diff --git a/nixos/tests/terminal-emulators.nix b/nixos/tests/terminal-emulators.nix
index 3cf99fe7fc2f..c72b1c390e8c 100644
--- a/nixos/tests/terminal-emulators.nix
+++ b/nixos/tests/terminal-emulators.nix
@@ -62,6 +62,9 @@ let tests = {
       konsole.pkg = p: p.plasma5Packages.konsole;
 
       lomiri-terminal-app.pkg = p: p.lomiri.lomiri-terminal-app;
+      # after recent Mesa change, borked software rendering config under x86_64 icewm?
+      # BGR colour display on x86_64, RGB on aarch64
+      lomiri-terminal-app.colourTest = false;
 
       lxterminal.pkg = p: p.lxterminal;