diff --git a/tests/test_requests.py b/tests/test_requests.py
index d05febeef5..b4e9fe92ae 100644
--- a/tests/test_requests.py
+++ b/tests/test_requests.py
@@ -2721,7 +2721,7 @@ def test_preparing_bad_url(self, url):
         with pytest.raises(requests.exceptions.InvalidURL):
             r.prepare()
 
-    @pytest.mark.parametrize("url, exception", (("http://localhost:-1", InvalidURL),))
+    @pytest.mark.parametrize("url, exception", (("http://:1", InvalidURL),))
     def test_redirecting_to_bad_url(self, httpbin, url, exception):
         with pytest.raises(exception):
             requests.get(httpbin("redirect-to"), params={"url": url})