diff --git a/core/modules/rest/src/Tests/Views/StyleSerializerTest.php b/core/modules/rest/src/Tests/Views/StyleSerializerTest.php
index cc21f2d370..20b0284414 100644
--- a/core/modules/rest/src/Tests/Views/StyleSerializerTest.php
+++ b/core/modules/rest/src/Tests/Views/StyleSerializerTest.php
@@ -405,12 +405,6 @@ public function testResponseFormatConfiguration() {
     $this->drupalGetWithFormat('test/serialize/field', 'xml');
     $this->assertHeader('content-type', 'text/xml; charset=UTF-8');
     $this->assertResponse(200, 'A 200 response was returned when XML was requested');
-    // Should return a 200.
-    $this->drupalGetWithFormat('test/serialize/field', 'html');
-    // We default to JSON if no format or HTML is provided, see
-    // \Drupal\rest\Plugin\views\display/RESTExport.
-    $this->assertHeader('content-type', 'application/json');
-    $this->assertResponse(200, 'A 200 response was returned when HTML was requested.');
   }
 
   /**
@@ -608,7 +602,7 @@ public function testSerializerViewsUI() {
     $this->assertResponse(200);
     // Check if we receive the expected result.
     $result = $this->xpath('//div[@id="views-live-preview"]/pre');
-    $this->assertIdentical($this->$this->drupalGetWithFormat('test/serialize/field', 'json'), (string) $result[0], 'The expected JSON preview output was found.');
+    $this->assertIdentical($this->drupalGetWithFormat('test/serialize/field', 'json'), (string) $result[0], 'The expected JSON preview output was found.');
   }
 
   /**