diff --git a/core/modules/comment/src/Tests/Views/CommentRestExportTest.php b/core/modules/comment/src/Tests/Views/CommentRestExportTest.php
index ecf1a54..9737b4f 100644
--- a/core/modules/comment/src/Tests/Views/CommentRestExportTest.php
+++ b/core/modules/comment/src/Tests/Views/CommentRestExportTest.php
@@ -55,7 +55,7 @@ protected function setUp() {
    * Test comment row.
    */
   public function testCommentRestExport() {
-    $this->drupalGet(sprintf('node/%d/comments', $this->nodeUserCommented->id()), [], ['Accept' => 'application/hal+json']);
+    $this->drupalGetWithFormat(sprintf('node/%d/comments', $this->nodeUserCommented->id()), 'hal_json');
     $this->assertResponse(200);
     $contents = Json::decode($this->getRawContent());
     $this->assertEqual($contents[0]['subject'], 'How much wood would a woodchuck chuck');
diff --git a/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_rest.yml b/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_rest.yml
index 2de8cdb..6350455 100644
--- a/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_rest.yml
+++ b/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_rest.yml
@@ -386,6 +386,7 @@ display:
           uses_fields: false
           formats:
             json: json
+            hal_json: hal_json
       row:
         type: data_field
         options:
diff --git a/core/modules/simpletest/src/WebTestBase.php b/core/modules/simpletest/src/WebTestBase.php
index ca94591..735dbd5 100644
--- a/core/modules/simpletest/src/WebTestBase.php
+++ b/core/modules/simpletest/src/WebTestBase.php
@@ -1405,6 +1405,26 @@ protected function drupalGetJSON($path, array $options = array(), array $headers
   }
 
   /**
+   * Retrieves a Drupal path or an absolute path for a given format.
+   *
+   * @param string $path
+   *   Path to request AJAX from.
+   * @param string $format
+   *   The wanted request format.
+   * @param array $options
+   *   Array of URL options.
+   * @param array $headers
+   *   Array of headers.
+   *
+   * @return mixed
+   *   The result of the request.
+   */
+  protected function drupalGetWithFormat($path, $format, array $options = array(), array $headers = array()) {
+    $options += ['query' => ['_format' => $format]];
+    return Json::decode($this->drupalGet($path, $options, $headers));
+  }
+
+  /**
    * Requests a Drupal path in drupal_ajax format and JSON-decodes the response.
    */
   protected function drupalGetAjax($path, array $options = array(), array $headers = array()) {