diff --git a/tests/test_async.py b/tests/test_async.py
index fe257e2..20de2be 100644
--- a/tests/test_async.py
+++ b/tests/test_async.py
@@ -254,7 +254,7 @@ async def f(*args, **kw):
 
             return args, kw
 
-        arc = stamina.AsyncRetryingCaller().on(on)
+        arc = stamina.AsyncRetryingCaller(wait_max=0).on(on)
 
         args, kw = await arc(f, 42, foo="bar")
 
diff --git a/tests/test_sync.py b/tests/test_sync.py
index de6e976..d63348c 100644
--- a/tests/test_sync.py
+++ b/tests/test_sync.py
@@ -218,7 +218,7 @@ def f(*args, **kw):
 
             return args, kw
 
-        bound_rc = stamina.RetryingCaller().on(on)
+        bound_rc = stamina.RetryingCaller(wait_max=0).on(on)
 
         args, kw = bound_rc(f, 42, foo="bar")