diff --git a/functional_tests/test_help.py b/functional_tests/test_help.py
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+++ b/functional_tests/test_help.py
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+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2018 Branko Majic
+#
+# This file is part of Gimmecert.
+#
+# Gimmecert 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.
+#
+# Gimmecert 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
+# Gimmecert.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+
+import subprocess
+
+
+def test_cli_works():
+    # John is a system integrator that in his line of work often needs
+    # to issue certificates for testing. Just recently, he has heard
+    # of a new tool called gimmecert that can be used for issuing
+    # certificates in test environments that would make his life
+    # easier.
+
+    # John goes ahead and installs the tool on his local machine.
+
+    # Before moving on, John decides to quickly test if the package
+    # has been installed correctly. Assuming that the command is the
+    # same as package name, he runs it.
+    process = subprocess.Popen(["gimmecert"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    stdout, stderr = process.communicate()
+    stdout, stderr = stdout.decode(), stderr.decode()
+
+    # John has a look at output, and notices that no error has been
+    # reported. He also verifies the return code is non-zero, just to
+    # be on the safe side.
+    assert stderr == ''
+    assert process.returncode == 0