diff --git a/src/apispec_webframeworks/aiohttp.py b/src/apispec_webframeworks/aiohttp.py
index 25ee994..2394d37 100644
--- a/src/apispec_webframeworks/aiohttp.py
+++ b/src/apispec_webframeworks/aiohttp.py
@@ -60,8 +60,9 @@ def path_helper(
         **kwargs: Any,
     ) -> str | None:
         """Path helper that allows passing a aiohttp AbstractRoute"""
+        if route is None:
+            return None
         assert operations is not None
-        assert route is not None
 
         docstring = route.handler.__doc__ or ""
         operations.update(
diff --git a/src/apispec_webframeworks/bottle.py b/src/apispec_webframeworks/bottle.py
index ee1465e..77b97fd 100644
--- a/src/apispec_webframeworks/bottle.py
+++ b/src/apispec_webframeworks/bottle.py
@@ -67,8 +67,9 @@ def path_helper(
         **kwargs: Any,
     ) -> str | None:
         """Path helper that allows passing a bottle view function."""
+        if view is None:
+            return None
         assert operations is not None
-        assert view is not None
 
         docstring = view.__doc__ or ""
         operations.update(yaml_utils.load_operations_from_docstring(docstring))
diff --git a/src/apispec_webframeworks/flask.py b/src/apispec_webframeworks/flask.py
index c90e5dc..7c82cb5 100644
--- a/src/apispec_webframeworks/flask.py
+++ b/src/apispec_webframeworks/flask.py
@@ -132,7 +132,8 @@ def path_helper(
         **kwargs: Any,
     ) -> str | None:
         """Path helper that allows passing a Flask view function."""
-        assert view is not None
+        if view is None:
+            return None
         assert operations is not None
 
         rule = self._rule_for_view(view, app=app)
diff --git a/src/apispec_webframeworks/tornado.py b/src/apispec_webframeworks/tornado.py
index 3025651..9ad3f0f 100644
--- a/src/apispec_webframeworks/tornado.py
+++ b/src/apispec_webframeworks/tornado.py
@@ -115,8 +115,9 @@ def path_helper(
         **kwargs: Any,
     ) -> str | None:
         """Path helper that allows passing a Tornado URLSpec or tuple."""
+        if urlspec is None:
+            return None
         assert operations is not None
-        assert urlspec is not None
 
         if not isinstance(urlspec, URLSpec):
             urlspec = URLSpec(*urlspec)
diff --git a/tests/test_ext_aiohttp.py b/tests/test_ext_aiohttp.py
index 73521a1..107149d 100644
--- a/tests/test_ext_aiohttp.py
+++ b/tests/test_ext_aiohttp.py
@@ -99,3 +99,10 @@ async def hello(request):
             "responses": {"200": {"description": "A greeting to the client"}},
         }
         assert paths["/hello"]["get"] == expected
+
+    def test_path_without_route(self, spec):
+        spec.path(
+            path="/hello",
+            operations={"get": {"responses": {"200": {}}}},
+        )
+        assert "/hello" in get_paths(spec)
diff --git a/tests/test_ext_bottle.py b/tests/test_ext_bottle.py
index 45da63b..c8a6dc6 100644
--- a/tests/test_ext_bottle.py
+++ b/tests/test_ext_bottle.py
@@ -109,3 +109,10 @@ def handler():
 
         spec.path(view=handler)
         assert "/pet/{pet_id}/{shop_id}" in get_paths(spec)
+
+    def test_path_without_view(self, spec):
+        spec.path(
+            path="/hello",
+            operations={"get": {"responses": {"200": {}}}},
+        )
+        assert "/hello" in get_paths(spec)
diff --git a/tests/test_ext_flask.py b/tests/test_ext_flask.py
index c3356d4..b23674c 100644
--- a/tests/test_ext_flask.py
+++ b/tests/test_ext_flask.py
@@ -180,3 +180,10 @@ def get_pet(pet_id):
 
         spec.path(view=get_pet, app=app)
         assert "/pet/{pet_id}" in get_paths(spec)
+
+    def test_path_without_view(self, spec):
+        spec.path(
+            path="/hello",
+            operations={"get": {"responses": {"200": {}}}},
+        )
+        assert "/hello" in get_paths(spec)
diff --git a/tests/test_ext_tornado.py b/tests/test_ext_tornado.py
index 6ab9013..1f163ef 100644
--- a/tests/test_ext_tornado.py
+++ b/tests/test_ext_tornado.py
@@ -154,3 +154,10 @@ def test_no_groups_in_path_with_extra_params(self, spec, Handler):
         path = "/helloworld"
         paths = get_paths(spec)
         assert path in paths
+
+    def test_path_without_urlspec(self, spec):
+        spec.path(
+            path="/hello",
+            operations={"get": {"responses": {"200": {}}}},
+        )
+        assert "/hello" in get_paths(spec)