diff --git a/core/modules/rest/src/Tests/ReadTest.php b/core/modules/rest/src/Tests/ReadTest.php
index c730b89..9084f93 100644
--- a/core/modules/rest/src/Tests/ReadTest.php
+++ b/core/modules/rest/src/Tests/ReadTest.php
@@ -60,7 +60,9 @@ public function testRead() {
       // Try to read an entity that does not exist.
       $response = $this->httpRequest($entity_type . '/9999', 'GET', NULL, $this->defaultMimeType);
       $this->assertResponse(404);
-      $this->assertText(Json::encode(['A fatal error occurred: The "' . $entity_type . '" parameter was not converted for the path']), 'Response message is correct.');
+      $path = $entity_type == 'node' ? '/node/{node}' : '/entity_test/{entity_test}';
+      $expected_message = Json::encode(['A fatal error occurred: The "' . $entity_type . '" parameter was not converted for the path "' . $path . '" (route name: "rest.entity.' . $entity_type . '.GET.hal_json")']);
+      $this->assertIdentical($expected_message, $response, 'Response message is correct.');
 
       // Make sure that field level access works and that the according field is
       // not available in the response. Only applies to entity_test.
@@ -86,7 +88,8 @@ public function testRead() {
     $this->drupalLogin($account);
     $response = $this->httpRequest($account->getSystemPath(), 'GET', NULL, $this->defaultMimeType);
     $this->assertResponse(404);
-    $this->assertIdentical('{}', $response);
+    $expected_message = Json::encode(['A fatal error occurred: Unable to find the controller for path "/user/4". Maybe you forgot to add the matching route in your routing configuration?']);
+    $this->assertIdentical($expected_message, $response);
   }
 
   /**