_bridge_is_woo_express_trial_plan() {
+			return true;
+		}
+
+		$processor = new IsWooExpressRuleProcessor();
+
+		$rule = (object) array(
+			'type'  => 'is_woo_express',
+			'value' => true,
+			'plan'  => 'trial',
+		);
+
+		$result = $processor->process( $rule, new stdClass() );
+		$this->assertEquals( true, $result );
+	}
+}
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/onboarding-profile-rule-processor.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/onboarding-profile-rule-processor.php
new file mode 100644
index 00000000000..576abb10b6f
--- /dev/null
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/onboarding-profile-rule-processor.php
@@ -0,0 +1,78 @@
+<?php
+/**
+ * Onboarding profile rule processor tests.
+ *
+ * @package WooCommerce\Admin\Tests\RemoteInboxNotifications
+ */
+
+use Automattic\WooCommerce\Admin\RemoteInboxNotifications\OnboardingProfileRuleProcessor;
+use Automattic\WooCommerce\Internal\Admin\Onboarding\OnboardingProfile;
+
+/**
+ * class WC_Admin_Tests_RemoteInboxNotifications_OnboardingProfileRuleProcessor
+ */
+class WC_Admin_Tests_RemoteInboxNotifications_OnboardingProfileRuleProcessor extends WC_Unit_Test_Case {
+	/**
+	 * Get the publish_before rule.
+	 *
+	 * @return object The rule.
+	 */
+	private function get_rule() {
+		return json_decode(
+			'{
+				"type": "onboarding_profile",
+				"index": "business_choice",
+				"operation": "=",
+				"value": "im_already_selling"
+			}'
+		);
+	}
+
+	/**
+	 * Tear down.
+	 */
+	public function tearDown(): void {
+		parent::tearDown();
+		update_option( OnboardingProfile::DATA_OPTION, array() );
+	}
+
+	/**
+	 * Tests that the processor returns false if onboarding profile is empty.
+	 *
+	 * @group fast
+	 */
+	public function test_spec_fails_if_on_boarding_profile_is_empty() {
+		$processor = new OnboardingProfileRuleProcessor();
+		$result    = $processor->process( $this->get_rule(), new stdClass() );
+
+		$this->assertEquals( false, $result );
+	}
+
+	/**
+	 * Tests that the processor returns false if onboarding profile is not an array.
+	 *
+	 * @group fast
+	 */
+	public function test_spec_fails_if_on_boarding_profile_is_not_an_array() {
+		update_option( OnboardingProfile::DATA_OPTION, 'not an array' );
+
+		$processor = new OnboardingProfileRuleProcessor();
+		$result    = $processor->process( $this->get_rule(), new stdClass() );
+
+		$this->assertEquals( false, $result );
+	}
+
+	/**
+	 * Tests that the processor returns true if the criteria is not met.
+	 *
+	 * @group fast
+	 */
+	public function test_spec_passes_if_criteria_is_met() {
+		update_option( OnboardingProfile::DATA_OPTION, array( 'business_choice' => 'im_already_selling' ) );
+
+		$processor = new OnboardingProfileRuleProcessor();
+		$result    = $processor->process( $this->get_rule(), new stdClass() );
+
+		$this->assertEquals( true, $result );
+	}
+}
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/plugin-version-rule-processor.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/plugin-version-rule-processor.php
index 7ae0573213b..fdf687b69d1 100644
--- a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/plugin-version-rule-processor.php
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/plugin-version-rule-processor.php
@@ -60,6 +60,35 @@ class WC_Admin_Tests_RemoteInboxNotifications_PluginVersionRuleProcessor extends
 		$this->assertEquals( false, $result );
 	}
 
+	/**
+	 * Test that the processor does not pass if plugin version does not exist in the data.
