diff --git a/pkgs/development/python-modules/i3ipc/default.nix b/pkgs/development/python-modules/i3ipc/default.nix
index febac35bc4a4..e63dc1f68c55 100644
--- a/pkgs/development/python-modules/i3ipc/default.nix
+++ b/pkgs/development/python-modules/i3ipc/default.nix
@@ -4,6 +4,7 @@
   fetchFromGitHub,
   xorg,
   pytest,
+  pytest-asyncio,
   pytest-xvfb,
   i3,
   xlib,
@@ -23,12 +24,21 @@ buildPythonPackage rec {
     rev = "v${version}";
     sha256 = "13bzs9dcv27czpnnbgz7a037lm8h991c8gk0qzzk5mq5yak24715";
   };
+
+  patches = [
+    # Upstream expects a very old version of pytest-asyncio. This patch correctly
+    # decorates async fixtures using pytest-asyncio and configures `loop_scope`
+    # where needed.
+    ./fix-async-tests.patch
+  ];
+
   propagatedBuildInputs = [ xlib ];
 
   fontsConf = makeFontsConf { fontDirectories = [ ]; };
   FONTCONFIG_FILE = fontsConf; # Fontconfig error: Cannot load default config file
   nativeCheckInputs = [
     pytest
+    pytest-asyncio
     xdpyinfo
     pytest-xvfb
     xorg.xvfb
diff --git a/pkgs/development/python-modules/i3ipc/fix-async-tests.patch b/pkgs/development/python-modules/i3ipc/fix-async-tests.patch
new file mode 100644
index 000000000000..41407c1d4878
--- /dev/null
+++ b/pkgs/development/python-modules/i3ipc/fix-async-tests.patch
@@ -0,0 +1,28 @@
+diff --git a/test/aio/ipctest.py b/test/aio/ipctest.py
+index 88e4cda..3d0fd9c 100644
+--- a/test/aio/ipctest.py
++++ b/test/aio/ipctest.py
+@@ -1,5 +1,6 @@
+ from subprocess import Popen
+ import pytest
++import pytest_asyncio
+ 
+ from i3ipc.aio import Connection
+ from i3ipc import CommandReply
+@@ -19,7 +20,7 @@ class IpcTest:
+     def event_loop(self):
+         return asyncio.get_event_loop()
+ 
+-    @pytest.fixture(scope='class')
++    @pytest_asyncio.fixture(scope='class', loop_scope='class')
+     async def i3(self):
+         process = Popen(['i3', '-c', 'test/i3.config'])
+         # wait for i3 to start up
+diff --git a/pytest.ini b/pytest.ini
+index 1ea6b80..788bdac 100644
+--- a/pytest.ini
++++ b/pytest.ini
+@@ -1,2 +1,3 @@
+ [pytest]
+ timeout = 5
++asyncio_default_test_loop_scope = class