diff --git a/src/Symfony/Component/Validator/Constraints/CardSchemeValidator.php b/src/Symfony/Component/Validator/Constraints/CardSchemeValidator.php
index 97b4567491..f674773127 100644
--- a/src/Symfony/Component/Validator/Constraints/CardSchemeValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/CardSchemeValidator.php
@@ -74,9 +74,11 @@ class CardSchemeValidator extends ConstraintValidator
 
         if (!is_numeric($value)) {
             $this->context->addViolation($constraint->message);
+
+            return;
         }
 
-        $schemes = array_flip($constraint->schemes);
+        $schemes = array_flip((array) $constraint->schemes);
         $schemeRegexes = array_intersect_key($this->schemes, $schemes);
 
         foreach ($schemeRegexes as $regexes) {
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CardSchemeValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CardSchemeValidatorTest.php
index 3fa3092dca..fab8ff9235 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CardSchemeValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CardSchemeValidatorTest.php
@@ -56,13 +56,23 @@ class CardSchemeValidatorTest extends \PHPUnit_Framework_TestCase
         $this->context->expects($this->never())
             ->method('addViolation');
 
-        $this->validator->validate($number, new CardScheme(array('schemes' => array($scheme))));
+        $this->validator->validate($number, new CardScheme(array('schemes' => $scheme)));
+    }
+
+    /**
+     * @dataProvider getInvalidNumbers
+     */
+    public function testInvalidNumbers($scheme, $number)
+    {
+        $this->context->expects($this->once())
+            ->method('addViolation');
+
+        $this->validator->validate($number, new CardScheme(array('schemes' => $scheme)));
     }
 
     public function getValidNumbers()
     {
         return array(
-            array('VISA', '42424242424242424242'),
             array('AMEX', '378282246310005'),
             array('AMEX', '371449635398431'),
             array('AMEX', '378734493671000'),
@@ -76,6 +86,24 @@ class CardSchemeValidatorTest extends \PHPUnit_Framework_TestCase
             array('VISA', '4111111111111111'),
             array('VISA', '4012888888881881'),
             array('VISA', '4222222222222'),
+            array('VISA', '42424242424242424242'),
+            array(array('AMEX', 'VISA'), '42424242424242424242'),
+            array(array('AMEX', 'VISA'), '378282246310005'),
+            array(array('JCB', 'MASTERCARD'), '5105105105105100'),
+            array(array('VISA', 'MASTERCARD'), '5105105105105100'),
+        );
+    }
+
+    public function getInvalidNumbers()
+    {
+        return array(
+            array('AMEX', '30569309025904'), // DINERS number
+            array('AMEX', 'invalid'), // A string
+            array('AMEX', 0), // a lone number
+            array('AMEX', '0'), // a lone number
+            array('AMEX', '000000000000'), // a lone number
+            array('DINERS', '3056930'), // only first part of the number
+            array('DISCOVER', '1117'), // only last 4 digits
         );
     }
 }