diff --git a/tests/test_exceptions/__init__.py b/tests/test_exceptions/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/test_exceptions/test_validation_error.py b/tests/test_exceptions/test_validation_error.py
new file mode 100644
index 0000000000..ee91fc75b4
--- /dev/null
+++ b/tests/test_exceptions/test_validation_error.py
@@ -0,0 +1,16 @@
+import unittest
+
+from django.core.exceptions import ValidationError
+
+
+class TestValidationError(unittest.TestCase):
+    def test_messages_concatenates_error_dict_values(self):
+        message_dict = {}
+        with self.assertRaises(TypeError):
+            ValidationError(message_dict).messages
+        message_dict['field1'] = ['E1', 'E2']
+        exception = ValidationError(message_dict)
+        self.assertEqual(sorted(exception.messages), ['E1', 'E2'])
+        message_dict['field2'] = ['E3', 'E4']
+        exception = ValidationError(message_dict)
+        self.assertEqual(sorted(exception.messages), ['E1', 'E2', 'E3', 'E4'])