diff --git a/tests/test_cancellation.py b/tests/test_cancellation.py
index 726ffd91e..9f8ae0d84 100644
--- a/tests/test_cancellation.py
+++ b/tests/test_cancellation.py
@@ -544,7 +544,7 @@ async def delayed_kbi():
                     await p.run(do_nuthin)
         finally:
             duration = time.time() - start
-            if duration > 1:
+            if duration > 2.9:
                 raise trio.TooSlowError(
                     'daemon cancel was slower then necessary..'
                 )