diff --git a/tests/conftest.py b/tests/conftest.py
index ec47c86..174aebf 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -60,7 +60,7 @@ def serve():
log.debug("shutting server down")
server.shutdown()
worker.join(1)
- if worker.isAlive():
+ if worker.is_alive():
log.warning('worker is hanged')
else:
log.debug("server stopped")