diff --git a/ogn/aprs_utils.py b/ogn/aprs_utils.py
index a797e2e..6444043 100644
--- a/ogn/aprs_utils.py
+++ b/ogn/aprs_utils.py
@@ -1,4 +1,4 @@
-from datetime import *
+from datetime import datetime, timedelta
 import math
 
 
@@ -32,5 +32,5 @@ def createTimestamp(hhmmss, reference):
     elif (reference.hour == 0) & (hh == 23):
         reference = reference - timedelta(days=1)
     elif (abs(reference.hour - hh) > 1):
-        raise Exception("Time difference is big. Reference time:%s - timestamp:%s" % (reference, hhmmss))
+        raise Exception("Time difference is too big. Reference time:%s - timestamp:%s" % (reference, hhmmss))
     return datetime(reference.year, reference.month, reference.day, hh, mm, ss)
diff --git a/tests/test_aprs_utils.py b/tests/test_aprs_utils.py
index 694cfb6..e24f361 100644
--- a/tests/test_aprs_utils.py
+++ b/tests/test_aprs_utils.py
@@ -1,10 +1,14 @@
 from datetime import datetime
 import unittest
 
-from ogn.aprs_utils import createTimestamp
+from ogn.aprs_utils import dmsToDeg, createTimestamp
 
 
 class TestStringMethods(unittest.TestCase):
+    def test_dmsToDeg(self):
+        dms = 50.4830
+        self.assertAlmostEqual(dmsToDeg(dms), 50.805, 5)
+
     def test_createTimestamp_seconds_behind(self):
         timestamp = createTimestamp('235959', datetime(2015, 10, 16,  0,  0,  1))
         self.assertEqual(timestamp,           datetime(2015, 10, 15, 23, 59, 59))