+	 * @group fast
+	 */
+	public function test_spec_does_not_pass_if_plugin_version_does_not_exist() {
+		$mock_plugins_provider = new MockPluginsProvider(
+			array(
+				'jetpack',
+			),
+			array(
+				'jetpack/jetpack.php' => array(
+					'name' => 'jetpack',
+				),
+			)
+		);
+		$processor             = new PluginVersionRuleProcessor( $mock_plugins_provider );
+		$rule                  = json_decode(
+			'{
+				"type": "plugin_version",
+				"plugin": "jetpack",
+				"version": "1.2.3",
+				"operator": "="
+			}'
+		);
+
+		$result = $processor->process( $rule, new stdClass() );
+		$this->assertEquals( false, $result );
+	}
+
 	/**
 	 * Test that the processor does not pass if the installed version is less
 	 * than the required version.
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/plugins-activated-rule-processor.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/plugins-activated-rule-processor.php
index ab3e1dbb240..2a32ae241c7 100644
--- a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/plugins-activated-rule-processor.php
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/plugins-activated-rule-processor.php
@@ -113,6 +113,35 @@ class WC_Admin_Tests_RemoteInboxNotifications_PluginsActivatedRuleProcessor exte
 		$this->assertEquals( false, $result );
 	}
 
+	/**
+	 * Tests that the processor does not pass a plugins_activated rule when
+	 * plugin slug is invalid.
+	 *
+	 * @group fast
+	 */
+	public function test_spec_does_not_pass_with_invalid_plugin_slug() {
+		$mock_plugins_provider = new MockPluginsProvider(
+			array(
+				'plugin-slug-1',
+				'plugin-slug-2',
+			)
+		);
+		$processor             = new PluginsActivatedRuleProcessor( $mock_plugins_provider );
+		$rule                  = json_decode(
+			'{
+				"type": "plugins_activated",
+				"plugins": [
+					{},
+					1
+				]
+			}'
+		);
+
+		$result = $processor->process( $rule, new stdClass() );
+
+		$this->assertEquals( false, $result );
+	}
+
 	/**
 	 * Tests that the processor passes a plugins_activated rule with both
 	 * matching plugins.
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/publish-after-time-rule-processor.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/publish-after-time-rule-processor.php
index 6ad2d288b5a..7bd30432c63 100644
--- a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/publish-after-time-rule-processor.php
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/publish-after-time-rule-processor.php
@@ -76,4 +76,23 @@ class WC_Admin_Tests_RemoteInboxNotifications_PublishAfterTimeRuleProcessor exte
 
 		$this->assertEquals( false, $result );
 	}
+
+	/**
+	 * Tests that the rule validation fails if publish_after_time is not in a valid date time format.
+	 *
+	 * @group fast
+	 */
+	public function test_spec_fails_for_invalid_date_time_format() {
+		$processor = new PublishAfterTimeRuleProcessor();
+
+		$rules  = json_decode(
+			'{
+				"type": "publish_after_time",
+				"publish_after": "wrong-format"
+			}'
+		);
+		$result = $processor->validate( $rules );
+
+		$this->assertEquals( false, $result );
+	}
 }
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/publish-before-time-rule-processor.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/publish-before-time-rule-processor.php
index 3c1ead3f214..96d93d6a1a3 100644
--- a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/publish-before-time-rule-processor.php
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/publish-before-time-rule-processor.php
@@ -76,4 +76,23 @@ class WC_Admin_Tests_RemoteInboxNotifications_PublishBeforeTimeRuleProcessor ext
 
 		$this->assertEquals( false, $result );
 	}
+
+	/**
+	 * Tests that the rule validation fails if publish_before_time is not in a valid date time format.
