diff --git a/src/Illuminate/Validation/Concerns/ValidatesAttributes.php b/src/Illuminate/Validation/Concerns/ValidatesAttributes.php
index 6a22dd3cc06c..86bba603c1b7 100644
--- a/src/Illuminate/Validation/Concerns/ValidatesAttributes.php
+++ b/src/Illuminate/Validation/Concerns/ValidatesAttributes.php
@@ -358,7 +358,7 @@ protected function validateDateFormat($attribute, $value, $parameters)
             return false;
         }
 
-        $date = DateTime::createFromFormat($parameters[0], $value);
+        $date = DateTime::createFromFormat('!'.$parameters[0], $value);
 
         return $date && $date->format($parameters[0]) == $value;
     }
diff --git a/tests/Validation/ValidationValidatorTest.php b/tests/Validation/ValidationValidatorTest.php
index ddda0b42bfcf..ab8a687696e5 100755
--- a/tests/Validation/ValidationValidatorTest.php
+++ b/tests/Validation/ValidationValidatorTest.php
@@ -2144,6 +2144,9 @@ public function testValidateDateAndFormat()
         $v = new Validator($trans, ['x' => '00-01-01'], ['x' => 'date_format:Y-m-d']);
         $this->assertTrue($v->fails());
 
+        $v = new Validator($trans, ['x' => '2000-02'], ['x' => 'date_format:Y-m']);
+        $this->assertTrue($v->passes());
+
         $v = new Validator($trans, ['x' => ['Not', 'a', 'date']], ['x' => 'date_format:Y-m-d']);
         $this->assertTrue($v->fails());