diff --git a/datasette/app.py b/datasette/app.py
index 8591af6a..c0b14fb2 100644
--- a/datasette/app.py
+++ b/datasette/app.py
@@ -1934,36 +1934,52 @@ class DatasetteClient:
         return path
 
     async def get(self, path, **kwargs):
-        async with httpx.AsyncClient(app=self.app) as client:
+        async with httpx.AsyncClient(
+            transport=httpx.ASGITransport(app=self.app)
+        ) as client:
             return await client.get(self._fix(path), **kwargs)
 
     async def options(self, path, **kwargs):
-        async with httpx.AsyncClient(app=self.app) as client:
+        async with httpx.AsyncClient(
+            transport=httpx.ASGITransport(app=self.app)
+        ) as client:
             return await client.options(self._fix(path), **kwargs)
 
     async def head(self, path, **kwargs):
-        async with httpx.AsyncClient(app=self.app) as client:
+        async with httpx.AsyncClient(
+            transport=httpx.ASGITransport(app=self.app)
+        ) as client:
             return await client.head(self._fix(path), **kwargs)
 
     async def post(self, path, **kwargs):
-        async with httpx.AsyncClient(app=self.app) as client:
+        async with httpx.AsyncClient(
+            transport=httpx.ASGITransport(app=self.app)
+        ) as client:
             return await client.post(self._fix(path), **kwargs)
 
     async def put(self, path, **kwargs):
-        async with httpx.AsyncClient(app=self.app) as client:
+        async with httpx.AsyncClient(
+            transport=httpx.ASGITransport(app=self.app)
+        ) as client:
             return await client.put(self._fix(path), **kwargs)
 
     async def patch(self, path, **kwargs):
-        async with httpx.AsyncClient(app=self.app) as client:
+        async with httpx.AsyncClient(
+            transport=httpx.ASGITransport(app=self.app)
+        ) as client:
             return await client.patch(self._fix(path), **kwargs)
 
     async def delete(self, path, **kwargs):
-        async with httpx.AsyncClient(app=self.app) as client:
+        async with httpx.AsyncClient(
+            transport=httpx.ASGITransport(app=self.app)
+        ) as client:
             return await client.delete(self._fix(path), **kwargs)
 
     async def request(self, method, path, **kwargs):
         avoid_path_rewrites = kwargs.pop("avoid_path_rewrites", None)
-        async with httpx.AsyncClient(app=self.app) as client:
+        async with httpx.AsyncClient(
+            transport=httpx.ASGITransport(app=self.app)
+        ) as client:
             return await client.request(
                 method, self._fix(path, avoid_path_rewrites), **kwargs
             )