diff --git a/pkgs/development/python-modules/coffea/default.nix b/pkgs/development/python-modules/coffea/default.nix
index ff4870e21a5f..870c9f3b950f 100644
--- a/pkgs/development/python-modules/coffea/default.nix
+++ b/pkgs/development/python-modules/coffea/default.nix
@@ -97,6 +97,10 @@ buildPythonPackage rec {
     # Requires internet access
     # https://github.com/CoffeaTeam/coffea/issues/1094
     "test_lumimask"
+
+    # Flaky: FileNotFoundError: [Errno 2] No such file or directory: 'nminusone.npz'
+    # https://github.com/scikit-hep/coffea/issues/1246
+    "test_packed_selection_nminusone_dak"
   ];
 
   __darwinAllowLocalNetworking = true;