diff --git a/pkgs/development/python-modules/async-modbus/default.nix b/pkgs/development/python-modules/async-modbus/default.nix
index 83efbef9a9cb..dcc5a4247a6f 100644
--- a/pkgs/development/python-modules/async-modbus/default.nix
+++ b/pkgs/development/python-modules/async-modbus/default.nix
@@ -4,6 +4,7 @@
   connio,
   fetchFromGitHub,
   fetchpatch,
+  pytest-asyncio,
   pytest-cov-stub,
   pytestCheckHook,
   pythonOlder,
@@ -46,6 +47,7 @@ buildPythonPackage rec {
   ];
 
   nativeCheckInputs = [
+    pytest-asyncio
     pytest-cov-stub
     pytestCheckHook
   ];