diff --git a/pkgs/development/python-modules/flask-testing/default.nix b/pkgs/development/python-modules/flask-testing/default.nix
index 07d410fa1b17..a03bf68c9465 100644
--- a/pkgs/development/python-modules/flask-testing/default.nix
+++ b/pkgs/development/python-modules/flask-testing/default.nix
@@ -29,8 +29,7 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  # Some of the tests use localhost networking on darwin
-  doCheck = !stdenv.hostPlatform.isDarwin;
+  __darwinAllowLocalNetworking = true;
 
   disabledTests = [
     # RuntimeError and NotImplementedError