core/modules/rest/tests/src/Kernel/RequestHandlerTest.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/modules/rest/tests/src/Kernel/RequestHandlerTest.php b/core/modules/rest/tests/src/Kernel/RequestHandlerTest.php
index 8420d83..39820d8 100644
--- a/core/modules/rest/tests/src/Kernel/RequestHandlerTest.php
+++ b/core/modules/rest/tests/src/Kernel/RequestHandlerTest.php
@@ -81,6 +81,7 @@ public function testBaseHandler() {
     $this->assertEquals($response, $handler_response);
 
     // We will call the patch method this time.
+    $route_match = new RouteMatch('test', new Route('/rest/test', ['_rest_resource_config' => 'restplugin'], ['_content_type_format' => 'json']));
     $request->setMethod('PATCH');
     $response = new ResourceResponse([]);
     $resource->patch(NULL, $request)