core/modules/rest/src/Tests/PageCacheTest.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/modules/rest/src/Tests/PageCacheTest.php b/core/modules/rest/src/Tests/PageCacheTest.php
index 1901012..b2342b9 100644
--- a/core/modules/rest/src/Tests/PageCacheTest.php
+++ b/core/modules/rest/src/Tests/PageCacheTest.php
@@ -91,7 +91,7 @@ public function testConfigChangePageCache() {
     // Trigger a resource config save which should clear the page cache, so we
     // should get a cache miss now for the same request.
     $this->resourceConfigStorage->load('entity__entity_test')->save();
-    $this->httpRequest($entity->urlInfo()->setRouteParameter('_format', $this->defaultFormat), 'GET', NULL, $this->defaultMimeType);
+    $this->httpRequest($url, 'GET', NULL, $this->defaultMimeType);
     $this->assertResponse(200, 'HTTP response code is correct.');
     $this->assertHeader('x-drupal-cache', 'MISS');
     $this->assertCacheTag('config:rest.resource.entity__entity_test');