Adjust test case to use deque too

locust/test/test_runners.py

@@ -35,7 +35,7 @@
 import random
 import time
 import unittest
-from collections import defaultdict
+from collections import defaultdict, deque
 from operator import itemgetter
 from unittest import mock
 
@@ -2984,7 +2984,7 @@ def test_exception_is_caught(self):
         class MyTaskSet(TaskSet):
             def __init__(self, *a, **kw):
                 super().__init__(*a, **kw)
-                self._task_queue = [self.will_error, self.will_stop]
+                self._task_queue = deque([self.will_error, self.will_stop])
 
             @task(1)
             def will_error(self):