diff --git a/pkgs/development/python-modules/Logbook/default.nix b/pkgs/development/python-modules/Logbook/default.nix
index 866c0410929..503fefc0013 100644
--- a/pkgs/development/python-modules/Logbook/default.nix
+++ b/pkgs/development/python-modules/Logbook/default.nix
@@ -18,6 +18,9 @@ buildPythonPackage rec {
     py.test tests
   '';
 
+  # Some of the tests use localhost networking.
+  __darwinAllowLocalNetworking = true;
+
   meta = {
     homepage = https://pythonhosted.org/Logbook/;
     description = "A logging replacement for Python";