diff --git a/pkgs/development/python-modules/notebook/default.nix b/pkgs/development/python-modules/notebook/default.nix
index 7fe6ca6d23ed..5e0d4a1b064a 100644
--- a/pkgs/development/python-modules/notebook/default.nix
+++ b/pkgs/development/python-modules/notebook/default.nix
@@ -62,6 +62,7 @@ buildPythonPackage rec {
     "sock_server"
     "test_list_formats" # tries to find python MIME type
     "KernelCullingTest" # has a race condition failing on slower hardware
+    "test_connections" # tornado.simple_httpclient.HTTPTimeoutError: Timeout during request"
   ] ++ lib.optionals stdenv.isDarwin [
     "test_delete"
     "test_checkpoints_follow_file"