diff --git a/tests/lib/asynctest.py b/tests/lib/asynctest.py
new file mode 100644
index 000000000..2ad40231f
--- /dev/null
+++ b/tests/lib/asynctest.py
@@ -0,0 +1,92 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+# input-remapper - GUI for device specific keyboard mappings
+# Copyright (C) 2023 sezanzeb <proxima@sezanzeb.de>
+#
+# This file is part of input-remapper.
+#
+# input-remapper is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# input-remapper is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with input-remapper.  If not, see <https://www.gnu.org/licenses/>.
+
+
+import time
+import unittest
+from unittest.async_case import TestCase, IsolatedAsyncioTestCase
+import asyncio
+
+
+class AsyncTestBase(IsolatedAsyncioTestCase):
+    async def awaitEqual(self, func, value, *msg, timeout: float = 0.1):
+        await self.awaitTrue(lambda: func() == value, *msg, timeout=timeout)
+
+    async def awaitNotEqual(self, func, value, *msg, timeout: float = 0.1):
+        await self.awaitTrue(lambda: func() != value, *msg, timeout=timeout)
+
+    async def awaitIs(self, func, value, *msg, timeout: float = 0.1):
+        await self.awaitTrue(lambda: func() is value, *msg, timeout=timeout)
+
+    async def awaitIsNot(self, func, value, *msg, timeout: float = 0.1):
+        await self.awaitTrue(lambda: func() is not value, *msg, timeout=timeout)
+
+    async def awaitNone(self, func, *msg, timeout: float = 0.1):
+        await self.awaitTrue(lambda: func() is None, *msg, timeout=timeout)
+
+    async def awaitNotNone(self, func, *msg, timeout: float = 0.1):
+        await self.awaitTrue(lambda: func() is not None, *msg, timeout=timeout)
+
+    async def awaitFalse(self, func, *msg, timeout: float = 0.1):
+        await self.awaitTrue(lambda: func() is False, *msg, timeout=timeout)
+
+    async def awaitTrue(self, func, *msg, timeout: float = 0.1):
+        delay = timeout / 100.0
+
+        async def await_success(delay):
+            while True:
+                try:
+                    if func() is True:
+                        return
+                except Exception as e:
+                    ex = e
+
+                delay *= 1.5  # use exponential delay
+                await asyncio.sleep(delay)
+
+        await asyncio.wait_for(await_success(delay), timeout)
+
+
+class TestAsyncTestBase(AsyncTestBase):
+    def setUp(self):
+        self.text = 1
+
+    async def modify(self, v, delay=0.01):
+        await asyncio.sleep(delay)
+        self.text = v
+
+    async def test_await_delayed_value_change(self):
+        self.assertEqual(self.text, 1)
+        fut = asyncio.create_task(self.modify(2))
+        await self.awaitEqual(lambda: self.text, 2)
+        await fut
+        self.assertEqual(self.text, 2)
+
+    async def test_await_timeout(self):
+        try:
+            await self.awaitEqual(lambda: False, True)
+        except asyncio.exceptions.TimeoutError:
+            pass
+        else:
+            self.fail("awaitEqual must time out")
+
+
+if __name__ == "__main__":
+    asyncio.run(unittest.main())