+	 *
+	 * @group fast
+	 */
+	public function test_spec_fails_for_invalid_date_time_format() {
+		$processor = new PublishBeforeTimeRuleProcessor();
+
+		$rules  = json_decode(
+			'{
+				"type": "publish_before_time",
+				"publish_before": "wrong-format"
+			}'
+		);
+		$result = $processor->validate( $rules );
+
+		$this->assertEquals( false, $result );
+	}
 }
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/total-payments-volume-processor.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/total-payments-volume-processor.php
new file mode 100644
index 00000000000..a3c98ac4870
--- /dev/null
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/total-payments-volume-processor.php
@@ -0,0 +1,137 @@
+<?php
+/**
+ * Total payments volume processor tests.
+ *
+ * @package WooCommerce\Admin\Tests\RemoteInboxNotification
+ */
+
+use Automattic\WooCommerce\Admin\RemoteInboxNotifications\TotalPaymentsVolumeProcessor;
+use Automattic\WooCommerce\Admin\API\Reports\Revenue\Query as RevenueQuery;
+
+/**
+ * class WC_Admin_Tests_RemoteInboxNotifications_TotalPaymentsVolumeProcessor
+ */
+class WC_Admin_Tests_RemoteInboxNotifications_TotalPaymentsVolumeProcessor extends WC_Unit_Test_Case {
+
+	/**
+	 * Greater than 1000 total payments volume evaluates to false.
+	 *
+	 * @group fast
+	 */
+	public function test_total_payments_volume_greater_than_1000_evaluates_to_false() {
+		$mocked_query = $this->getMockBuilder( RevenueQuery::class )
+		->onlyMethods( array( 'get_data' ) )
+		->getMock();
+
+		$mocked_query->expects( $this->once() )
+		->method( 'get_data' )
+		->willReturn(
+			(object) array(
+				'totals' => (object) array(
+					'total_sales' => 1000,
+				),
+			)
+		);
+
+		$mock = $this->getMockBuilder( TotalPaymentsVolumeProcessor::class )
+			->onlyMethods( array( 'get_reports_query' ) )
+			->getMock();
+
+		$mock->expects( $this->once() )
+			->method( 'get_reports_query' )
+			->willReturn( $mocked_query );
+
+		$rule = json_decode(
+			'{
+				"type": "total_payments_value",
+				"operation": "<",
+				"timeframe": "last_month",
+				"value": 1000
+			}'
+		);
+
+		$result = $mock->process( $rule, new stdClass() );
+
+		$this->assertEquals( false, $result );
+	}
+
+	/**
+	 * Less than 1000 total payments volume evaluates to true.
+	 *
+	 * @group fast
+	 */
+	public function test_total_payments_volume_less_than_1000_evaluates_to_false() {
+		$mocked_query = $this->getMockBuilder( RevenueQuery::class )
+		->onlyMethods( array( 'get_data' ) )
+		->getMock();
+
+		$mocked_query->expects( $this->once() )
+		->method( 'get_data' )
+		->willReturn(
+			(object) array(
+				'totals' => (object) array(
+					'total_sales' => 999,
+				),
+			)
+		);
+
+		$mock = $this->getMockBuilder( TotalPaymentsVolumeProcessor::class )
+			->onlyMethods( array( 'get_reports_query' ) )
+			->getMock();
+
+		$mock->expects( $this->once() )
+			->method( 'get_reports_query' )
+			->willReturn( $mocked_query );
+
+		$rule = json_decode(
+			'{
+				"type": "total_payments_value",
+				"operation": "<",
+				"timeframe": "last_month",
+				"value": 1000
+			}'
+		);
+
+		$result = $mock->process( $rule, new stdClass() );
+
+		$this->assertEquals( true, $result );
+	}
+
+	/**
+	 * Invalid report data evaluates to false.
