diff --git a/tests/Doctrine/Tests/Mocks/DriverMock.php b/tests/Doctrine/Tests/Mocks/DriverMock.php
index af9f869ce..cc33c4c34 100644
--- a/tests/Doctrine/Tests/Mocks/DriverMock.php
+++ b/tests/Doctrine/Tests/Mocks/DriverMock.php
@@ -85,4 +85,9 @@ class DriverMock implements \Doctrine\DBAL\Driver
     {
         return;
     }
+
+    public function convertExceptionCode(\Exception $exception)
+    {
+        return 0;
+    }
 }