diff --git a/core/modules/page_cache/tests/src/Functional/PageCacheTest.php b/core/modules/page_cache/tests/src/Functional/PageCacheTest.php
index 4d30d843..439f3484 100644
--- a/core/modules/page_cache/tests/src/Functional/PageCacheTest.php
+++ b/core/modules/page_cache/tests/src/Functional/PageCacheTest.php
@@ -552,8 +552,8 @@ public function testHead() {
     // HEAD, then GET.
     $url_b = $this->buildUrl('system-test/set-header', ['query' => ['name' => 'Foo', 'value' => 'baz']]);
     $response = $client->request('HEAD', $url_b);
-    $this->assertSession()->responseHeaderEquals('X-Drupal-Cache', 'MISS');
-    $this->assertSession()->responseHeaderEquals('Foo', 'baz');
+    $this->assertEqual($response->getHeaderLine('X-Drupal-Cache'), 'MISS', 'Page was not cached.');
+    $this->assertEqual($response->getHeaderLine('Foo'), 'baz', 'Custom header was sent.');
     $this->assertEqual('', $response->getBody()->getContents());
     $response_body = $this->drupalGet($url_b);
     $this->assertSession()->responseHeaderEquals('X-Drupal-Cache', 'HIT');