diff --git a/pkgs/development/python-modules/dynalite-devices/default.nix b/pkgs/development/python-modules/dynalite-devices/default.nix
index 456e0a6a628d..ed3f3ffb82ab 100644
--- a/pkgs/development/python-modules/dynalite-devices/default.nix
+++ b/pkgs/development/python-modules/dynalite-devices/default.nix
@@ -28,7 +28,7 @@ buildPythonPackage rec {
   ];
 
   pytestFlagsArray = [
-    "--asyncio-mode=legacy"
+    "--asyncio-mode=auto"
   ];
 
   pythonImportsCheck = [ "dynalite_devices_lib" ];