diff --git a/pkgs/development/python-modules/aiofile/default.nix b/pkgs/development/python-modules/aiofile/default.nix
index a2c4eaf5ff8e..5d79aaa1bc32 100644
--- a/pkgs/development/python-modules/aiofile/default.nix
+++ b/pkgs/development/python-modules/aiofile/default.nix
@@ -1,9 +1,9 @@
 { lib
 , aiomisc
-, asynctest
 , caio
 , buildPythonPackage
 , fetchFromGitHub
+, fetchpatch
 , pytestCheckHook
 , pythonOlder
 }:
@@ -22,13 +22,20 @@ buildPythonPackage rec {
     hash = "sha256-PIImQZ1ymazsOg8qmlO91tNYHwXqK/d8AuKPsWYvh0w=";
   };
 
+  patches = [
+    (fetchpatch {
+      name = "remove-asynctest.patch";
+      url = "https://github.com/mosquito/aiofile/commit/9253ca42022f17f630ccfb6811f67876910f8b13.patch";
+      hash = "sha256-yMRfqEbdxApFypEj27v1zTgF/4kuLf5aS/+clo3mfZo=";
+    })
+  ];
+
   propagatedBuildInputs = [
     caio
   ];
 
   nativeCheckInputs = [
     aiomisc
-    asynctest
     pytestCheckHook
   ];