diff --git a/pkgs/development/python-modules/asynctest/default.nix b/pkgs/development/python-modules/asynctest/default.nix
index d08f4137ba4..d36328d7225 100644
--- a/pkgs/development/python-modules/asynctest/default.nix
+++ b/pkgs/development/python-modules/asynctest/default.nix
@@ -17,6 +17,9 @@ buildPythonPackage rec {
       --replace "test_events_watched_outside_test_are_ignored" "xtest_events_watched_outside_test_are_ignored"
   '';
 
+  # https://github.com/Martiusweb/asynctest/issues/132
+  doCheck = pythonOlder "3.8";
+
   checkPhase = ''
     ${python.interpreter} -m unittest test
   '';