diff --git a/tests/modules/programs/thunderbird/thunderbird-with-firefox.nix b/tests/modules/programs/thunderbird/thunderbird-with-firefox.nix
index bd1744fa8..0d23460d2 100644
--- a/tests/modules/programs/thunderbird/thunderbird-with-firefox.nix
+++ b/tests/modules/programs/thunderbird/thunderbird-with-firefox.nix
@@ -1,5 +1,9 @@
 # Confirm that both Firefox and Thunderbird can be configured at the same time.
 { lib, realPkgs, ... }:
 lib.recursiveUpdate (import ./thunderbird.nix { inherit lib realPkgs; }) {
-  programs.firefox.enable = true;
+  programs.firefox = {
+    enable = true;
+    # Darwin doesn't support wrapped Firefox, using unwrapped instead
+    package = realPkgs.firefox-unwrapped;
+  };
 }
diff --git a/tests/modules/programs/thunderbird/thunderbird.nix b/tests/modules/programs/thunderbird/thunderbird.nix
index aa46b3b2d..a5bb3148c 100644
--- a/tests/modules/programs/thunderbird/thunderbird.nix
+++ b/tests/modules/programs/thunderbird/thunderbird.nix
@@ -1,8 +1,6 @@
 { lib, realPkgs, ... }: {
   imports = [ ../../accounts/email-test-accounts.nix ];
 
-  _module.args.pkgs = lib.mkForce realPkgs;
-
   accounts.email.accounts = {
     "hm@example.com" = {
       thunderbird = {