diff --git a/pkgs/development/python-modules/twisted/default.nix b/pkgs/development/python-modules/twisted/default.nix
index e461ba2df163..199944707eb4 100644
--- a/pkgs/development/python-modules/twisted/default.nix
+++ b/pkgs/development/python-modules/twisted/default.nix
@@ -109,6 +109,10 @@ buildPythonPackage rec {
             "MulticastTests.test_multicast"
             "MulticastTests.test_multiListen"
           ];
+          "src/twisted/trial/test/test_script.py" = [
+            # Fails in LXC containers with less than all cores availaible (limits.cpu)
+            "AutoJobsTests.test_cpuCount"
+          ];
           "src/twisted/internet/test/test_unix.py" = [
             # flaky?
             "UNIXTestsBuilder.test_sendFileDescriptorTriggersPauseProducing"