diff --git a/test.nix b/test.nix
index 4643775..319d412 100644
--- a/test.nix
+++ b/test.nix
@@ -31,6 +31,13 @@ nixosTest {
       services.getty.autologinUser = "alice";
 
       environment = {
+        # For glinfo and wayland-info:
+        systemPackages = with pkgs; [
+          mesa-demos
+          wayland-utils
+          alacritty
+        ];
+
         variables = {
           SWAYSOCK = "/tmp/sway-ipc.sock";
           WLR_RENDERER = "pixman";
@@ -155,7 +162,7 @@ nixosTest {
     machine.sleep(3)
     swaymsg("exec fortify run --wayland foot")
     wait_for_window("u0_a0@machine")
-    machine.send_chars("touch /tmp/success-client\n")
+    machine.send_chars("wayland-info && touch /tmp/success-client\n")
     machine.wait_for_file("/tmp/fortify.1000/tmpdir/0/success-client")
     machine.screenshot("foot_wayland_permissive")
     machine.send_chars("exit\n")
@@ -166,12 +173,20 @@ nixosTest {
     machine.sleep(3)
     swaymsg("exec foot fortify run --wayland foot")
     wait_for_window("u0_a0@machine")
-    machine.send_chars("touch /tmp/success-client-term\n")
+    machine.send_chars("wayland-info && touch /tmp/success-client-term\n")
     machine.wait_for_file("/tmp/fortify.1000/tmpdir/0/success-client-term")
     machine.screenshot("foot_wayland_permissive_term")
     machine.send_chars("exit\n")
     machine.wait_until_fails("pgrep foot")
 
+    # Test XWayland (foot does not support X):
+    swaymsg("exec fortify run -X alacritty")
+    wait_for_window("u0_a0@machine")
+    machine.send_chars("glinfo && touch /tmp/success-client-x11\n")
+    machine.wait_for_file("/tmp/fortify.1000/tmpdir/0/success-client-x11")
+    machine.screenshot("alacritty_x11_permissive")
+    machine.succeed("pkill alacritty")
+
     # Exit Sway and verify process exit status 0:
     swaymsg("exit", succeed=False)
     machine.wait_until_fails("pgrep -x sway")