diff --git a/test/libraries/PMA_insert_edit_test.php b/test/libraries/PMA_insert_edit_test.php
index 9be5bdb28d..8de6ac52c5 100644
--- a/test/libraries/PMA_insert_edit_test.php
+++ b/test/libraries/PMA_insert_edit_test.php
@@ -217,6 +217,7 @@ class PMA_InsertEditTest extends PHPUnit_Framework_TestCase
             ->setMethods(array('addHtml'))
             ->getMock();
 
+        $restoreInstance = PMA_Response::getInstance();
         $response = new ReflectionProperty('PMA_Response', '_instance');
         $response->setAccessible(true);
         $response->setValue($responseMock);
@@ -225,6 +226,8 @@ class PMA_InsertEditTest extends PHPUnit_Framework_TestCase
             array(false), 0, array('1'), 'SELECT', array('1' => 'result1')
         );
 
+        $attrInstance->setValue($restoreInstance);
+
         $this->assertFalse($result);
     }
 
@@ -1926,12 +1929,15 @@ class PMA_InsertEditTest extends PHPUnit_Framework_TestCase
             ->method('getHeader')
             ->will($this->returnValue($headerMock));
 
+        $restoreInstance = PMA_Response::getInstance();
         $response = new ReflectionProperty('PMA_Response', '_instance');
         $response->setAccessible(true);
         $response->setValue($responseMock);
 
         PMA_isInsertRow();
 
+        $attrInstance->setValue($restoreInstance);
+
         $this->assertEquals(5, $GLOBALS['cfg']['InsertRows']);
     }
 
@@ -2765,6 +2771,7 @@ class PMA_InsertEditTest extends PHPUnit_Framework_TestCase
             ->setMethods(array('addHtml'))
             ->getMock();
 
+        $restoreInstance = PMA_Response::getInstance();
         $response = new ReflectionProperty('PMA_Response', '_instance');
         $response->setAccessible(true);
         $response->setValue($responseMock);
@@ -2792,6 +2799,8 @@ class PMA_InsertEditTest extends PHPUnit_Framework_TestCase
 
         $result = PMA_determineInsertOrEdit(null, 'db', 'table');
 
+        $attrInstance->setValue($restoreInstance);
+
         $this->assertEquals(
             array(
                 true,