diff --git a/tests/test_world_map.py b/tests/test_world_map.py
new file mode 100644
index 0000000..aff1108
--- /dev/null
+++ b/tests/test_world_map.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+
+#    Copyright (C) 2018 Christian Thomas Jacobs.
+
+#    This file is part of PyQSO.
+
+#    PyQSO 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.
+#
+#    PyQSO 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 PyQSO.  If not, see <http://www.gnu.org/licenses/>.
+
+import unittest
+import os
+from pyqso.world_map import *
+
+
+class TestMaidenhead(unittest.TestCase):
+
+    """ The unit tests for the Maidenhead class. """
+
+    def setUp(self):
+        """ Set up the Maidenhead object needed for the unit tests. """
+        self.maidenhead = Maidenhead()
+
+    def test_ll2gs(self):
+        """ Check that a latitude-longitude coordinate can correctly be converted to a Maidenhead grid square. """
+        latitude = 51.0593
+        longitude = -1.4262
+        assert self.maidenhead.ll2gs(latitude, longitude, subsquare=False) == "IO91"
+        assert self.maidenhead.ll2gs(latitude, longitude, subsquare=True) == "IO91gb"
+
+    def test_gs2ll(self):
+        gs4 = "JN05"
+        assert self.maidenhead.gs2ll(gs4) == (45.5, 1.0)
+        gs6 = "JN05aa"
+        assert self.maidenhead.gs2ll(gs6) == (45.020833333333336, 0.041666666666666664)
+        gs6 = "IO91gb"
+        print(self.maidenhead.gs2ll(gs6))
+        assert self.maidenhead.gs2ll(gs6) == (51.0625, -1.4583333333333335)
+
+if(__name__ == '__main__'):
+    unittest.main()