diff --git a/pkgs/development/python-modules/streamz/default.nix b/pkgs/development/python-modules/streamz/default.nix
index 5aab96e7c462..ab03d9ad560e 100644
--- a/pkgs/development/python-modules/streamz/default.nix
+++ b/pkgs/development/python-modules/streamz/default.nix
@@ -63,6 +63,7 @@ buildPythonPackage rec {
 
     # Tests are flaky
     "test_buffer"
+    "test_partition_timeout_cancel"
   ];
 
   __darwinAllowLocalNetworking = true;