diff --git a/CHANGES/8139.contrib.rst b/CHANGES/8139.contrib.rst
new file mode 100644
index 00000000000..fd743e70f4a
--- /dev/null
+++ b/CHANGES/8139.contrib.rst
@@ -0,0 +1 @@
+Two definitions for "test_invalid_route_name" existed, only one was being run. Refactored them into a single parameterized test. Enabled lint rule to prevent regression. -- by :user:`alexmac`.
diff --git a/setup.cfg b/setup.cfg
index b03fa34235e..f4f768a037d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -86,7 +86,7 @@ zip_ok = false
 [flake8]
 extend-select = B950
 # TODO: don't disable D*, fix up issues instead
-ignore = N801,N802,N803,E203,E226,E305,W504,E252,E301,E302,E501,E704,W503,W504,F811,D1,D4
+ignore = N801,N802,N803,E203,E226,E305,W504,E252,E301,E302,E501,E704,W503,W504,D1,D4
 max-line-length = 88
 per-file-ignores =
     # I900: Shouldn't appear in requirements for examples.
diff --git a/tests/test_urldispatch.py b/tests/test_urldispatch.py
index adb1e52e781..9d4ad79ca7b 100644
--- a/tests/test_urldispatch.py
+++ b/tests/test_urldispatch.py
@@ -1146,14 +1146,16 @@ def test_subapp_iter(app: Any) -> None:
     assert list(resource) == [r1, r2]
 
 
-def test_invalid_route_name(router: Any) -> None:
-    with pytest.raises(ValueError):
-        router.add_get("/", make_handler(), name="invalid name")
-
-
-def test_invalid_route_name(router) -> None:
+@pytest.mark.parametrize(
+    "route_name",
+    (
+        "invalid name",
+        "class",
+    ),
+)
+def test_invalid_route_name(router: Any, route_name: str) -> None:
     with pytest.raises(ValueError):
-        router.add_get("/", make_handler(), name="class")  # identifier
+        router.add_get("/", make_handler(), name=route_name)
 
 
 def test_frozen_router(router: Any) -> None: