diff --git a/vcsserver/hooks.py b/vcsserver/hooks.py
--- a/vcsserver/hooks.py
+++ b/vcsserver/hooks.py
@@ -90,6 +90,7 @@ class HooksHttpClient:
 
 class HooksDummyClient:
     def __init__(self, hooks_module):
+        log.debug('HooksDummyClient import: %s', hooks_module)
         self._hooks_module = importlib.import_module(hooks_module)
 
     def __call__(self, hook_name, extras):