diff --git a/libqtile/command/interface.py b/libqtile/command/interface.py
index 171588c4ad..fa8cf72b76 100644
--- a/libqtile/command/interface.py
+++ b/libqtile/command/interface.py
@@ -28,7 +28,7 @@
 import types
 import typing
 from abc import ABCMeta, abstractmethod
-from typing import TYPE_CHECKING, Any, Literal, get_args, get_origin
+from typing import TYPE_CHECKING, Any, Literal, Union, get_args, get_origin
 
 from libqtile import ipc
 from libqtile.command.base import CommandError, CommandException, CommandObject, SelectError
@@ -309,7 +309,7 @@ def lift_args(cmd, args, kwargs):
 
     def lift_arg(typ, arg):
         # for stuff like int | None, allow either
-        if get_origin(typ) in [types.UnionType, typing.Union]:
+        if get_origin(typ) in [types.UnionType, Union]:
             for t in get_args(typ):
                 if t == types.NoneType:
                     # special case None? I don't know what this looks like
diff --git a/test/test_command.py b/test/test_command.py
index d31baff360..d43faac214 100644
--- a/test/test_command.py
+++ b/test/test_command.py
@@ -68,6 +68,7 @@ class CallConfig(Config):
             bottom=libqtile.bar.Bar(
                 [
                     libqtile.widget.GroupBox(),
+                    libqtile.widget.TextBox(),
                 ],
                 20,
             ),
@@ -110,6 +111,12 @@ def test_param_hoisting(manager):
 
     cmd_client.call("hide_show_bar", position="top", lifted=True)
 
+    # 'zomg' is not a valid font size
+    with pytest.raises(IPCError):
+        cmd_client.navigate("widget", "textbox").call("set_font", fontsize="zomg", lifted=True)
+
+    cmd_client.navigate("widget", "textbox").call("set_font", fontsize=12, lifted=True)
+
 
 class FakeCommandObject(CommandObject):
     @staticmethod