diff --git a/printNumbers/test_gt.py b/printNumbers/test_gt.py
new file mode 100644
index 0000000..86845e6
--- /dev/null
+++ b/printNumbers/test_gt.py
@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+#
+# test_gt.py
+
+# Unit test: 'g'.
+
+import sys, os
+sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
+
+import unittest
+from functions.g import *
+
+class TestFactorial(unittest.TestCase):
+
+    def test_value_0(self):
+        self.assertEqual(g(0), 0)
+
+    def test_value_1(self):
+        self.assertEqual(g(1), 4.505223801027239e-17 )
+
+
+def suite():
+    suite = unittest.makeSuite(Testg, 'test')
+    return suite
+
+def run():
+    runner = unittest.TextTestRunner(verbosity = 2)
+    runner.run(suite())
+
+if __name__ == "__main__":
+    run()