diff --git a/tests/TestConstraint.php b/tests/TestConstraint.php
new file mode 100644
index 0000000..e6035e1
--- /dev/null
+++ b/tests/TestConstraint.php
@@ -0,0 +1,8 @@
+<?php
+class TestConstraint {
+
+  public $message = 'Test message';
+  public $testMessage = 'Test message 2';
+  public $testPluralMessage = '1 test message|@count test message';
+  public $normalVar = 'Not a message for translation';
+}