diff --git a/tests/test_app.py b/tests/test_app.py
new file mode 100644
index 00000000..343a1629
--- /dev/null
+++ b/tests/test_app.py
@@ -0,0 +1,43 @@
+import pytest
+from asphalt.core import Context
+from fastapi import APIRouter
+from httpx import AsyncClient
+from jupyverse_api import Router
+from jupyverse_api.app import App
+from jupyverse_api.main import JupyverseComponent
+
+from utils import configure
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize("mount_path", (None, "/foo",))
+async def test_mount_path(mount_path, unused_tcp_port):
+    components = configure(
+        {"app": {"type": "app"}},
+        {"app": {"mount_path": mount_path}}
+    )
+
+    async with Context() as ctx, AsyncClient(follow_redirects=True)as http:
+        await JupyverseComponent(
+            components=components,
+            port=unused_tcp_port,
+        ).start(ctx)
+
+        app = await ctx.request_resource(App)
+        router = APIRouter()
+
+        @router.get("/")
+        async def get():
+            pass
+
+        Router(app).include_router(router)
+
+        response = await http.get(f"http://127.0.0.1:{unused_tcp_port}")
+        expected = 200 if mount_path is None else 404
+        assert response.status_code == expected
+
+        response = await http.get(f"http://127.0.0.1:{unused_tcp_port}/bar")
+        assert response.status_code == 404
+
+        response = await http.get(f"http://127.0.0.1:{unused_tcp_port}/foo")
+        expected = 404 if mount_path is None else 200