diff --git a/tests/test_aprs_parser.py b/tests/test_aprs_parser.py
index 4d29fc1..1056576 100644
--- a/tests/test_aprs_parser.py
+++ b/tests/test_aprs_parser.py
@@ -1,5 +1,8 @@
 import unittest
+import unittest.mock as mock
+
 from datetime import datetime
+from time import sleep
 
 from ogn.aprs_parser import parse_aprs
 from ogn.exceptions import AprsParseError, OgnParseError
@@ -33,6 +36,19 @@ class TestStringMethods(unittest.TestCase):
             parse_aprs("Lachens>APRS,TCPIP*,qAC,GLIDERN2:/165334h4344.70NI00639.19E&/A=005435 v0.2.1 CPU:0.3 RAM:1764.4/21",
                        datetime(2015, 4, 10, 16, 54))
 
+    @mock.patch('ogn.aprs_parser.Beacon')
+    def test_default_reference_date(self, beacon_mock):
+        instance = beacon_mock.return_value
+        valid_aprs_string = "Lachens>APRS,TCPIP*,qAC,GLIDERN2:/165334h4344.70NI00639.19E&/A=005435 v0.2.1 CPU:0.3 RAM:1764.4/21"
+
+        parse_aprs(valid_aprs_string)
+        call_args = instance.parse.call_args
+        sleep(1)
+        parse_aprs(valid_aprs_string)
+        call_args_one_second_later = instance.parse.call_args
+
+        self.assertNotEqual(call_args, call_args_one_second_later)
+
 
 if __name__ == '__main__':
     unittest.main()