diff --git a/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php b/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
index e9d9c48..dfd74c7 100644
--- a/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
+++ b/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
@@ -607,7 +607,8 @@ public function testPost() {
     // 201 for well-formed request.
     $response = $this->request('POST', $url, $request_options);
     $this->assertResourceResponse(201, FALSE, $response);
-    $this->assertSame([str_replace($this->entity->id(), static::$firstCreatedEntityId, $this->entity->toUrl('canonical')->setAbsolute(TRUE)->toString())], $response->getHeader('Location'));
+    $location = $this->entityStorage->load(static::$firstCreatedEntityId)->toUrl('canonical')->setAbsolute(TRUE)->toString();
+    $this->assertSame([$location], $response->getHeader('Location'));
     $this->assertFalse($response->hasHeader('X-Drupal-Cache'));
 
 
@@ -629,7 +630,8 @@ public function testPost() {
     // 201 for well-formed request.
     $response = $this->request('POST', $url, $request_options);
     $this->assertResourceResponse(201, FALSE, $response);
-    $this->assertSame([str_replace($this->entity->id(), static::$secondCreatedEntityId, $this->entity->toUrl('canonical')->setAbsolute(TRUE)->toString())], $response->getHeader('Location'));
+    $location = $this->entityStorage->load(static::$secondCreatedEntityId)->toUrl('canonical')->setAbsolute(TRUE)->toString();
+    $this->assertSame([$location], $response->getHeader('Location'));
     $this->assertFalse($response->hasHeader('X-Drupal-Cache'));
   }