diff --git a/test/PMATestCase.php b/test/PMATestCase.php
index 6a13ed3fe2..42634405b4 100644
--- a/test/PMATestCase.php
+++ b/test/PMATestCase.php
@@ -21,4 +21,33 @@ class PMATestCase extends PHPUnit_Framework_TestCase
         require 'libraries/config.default.php';
         $GLOBALS['cfg'] = $cfg;
     }
+    /**
+     * Creates mock of Response object
+     *
+     * @param string $param parameter for header method
+     *
+     * @return void
+     */
+    public static function mockResponse($param)
+    {
+        $restoreInstance = PMA\libraries\Response::getInstance();
+
+        $mockResponse = $this->getMockBuilder('PMA\libraries\Response')
+            ->disableOriginalConstructor()
+            ->setMethods(array('header', 'headersSent'))
+            ->getMock();
+
+        $mockResponse->expects($this->once())
+            ->method('header')
+            ->with($param);
+
+        $mockResponse->expects($this->any())
+            ->method('headersSent')
+            ->with()
+            ->will($this->returnValue(false));
+
+        $attrInstance = new ReflectionProperty('PMA\libraries\Response', '_instance');
+        $attrInstance->setAccessible(true);
+        $attrInstance->setValue($mockResponse);
+    }
 }
\ No newline at end of file
diff --git a/test/libraries/core/PMA_headerLocation_test.php b/test/libraries/core/PMA_headerLocation_test.php
index bf07ffceb7..e6005ff1d1 100644
--- a/test/libraries/core/PMA_headerLocation_test.php
+++ b/test/libraries/core/PMA_headerLocation_test.php
@@ -12,6 +12,7 @@
 use PMA\libraries\Theme;
 use PMA\libraries\URL;
 use PMA\libraries\Sanitize;
+use PMA\test\PMATestCase;
 
 /**
  * Test function sending headers.
@@ -65,16 +66,14 @@ class PMA_HeaderLocation_Test extends PHPUnit_Framework_TestCase
 
         $testUri = 'https://example.com/test.php';
 
-        $header = array('Location: ' . $testUri);
         PMA_sendHeaderLocation($testUri); // sets $GLOBALS['header']
-        $this->assertEquals($header, $GLOBALS['header']);
+        PMATestCase::mockResponse('Location: ' . $testUri);
 
         //reset $GLOBALS['header'] for the next assertion
         unset($GLOBALS['header']);
 
-        $header = array('Refresh: 0; ' . $testUri);
         PMA_sendHeaderLocation($testUri, true); // sets $GLOBALS['header']
-        $this->assertEquals($header, $GLOBALS['header']);
+        PMATestCase::mockResponse('Refresh: 0; ' . $testUri);
     }
 
     /**
@@ -85,10 +84,9 @@ class PMA_HeaderLocation_Test extends PHPUnit_Framework_TestCase
     public function testSendHeaderLocationWithoutSidWithoutIis()
     {
         $testUri = 'https://example.com/test.php';
-        $header = array('Location: ' . $testUri);
 
         PMA_sendHeaderLocation($testUri);            // sets $GLOBALS['header']
-        $this->assertEquals($header, $GLOBALS['header']);
+        PMATestCase::mockResponse('Location: ' . $testUri);
     }
 
     /**