diff --git a/tests/phpunit/tests/rest-api/rest-post-meta-fields.php b/tests/phpunit/tests/rest-api/rest-post-meta-fields.php
index 4c0726b67d..255dfd797b 100644
--- a/tests/phpunit/tests/rest-api/rest-post-meta-fields.php
+++ b/tests/phpunit/tests/rest-api/rest-post-meta-fields.php
@@ -393,6 +393,8 @@ class WP_Test_REST_Post_Meta_Fields extends WP_Test_REST_TestCase {
 		$response = $this->server->dispatch( $request );
 		remove_filter( 'query', array( $this, 'error_insert_query' ) );
 		$wpdb->show_errors = true;
+
+		$this->assertErrorResponse( 'rest_meta_database_error', $response, 500 );
 	}
 
 	public function test_set_value_invalid_type() {
diff --git a/tests/phpunit/tests/rest-api/rest-post-statuses-controller.php b/tests/phpunit/tests/rest-api/rest-post-statuses-controller.php
index 633c087d58..db35fd18bf 100644
--- a/tests/phpunit/tests/rest-api/rest-post-statuses-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-post-statuses-controller.php
@@ -101,14 +101,23 @@ class WP_Test_REST_Post_Statuses_Controller extends WP_Test_REST_Controller_Test
 
 	public function test_create_item() {
 		/** Post statuses can't be created **/
+		$request = new WP_REST_Request( 'POST', '/wp/v2/statuses' );
+		$response = $this->server->dispatch( $request );
+		$this->assertEquals( 404, $response->get_status() );
 	}
 
 	public function test_update_item() {
 		/** Post statuses can't be updated **/
+		$request = new WP_REST_Request( 'POST', '/wp/v2/statuses/draft' );
+		$response = $this->server->dispatch( $request );
+		$this->assertEquals( 404, $response->get_status() );
 	}
 
 	public function test_delete_item() {
 		/** Post statuses can't be deleted **/
+		$request = new WP_REST_Request( 'DELETE', '/wp/v2/statuses/draft' );
+		$response = $this->server->dispatch( $request );
+		$this->assertEquals( 404, $response->get_status() );
 	}
 
 	public function test_prepare_item() {
diff --git a/tests/phpunit/tests/rest-api/rest-post-types-controller.php b/tests/phpunit/tests/rest-api/rest-post-types-controller.php
index b0bdd8c9ae..7919aa1908 100644
--- a/tests/phpunit/tests/rest-api/rest-post-types-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-post-types-controller.php
@@ -95,14 +95,23 @@ class WP_Test_REST_Post_Types_Controller extends WP_Test_REST_Controller_Testcas
 
 	public function test_create_item() {
 		/** Post types can't be created **/
+		$request = new WP_REST_Request( 'POST', '/wp/v2/types' );
+		$response = $this->server->dispatch( $request );
+		$this->assertEquals( 404, $response->get_status() );
 	}
 
 	public function test_update_item() {
 		/** Post types can't be updated **/
+		$request = new WP_REST_Request( 'POST', '/wp/v2/types/post' );
+		$response = $this->server->dispatch( $request );
+		$this->assertEquals( 404, $response->get_status() );
 	}
 
 	public function test_delete_item() {
 		/** Post types can't be deleted **/
+		$request = new WP_REST_Request( 'DELETE', '/wp/v2/types/post' );
+		$response = $this->server->dispatch( $request );
+		$this->assertEquals( 404, $response->get_status() );
 	}
 
 	public function test_prepare_item() {
diff --git a/tests/phpunit/tests/rest-api/rest-taxonomies-controller.php b/tests/phpunit/tests/rest-api/rest-taxonomies-controller.php
index 00aa196fba..22b2a0bcbf 100644
--- a/tests/phpunit/tests/rest-api/rest-taxonomies-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-taxonomies-controller.php
@@ -111,14 +111,23 @@ class WP_Test_REST_Taxonomies_Controller extends WP_Test_REST_Controller_Testcas
 
 	public function test_create_item() {
 		/** Taxonomies can't be created **/
+		$request = new WP_REST_Request( 'POST', '/wp/v2/taxonomies' );
+		$response = $this->server->dispatch( $request );
+		$this->assertEquals( 404, $response->get_status() );
 	}
 
 	public function test_update_item() {
 		/** Taxonomies can't be updated **/
+		$request = new WP_REST_Request( 'POST', '/wp/v2/taxonomies/category' );
+		$response = $this->server->dispatch( $request );
+		$this->assertEquals( 404, $response->get_status() );
 	}
 
 	public function test_delete_item() {
 		/** Taxonomies can't be deleted **/
+		$request = new WP_REST_Request( 'DELETE', '/wp/v2/taxonomies/category' );
+		$response = $this->server->dispatch( $request );
+		$this->assertEquals( 404, $response->get_status() );
 	}
 
 	public function test_prepare_item() {