diff --git a/tests/authtests2.py b/tests/authtests2.py
new file mode 100644
index 0000000..0b2ba07
--- /dev/null
+++ b/tests/authtests2.py
@@ -0,0 +1,63 @@
+# -*- coding: latin-1 -*-
+
+import spotipy
+from  spotipy import util
+import unittest
+import pprint
+import sys
+import simplejson as json
+from spotipy.oauth2 import SpotifyClientCredentials
+
+'''
+    Since these tests require authentication they are maintained
+    separately from the other tests.
+
+    These tests try to be benign and leave your collection and
+    playlists in a relatively stable state.
+'''
+
+class AuthTestSpotipy(unittest.TestCase):
+    '''
+        These tests require user authentication
+    '''
+
+    playlist = "spotify:user:plamere:playlist:2oCEWyyAPbZp9xhVSxZavx"
+    four_tracks = ["spotify:track:6RtPijgfPKROxEzTHNRiDp", 
+                "spotify:track:7IHOIqZUUInxjVkko181PB",
+                "4VrWlk8IQxevMvERoX08iC", 
+                "http://open.spotify.com/track/3cySlItpiPiIAzU3NyHCJf"]
+
+    two_tracks = ["spotify:track:6RtPijgfPKROxEzTHNRiDp", 
+                "spotify:track:7IHOIqZUUInxjVkko181PB"]
+
+    other_tracks=["spotify:track:2wySlB6vMzCbQrRnNGOYKa", 
+            "spotify:track:29xKs5BAHlmlX1u4gzQAbJ",
+            "spotify:track:1PB7gRWcvefzu7t3LJLUlf"]
+
+    bad_id = 'BAD_ID'
+
+
+    def test_audio_features(self):
+        print "test audio features"
+        results = spotify.audio_features(self.four_tracks)
+        self.assertTrue(len(results) == len(self.four_tracks))
+        for track in results:
+            assert('speechiness' in track)
+
+    def test_audio_features_with_bad_track(self):
+        bad_tracks = []
+        bad_tracks = ['spotify:track:bad']
+        input = bad_tracks + self.four_tracks + bad_tracks
+        results = spotify.audio_features(input)
+        print(json.dumps(results, indent=4))
+        self.assertTrue(len(results) == len(input))
+        for track in results[:-1]:
+            assert('speechiness' in track)
+        self.assertTrue(results[-1] == None)
+
+
+if __name__ == '__main__':
+    client_credentials_manager = SpotifyClientCredentials()
+    spotify = spotipy.Spotify(client_credentials_manager=client_credentials_manager)
+    spotify.trace = False
+    unittest.main()