diff --git a/integration_tests.py b/integration_tests.py
index 4f0586b6cd6..6f1d621dff0 100755
--- a/integration_tests.py
+++ b/integration_tests.py
@@ -193,7 +193,8 @@ def prepare_environment(
     release_var: Optional[str] = None,
 ):
     """Prepare the local environment for installing DIRAC."""
-
+    if extra_module is None:
+        extra_module = []
     _check_containers_running(is_up=False)
     if editable is None:
         editable = sys.stdout.isatty()