diff --git a/tests/unit/retry/test_retry_base.py b/tests/unit/retry/test_retry_base.py
index fa55d935..5db1de01 100644
--- a/tests/unit/retry/test_retry_base.py
+++ b/tests/unit/retry/test_retry_base.py
@@ -138,7 +138,8 @@ def test_constructor_options(self):
         assert retry_._on_error is _some_function
 
     @pytest.mark.parametrize("use_deadline", [True, False])
-    def test_with_timeout(self, use_deadline):
+    @pytest.mark.parametrize("value", [None, 0, 1, 4, 42, 5.5])
+    def test_with_timeout(self, use_deadline, value):
         retry_ = self._make_one(
             predicate=mock.sentinel.predicate,
             initial=1,
@@ -148,11 +149,11 @@ def test_with_timeout(self, use_deadline):
             on_error=mock.sentinel.on_error,
         )
         new_retry = (
-            retry_.with_timeout(42) if not use_deadline else retry_.with_deadline(42)
+            retry_.with_timeout(value) if not use_deadline else retry_.with_deadline(value)
         )
         assert retry_ is not new_retry
-        assert new_retry._timeout == 42
-        assert new_retry.timeout == 42 if not use_deadline else new_retry.deadline == 42
+        assert new_retry._timeout == value
+        assert new_retry.timeout == value if not use_deadline else new_retry.deadline == value
 
         # the rest of the attributes should remain the same
         assert new_retry._predicate is retry_._predicate