commit c73792c2e55e4fbdff78a192a991e064a317e840
Author: Tim Burke <tim.burke@gmail.com>
Date:   Mon Sep 21 16:40:05 2020 -0700

    tests: Make test_delete_container_versions less flakey
    
    Hammering that test in a tight loop, I'd often see failures due to
    ordering issues. Make the delete single-threaded to avoid that.
    
    Change-Id: Iff45be32a7c3f258214cce78001fd33ad0a39b8c

diff --git a/test/unit/test_shell.py b/test/unit/test_shell.py
index f94e5e2..46ba52c 100644
--- a/test/unit/test_shell.py
+++ b/test/unit/test_shell.py
@@ -1547,7 +1547,7 @@ class TestShell(unittest.TestCase):
             [None, []],
         ]
         connection.return_value.attempts = 0
-        argv = ["", "delete", "--versions", "container"]
+        argv = ["", "delete", "--versions", "container", "--object-threads=1"]
         connection.return_value.head_object.return_value = {}
         swiftclient.shell.main(argv)
         connection.return_value.delete_container.assert_called_with(