diff --git a/piccolo/apps/asgi/commands/new.py b/piccolo/apps/asgi/commands/new.py
index 5c83eca0c..85ceee021 100644
--- a/piccolo/apps/asgi/commands/new.py
+++ b/piccolo/apps/asgi/commands/new.py
@@ -12,10 +12,10 @@
 SERVERS = ["uvicorn", "Hypercorn", "granian"]
 ROUTER_DEPENDENCIES = {
     "starlette": ["starlette"],
-    "fastapi": ["fastapi>=0.112.1"],
+    "fastapi": ["fastapi"],
     "blacksheep": ["blacksheep"],
     "litestar": ["litestar"],
-    "esmerald": ["esmerald==3.3.0"],
+    "esmerald": ["esmerald"],
     "lilya": ["lilya"],
 }
 ROUTERS = list(ROUTER_DEPENDENCIES.keys())
diff --git a/requirements/test-requirements.txt b/requirements/test-requirements.txt
index 2f350ed31..006d8f2d9 100644
--- a/requirements/test-requirements.txt
+++ b/requirements/test-requirements.txt
@@ -1,4 +1,5 @@
 coveralls==3.3.1
+httpx==0.27.2
 pytest-cov==3.0.0
 pytest==6.2.5
 python-dateutil==2.8.2
diff --git a/tests/apps/asgi/commands/files/dummy_server.py b/tests/apps/asgi/commands/files/dummy_server.py
index 3c3250776..9b83470a3 100644
--- a/tests/apps/asgi/commands/files/dummy_server.py
+++ b/tests/apps/asgi/commands/files/dummy_server.py
@@ -3,8 +3,10 @@
 import sys
 import typing as t
 
+from httpx import AsyncClient
 
-def dummy_server(app: t.Union[str, t.Callable] = "app:app"):
+
+async def dummy_server(app: t.Union[str, t.Callable] = "app:app"):
     """
     A very simplistic ASGI server. It's used to run the generated ASGI
     applications in unit tests.
@@ -20,33 +22,13 @@ def dummy_server(app: t.Union[str, t.Callable] = "app:app"):
     if isinstance(app, str):
         path, app_name = app.rsplit(":")
         module = importlib.import_module(path)
-        app = getattr(module, app_name)
-
-    async def send(message):
-        if message["type"] == "http.response.start":
-            if message["status"] == 200:
-                print("Received 200")
-            else:
-                sys.exit("200 not received from app")
-
-    async def receive():
-        pass
-
-    scope = {
-        "scheme": "http",
-        "type": "http",
-        "path": "/",
-        "raw_path": b"/",
-        "method": "GET",
-        "query_string": b"",
-        "headers": [],
-    }
-    if callable(app):
-        asyncio.run(app(scope, receive, send))
-        print("Exiting dummy server ...")
-    else:
-        sys.exit("The app isn't callable!")
+        app = t.cast(t.Callable, getattr(module, app_name))
+
+    async with AsyncClient(app=app) as client:
+        response = await client.get("http://localhost:8000")
+        if response.status_code != 200:
+            sys.exit("The app isn't callable!")
 
 
 if __name__ == "__main__":
-    dummy_server()
+    asyncio.run(dummy_server())