diff --git a/nixos/tests/xmonad.nix b/nixos/tests/xmonad.nix
index c2e5ba60d7b..ab3888ca43f 100644
--- a/nixos/tests/xmonad.nix
+++ b/nixos/tests/xmonad.nix
@@ -27,13 +27,13 @@ import ./make-test-python.nix ({ pkgs, ...} : {
     machine.wait_for_x()
     machine.wait_for_file("${user.home}/.Xauthority")
     machine.succeed("xauth merge ${user.home}/.Xauthority")
-    machine.send_chars("alt-ctrl-x")
+    machine.send_key("alt-ctrl-x")
     machine.wait_for_window("${user.name}.*machine")
     machine.sleep(1)
     machine.screenshot("terminal")
     machine.wait_until_succeeds("xmonad --restart")
     machine.sleep(3)
-    machine.send_chars("alt-shift-ret")
+    machine.send_key("alt-shift-ret")
     machine.wait_for_window("${user.name}.*machine")
     machine.sleep(1)
     machine.screenshot("terminal")