diff --git a/tests/test_parse.py b/tests/test_parse.py
index 4974f8d..62ce882 100644
--- a/tests/test_parse.py
+++ b/tests/test_parse.py
@@ -66,7 +66,7 @@ class ParseTestCase(unittest.TestCase):
 
     def test_unsupported_formats_raising(self):
         with self.assertRaises(UnknownFormat):
-            for packet_type in '#$%)*,<?T[_{}':
+            for packet_type in '#$%)*,<?T[_{':
                 packet = "A>B:%saaa" % packet_type
 
                 try:
diff --git a/tests/test_thirdparty.py b/tests/test_thirdparty.py
new file mode 100644
index 0000000..80a9342
--- /dev/null
+++ b/tests/test_thirdparty.py
@@ -0,0 +1,58 @@
+
+import unittest2 as unittest
+
+from aprslib import parse
+from aprslib.exceptions import ParseError, UnknownFormat
+
+
+class thirdpartyTC(unittest.TestCase):
+    def test_empty_subpacket(self):
+        self.assertRaises(ParseError, parse, "A>B:}")
+
+    def test_no_body(self):
+        self.assertRaises(ParseError, parse, "A>B:}C>D")
+
+    def test_empty_body(self):
+        self.assertRaises(ParseError, parse, "A>B:}C>D:")
+
+    def testparse_header_exception(self):
+        self.assertRaises(ParseError, parse, "A>B:}C:asd")
+
+    def test_empty_body_of_format_that_is_not_status(self):
+        self.assertRaises(ParseError, parse, "A>B:}C>D:!")
+
+        try:
+            parse("A>B:}C>D:>")
+        except:
+            self.fail("empty status packet shouldn't raise exception")
+
+    def test_unsupported_formats_raising(self):
+        with self.assertRaises(UnknownFormat):
+            for packet_type in '#$%)*,<?T[_{':
+                packet = "A>B:}C>D:%saaa" % packet_type
+
+                try:
+                    parse(packet)
+                except UnknownFormat as exp:
+                    self.assertEqual(exp.packet, packet)
+                    raise
+
+    def test_valid_thirdparty_msg(self):
+        packet = "A-1>APRS,B-2,WIDE1*:}C>APU25N,TCPIP,A-1*::DEF      :ack56"
+        result = parse(packet)
+        self.assertEqual(result['via'],'')
+        self.assertEqual(result['to'],'APRS')
+        self.assertEqual(result['from'],'A-1')
+        self.assertEqual(result['format'],'thirdparty')
+        self.assertEqual(result['raw'],packet)
+        self.assertEqual(result['path'],['B-2', 'WIDE1*'])
+        self.assertEqual(result['subpacket']['raw'],packet[21:])
+        self.assertEqual(result['subpacket']['via'],'')
+        self.assertEqual(result['subpacket']['msgNo'],'56')
+        self.assertEqual(result['subpacket']['from'],'C')
+        self.assertEqual(result['subpacket']['path'],['TCPIP', 'A-1*'])
+        self.assertEqual(result['subpacket']['response'],'ack')
+        self.assertEqual(result['subpacket']['format'],'message')
+        self.assertEqual(result['subpacket']['to'],'APU25N')
+        self.assertEqual(result['subpacket']['addresse'],'DEF')
+