diff --git a/tests/conftest.py b/tests/conftest.py
index 4016ff0..78cdb21 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1 +1,25 @@
-# Env var setup that must run before app.config is imported.
+import httpx
+import pytest
+from httpx import ASGITransport, AsyncClient
+
+from app.config import Settings
+from app.main import create_app
+
+
+@pytest.fixture
+async def app():
+    application = create_app(Settings(check_timeout_seconds=0.1))
+    async with application.router.lifespan_context(application):
+        yield application
+
+
+@pytest.fixture
+async def client(app):
+    async with AsyncClient(transport=ASGITransport(app=app), base_url="http://test") as value:
+        yield value
+
+
+async def create_monitor(client: httpx.AsyncClient, url: str = "https://example.com/health") -> dict:
+    response = await client.post("/v1/monitors", json={"name": "website", "url": url})
+    assert response.status_code == 201
+    return response.json()