diff --git a/nixos/tests/matrix/mjolnir.nix b/nixos/tests/matrix/mjolnir.nix
index cb843e2e9e3e..b1ac55d951ce 100644
--- a/nixos/tests/matrix/mjolnir.nix
+++ b/nixos/tests/matrix/mjolnir.nix
@@ -32,6 +32,7 @@ import ../make-test-python.nix (
     name = "mjolnir";
     meta = with pkgs.lib; {
       maintainers = teams.matrix.members;
+      broken = true; # times out after spending many hours
     };
 
     nodes = {