diff --git a/qt/python/mantidqt/utils/test/test_async.py b/qt/python/mantidqt/utils/test/test_async.py
index 84af30523f2996d7c1abacf8cdadfef70e21f377..6d69ad2508f6b0f2b871b03785999982b65b5f42 100644
--- a/qt/python/mantidqt/utils/test/test_async.py
+++ b/qt/python/mantidqt/utils/test/test_async.py
@@ -106,7 +106,7 @@ class AsyncTaskTest(unittest.TestCase):
 
         self.assertEqual(2, len(recv.task_exc_stack))
         # line number of self.target in asynchronous.py
-        self.assertEqual(68, recv.task_exc_stack[0][1])
+        self.assertEqual(65, recv.task_exc_stack[0][1])
         # line number of raise statement above
         self.assertEqual(93, recv.task_exc_stack[1][1])