diff --git a/src/Http/Response.php b/src/Http/Response.php
index 4ff8219c9ee..a45c8a35371 100644
--- a/src/Http/Response.php
+++ b/src/Http/Response.php
@@ -581,7 +581,7 @@ protected function _setContentType()
             return;
         }
         $whitelist = [
-            'application/javascript', 'application/json', 'application/xml', 'application/rss+xml'
+            'application/javascript', 'application/xml', 'application/rss+xml'
         ];
 
         $charset = false;
diff --git a/tests/TestCase/Http/ResponseTest.php b/tests/TestCase/Http/ResponseTest.php
index 1a48169a6b4..7064e08f241 100644
--- a/tests/TestCase/Http/ResponseTest.php
+++ b/tests/TestCase/Http/ResponseTest.php
@@ -315,7 +315,7 @@ public function testWithTypeAlias()
         );
         $this->assertSame('application/pdf', $new->getHeaderLine('Content-Type'));
         $this->assertSame(
-            'application/json; charset=UTF-8',
+            'application/json',
             $new->withType('json')->getHeaderLine('Content-Type')
         );
     }
@@ -463,7 +463,6 @@ public static function charsetTypeProvider()
         return [
             ['mp3', 'audio/mpeg'],
             ['js', 'application/javascript; charset=UTF-8'],
-            ['json', 'application/json; charset=UTF-8'],
             ['xml', 'application/xml; charset=UTF-8'],
             ['txt', 'text/plain; charset=UTF-8'],
         ];
diff --git a/tests/TestCase/Http/ResponseTransformerTest.php b/tests/TestCase/Http/ResponseTransformerTest.php
index 84303527d01..504ae7bb96b 100644
--- a/tests/TestCase/Http/ResponseTransformerTest.php
+++ b/tests/TestCase/Http/ResponseTransformerTest.php
@@ -301,10 +301,6 @@ public function testToPsrContentTypeCharsetIsTypeSpecific()
         $cake->type('application/octet-stream');
         $result = ResponseTransformer::toPsr($cake);
         $this->assertSame('application/octet-stream', $result->getHeaderLine('Content-Type'));
-
-        $cake->type('application/json');
-        $result = ResponseTransformer::toPsr($cake);
-        $this->assertSame('application/json; charset=utf-8', $result->getHeaderLine('Content-Type'));
     }
 
     /**