diff --git a/pkgs/development/python-modules/asgi-csrf/default.nix b/pkgs/development/python-modules/asgi-csrf/default.nix
index 12c94aee1573..257e7314af9e 100644
--- a/pkgs/development/python-modules/asgi-csrf/default.nix
+++ b/pkgs/development/python-modules/asgi-csrf/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, isPy27, fetchFromGitHub, itsdangerous, python-multipart
-, pytest, starlette, httpx, pytest-asyncio }:
+, pytestCheckHook, starlette, httpx, pytest-asyncio }:
 
 buildPythonPackage rec {
   version = "0.7";
@@ -14,12 +14,23 @@ buildPythonPackage rec {
     sha256 = "1vf4lh007790836cp3hd6wf8wsgj045dcg0w1cm335p08zz6j4k7";
   };
 
-  propagatedBuildInputs = [ itsdangerous python-multipart ];
+  propagatedBuildInputs = [
+    itsdangerous
+    python-multipart
+  ];
+
+  checkInputs = [
+    httpx
+    pytest-asyncio
+    pytestCheckHook
+    starlette
+  ];
+
+  # tests fail while importing a private module from httpx
+  #  E   ModuleNotFoundError: No module named 'httpx._content_streams'
+  # https://github.com/simonw/asgi-csrf/issues/18
+  doCheck = false;
 
-  checkInputs = [ pytest starlette httpx pytest-asyncio ];
-  checkPhase = ''
-    pytest test_asgi_csrf.py
-  '';
   pythonImportsCheck = [ "asgi_csrf" ];
 
   meta = with stdenv.lib; {