diff --git a/tests/test_custom_pages.py b/tests/test_custom_pages.py
index f2cfe394..48b27e7b 100644
--- a/tests/test_custom_pages.py
+++ b/tests/test_custom_pages.py
@@ -97,3 +97,8 @@ def test_custom_route_pattern_404(custom_pages_client):
     assert response.status == 404
     assert "<h1>Error 404</h1>" in response.text
     assert ">Oh no</" in response.text
+
+def test_custom_route_pattern_with_slash_slash_302(custom_pages_client):
+    response = custom_pages_client.get("//nastyOpenRedirect/")
+    assert response.status == 302
+    assert response.headers['location'] == "/nastyOpenRedirect"