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diff --git a/src/mailman/commands/tests/test_shell.py b/src/mailman/commands/tests/test_shell.py
new file mode 100644
index 000000000..153591f5a
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+++ b/src/mailman/commands/tests/test_shell.py
@@ -0,0 +1,74 @@
+# Copyright (C) 2016 by the Free Software Foundation, Inc.
+#
+# This file is part of GNU Mailman.
+#
+# GNU Mailman is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Test the withlist/shell command."""
+
+import os
+import unittest
+
+from mailman.commands.cli_withlist import Withlist
+from mailman.config import config
+from mailman.interfaces.usermanager import IUserManager
+from mailman.testing.helpers import configuration
+from mailman.testing.layers import ConfigLayer
+from unittest.mock import patch
+
+
+class FakeArgs:
+    interactive = None
+    run = None
+    details = False
+    listname = None
+
+
+class TestShell(unittest.TestCase):
+    layer = ConfigLayer
+
+    def setUp(self):
+        self._shell = Withlist()
+
+    def test_namespace(self):
+        args = FakeArgs()
+        args.interactive = True
+        with patch.object(self._shell, '_start_python') as mock:
+            self._shell.process(args)
+        self.assertEqual(mock.call_count, 1)
+        # Don't test that all names are available, just a few choice ones.
+        positional, keywords = mock.call_args
+        namespace = positional[0]
+        self.assertIn('getUtility', namespace)
+        self.assertIn('IArchiver', namespace)
+        self.assertEqual(namespace['IUserManager'], IUserManager)
+
+    @configuration('shell', banner='my banner')
+    def test_banner(self):
+        args = FakeArgs()
+        args.interactive = True
+        with patch('mailman.commands.cli_withlist.interact') as mock:
+            self._shell.process(args)
+        self.assertEqual(mock.call_count, 1)
+        positional, keywords = mock.call_args
+        self.assertEqual(keywords['banner'], 'my banner\n')
+
+    @configuration('shell', history_file='$var_dir/history.py')
+    def test_history_file(self):
+        args = FakeArgs()
+        args.interactive = True
+        with patch('mailman.commands.cli_withlist.interact'):
+            self._shell.process(args)
+        history_file = os.path.join(config.VAR_DIR, 'history.py')
+        self.assertTrue(os.path.exists(history_file))