diff --git a/pkgs/desktops/lomiri/applications/morph-browser/default.nix b/pkgs/desktops/lomiri/applications/morph-browser/default.nix
index 8653a7f99ef5..4e5b38564e40 100644
--- a/pkgs/desktops/lomiri/applications/morph-browser/default.nix
+++ b/pkgs/desktops/lomiri/applications/morph-browser/default.nix
@@ -163,7 +163,7 @@ stdenv.mkDerivation (finalAttrs: {
       # Test of morph-browser itself
       standalone = if withQt6 then nixosTests.morph-browser.qt6 else nixosTests.morph-browser.qt5;
     }
-    // lib.optionalAttrs (!withQt6) {
+    // lib.optionalAttrs withQt6 {
       # Interactions between the Lomiri ecosystem and this browser
       inherit (nixosTests.lomiri) desktop-basics desktop-appinteractions;
     };