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diff --git a/test/units/module_utils/facts/system/test_user.py b/test/units/module_utils/facts/system/test_user.py
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+++ b/test/units/module_utils/facts/system/test_user.py
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+# unit tests for ansible system lsb fact collectors
+# -*- coding: utf-8 -*-
+#
+# Ansible 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.
+#
+# Ansible 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 Ansible.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+# Make coding more python3-ish
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+from ansible.module_utils.facts.system.user import UserFactCollector
+
+import os
+
+
+def test_logname():
+    """ Test if ``UserFactCollector`` still works with LOGNAME set """
+    collector = UserFactCollector()
+
+    unmodified_facts = collector.collect()
+    # Change logname env var and check if the collector still finds
+    # the pw entry.
+    os.environ["LOGNAME"] = "NONEXISTINGUSERDONTEXISTPLEASE"
+    modified_facts = collector.collect()
+
+    # Set logname should be different to the real name.
+    assert unmodified_facts['user_id'] != modified_facts['user_id']
+    # Actual UID is the same.
+    assert unmodified_facts['user_uid'] == modified_facts['user_uid']