diff --git a/swh/scheduler/tests/updater/test_events.py b/swh/scheduler/tests/updater/test_events.py
index 3d497a9..b50349a 100644
--- a/swh/scheduler/tests/updater/test_events.py
+++ b/swh/scheduler/tests/updater/test_events.py
@@ -1,50 +1,53 @@
 # Copyright (C) 2018  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import unittest
 
 from arrow import utcnow
 from hypothesis import given
-from hypothesis.strategies import one_of, text, just, sampled_from
+from hypothesis.strategies import text, sampled_from
 from nose.tools import istest
 
 from swh.scheduler.updater.events import SWHEvent, LISTENED_EVENTS
 from swh.scheduler.updater.ghtorrent import events
 
 
 def event_values_ko():
     return set(events['evt']).union(
         set(events['ent'])).difference(
         set(LISTENED_EVENTS))
 
 
+WRONG_EVENTS = sorted(list(event_values_ko()))
+
+
 class EventTest(unittest.TestCase):
     def _make_event(self, event_name):
         return {
             'type': event_name,
             'url': 'something',
             'last_seen': utcnow(),
         }
 
     @istest
     @given(sampled_from(LISTENED_EVENTS))
     def check_ok(self, event_name):
         evt = self._make_event(event_name)
         self.assertTrue(SWHEvent(evt).check())
 
     @istest
     @given(text())
     def check_with_noisy_event_should_be_ko(self, event_name):
         if event_name in LISTENED_EVENTS:
             # just in generation generates a real and correct name, skip it
             return
         evt = self._make_event(event_name)
         self.assertFalse(SWHEvent(evt).check())
 
     @istest
-    @given(one_of(map(just, event_values_ko())))
+    @given(sampled_from(WRONG_EVENTS))
     def check_ko(self, event_name):
         evt = self._make_event(event_name)
         self.assertFalse(SWHEvent(evt).check())