diff --git a/tests/test_script.py b/tests/test_script.py
index a83bc07f..d17a83bb 100644
--- a/tests/test_script.py
+++ b/tests/test_script.py
@@ -192,7 +192,7 @@ def start_watching(self):
 
     def stop_watching(self):
         """Stop the watch command thread."""
-        assert self.t.isAlive() # If it has already ended, something is wrong
+        assert self.t.is_alive() # If it has already ended, something is wrong
         self.stopped = True
         self.t.join(1)