diff --git a/pkgs/development/python-modules/waitress/default.nix b/pkgs/development/python-modules/waitress/default.nix
index 79e9b73780bb..4a3fb719bb53 100644
--- a/pkgs/development/python-modules/waitress/default.nix
+++ b/pkgs/development/python-modules/waitress/default.nix
@@ -31,6 +31,9 @@ buildPythonPackage rec {
     "test_service_port"
   ];
 
+  # Tests use sockets
+  __darwinAllowLocalNetworking = true;
+
   meta = with lib; {
     homepage = "https://github.com/Pylons/waitress";
     description = "Waitress WSGI server";