diff --git a/tests/fixtures/mySfUser.php b/tests/fixtures/mySfUser.php
index 3e7465d71..7fbd392e6 100644
--- a/tests/fixtures/mySfUser.php
+++ b/tests/fixtures/mySfUser.php
@@ -20,7 +20,7 @@ public function getCulture()
     /**
      * @param string $culture
      */
-    public function setCulture(string $culture): void
+    public function setCulture($culture)
     {
         $this->culture = $culture;
     }