+	 *
+	 * @group fast
+	 */
+	public function test_invalid_report_data_evaluates_to_false() {
+		$mocked_query = $this->getMockBuilder( RevenueQuery::class )
+		->onlyMethods( array( 'get_data' ) )
+		->getMock();
+
+		$mocked_query->expects( $this->once() )
+		->method( 'get_data' )
+		->willReturn(
+			(object) array()
+		);
+
+		$mock = $this->getMockBuilder( TotalPaymentsVolumeProcessor::class )
+			->onlyMethods( array( 'get_reports_query' ) )
+			->getMock();
+
+		$mock->expects( $this->once() )
+			->method( 'get_reports_query' )
+			->willReturn( $mocked_query );
+
+		$rule = json_decode(
+			'{
+				"type": "total_payments_value",
+				"operation": "<",
+				"timeframe": "last_month",
+				"value": 1000
+			}'
+		);
+
+		$result = $mock->process( $rule, new stdClass() );
+
+		$this->assertEquals( false, $result );
+	}
+}
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/wcadmin-active-for-rule-processor.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/wcadmin-active-for-rule-processor.php
index b8f0463d61b..2b994a1aa79 100644
--- a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/wcadmin-active-for-rule-processor.php
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/wcadmin-active-for-rule-processor.php
@@ -54,4 +54,115 @@ class WC_Admin_Tests_RemoteInboxNotifications_WCAdminActiveForRuleProcessor exte
 
 		$this->assertEquals( false, $result );
 	}
+
+	/**
+	 * Invalid value returns false
+	 *
+	 * @dataProvider data_provider_for_invalid_admin_active_for
+	 * @group fast
+	 * @param mixed $wcadmin_active_for WCAdmin active for value.
+	 *
+	 */
+	public function test_admin_active_for_provider_returns_invalid_value( $wcadmin_active_for ) {
+		$mocked = $this->getMockBuilder( MockWCAdminActiveForProvider::class )->getMock();
+		$mocked
+			->expects( $this->once() )
+			->method( 'get_wcadmin_active_for_in_seconds' )
+			->willReturn( $wcadmin_active_for );
+
+		$processor = new WCAdminActiveForRuleProcessor( $mocked );
+		$rule      = json_decode(
+			'{
+				"type": "wcadmin_active_for",
+				"operation": ">",
+				"days": 12
+			}'
+		);
+
+		$result = $processor->process( $rule, new stdClass() );
+
+		$this->assertEquals( false, $result );
+	}
+
+	/**
+	 * Data provider for invalid admin active for.
+	 */
+	public function data_provider_for_invalid_admin_active_for() {
+		return array(
+			array( null ),
+			array( 'invalid' ),
+			array( array() ),
+			array( -1 ),
+			array( '-10' ),
+		);
+	}
+
+	/**
+	 * Valid rule returns true
+	 *
+	 * @group fast
+	 */
+	public function test_valid_rule() {
+		$processor = new WCAdminActiveForRuleProcessor();
+		$rule      = json_decode(
+			'{
+				"type": "wcadmin_active_for",
+				"operation": ">",
+				"days": 12
+			}'
+		);
+
+		$result = $processor->validate( $rule );
+
+		$this->assertEquals( true, $result );
+	}
+
+	/**
+	 * Invalid rule returns false
+	 *
+	 * @dataProvider data_provider_for_invalid_rule
+	 * @group fast
+	 * @param mixed $rule Rule.
+	 */
+	public function test_invalid_rule( $rule ) {
+		$processor = new WCAdminActiveForRuleProcessor();
+		$result    = $processor->validate( $rule );
+
+		$this->assertEquals( false, $result );
+	}
+
+	/**
+	 * Data provider for invalid rule
+	 */
+	public function data_provider_for_invalid_rule() {
+		return array(
+			array(
+				json_decode(
+					'{
+						"type": "wcadmin_active_for",
+						"operation": ">",
+						"days": -1
+					}'
+				),
+			),
+			array(
+				json_decode(
+					'{
+						"type": "wcadmin_active_for",
+						"operation": ">",
+						"days": null
+					}'
+				),
+			),
+			array(
+				json_decode(
+					'{
+						"type": "wcadmin_active_for",
+						"operation": ">",
+						"days": "wrong type"
+					}'
+				),
+			),
+		);
+	}
 }