diff --git a/km3pipe/pumps/tests/test_evt.py b/km3pipe/pumps/tests/test_evt.py
index <HASH>..<HASH> 100644
--- a/km3pipe/pumps/tests/test_evt.py
+++ b/km3pipe/pumps/tests/test_evt.py
@@ -81,7 +81,7 @@ class TestEvtParser(TestCase):
             "end_event:"
             ))
 
-        self.pump = EvtPump()
+        self.pump = EvtPump(None)
         self.pump.blob_file = StringIO(self.valid_evt_header)
 
     def tearDown(self):
Fixes broken test due to new positional argument 'filename' in pumps