diff --git a/core/modules/rest/lib/Drupal/rest/Plugin/views/display/RestExport.php b/core/modules/rest/lib/Drupal/rest/Plugin/views/display/RestExport.php
index 1e816e2..6fd2170 100644
--- a/core/modules/rest/lib/Drupal/rest/Plugin/views/display/RestExport.php
+++ b/core/modules/rest/lib/Drupal/rest/Plugin/views/display/RestExport.php
@@ -81,7 +81,7 @@ public function initDisplay(ViewExecutable $view, array &$display, array &$optio
     $request_content_type = $negotiation->getContentType($request);
     // Only set the requested content type if it's not html.
     if ($request_content_type === 'html') {
-      if (\Drupal::moduleHandler()->moduleExists('hal_json')) {
+      if (\Drupal::moduleHandler()->moduleExists('hal')) {
         $this->setContentType('hal_json');
       }
     }
diff --git a/core/modules/rest/lib/Drupal/rest/Tests/Views/StyleSerializerTest.php b/core/modules/rest/lib/Drupal/rest/Tests/Views/StyleSerializerTest.php
index 260361d..4824307 100644
--- a/core/modules/rest/lib/Drupal/rest/Tests/Views/StyleSerializerTest.php
+++ b/core/modules/rest/lib/Drupal/rest/Tests/Views/StyleSerializerTest.php
@@ -129,13 +129,13 @@ public function testSerializerResponses() {
 
     // Test that by default the output will be JSON if hal is enabled.
     $expected = $serializer->serialize($entities, 'hal_json');
-    $actual_xml = $this->drupalGet('test/serialize/entity');
-    $this->assertIdentical($actual_xml, $expected, 'If hal modul is enabled by default hal_json output is returned.');
+    $actual = $this->drupalGet('test/serialize/entity');
+    $this->assertIdentical($actual, $expected, 'If hal module is enabled by default hal_json output is returned.');
 
-    module_disable('hal');
+    module_disable(array('hal'));
     $expected = $serializer->serialize($entities, 'json');
-    $actual_xml = $this->drupalGet('test/serialize/entity');
-    $this->assertIdentical($actual_xml, $expected, 'By default json output is returned.');
+    $actual = $this->drupalGet('test/serialize/entity');
+    $this->assertIdentical($actual, $expected, 'By default json output is returned.');
   }
 
   /**