diff --git a/segment/analytics/oauth_manager.py b/segment/analytics/oauth_manager.py
index 6d078e4..ab10350 100644
--- a/segment/analytics/oauth_manager.py
+++ b/segment/analytics/oauth_manager.py
@@ -15,10 +15,10 @@ def __init__(self,
                  client_id,
                  client_key,
                  key_id,
-                 auth_server,
-                 scope,
-                 timeout,
-                 max_retries):
+                 auth_server='https://oauth2.segment.io',
+                 scope='tracking_api:write',
+                 timeout=5,
+                 max_retries=3):
         self.client_id = client_id
         self.client_key = client_key
         self.key_id = key_id
@@ -44,7 +44,7 @@ def get_token(self):
         if self.thread and self.thread.is_alive():
             self.thread.cancel()
         self.thread = threading.Timer(0,self._poller_loop)
-        self.thread.setDaemon(True)
+        self.thread.daemon = True
         self.thread.start()
 
         while True:
@@ -106,7 +106,7 @@ def _poller_loop(self):
             if self.retry_count < self.max_retries:
                 self.log.error("OAuth token request encountered an error on attempt {}: {}".format(self.retry_count ,e))
                 self.thread = threading.Timer(refresh_timer_ms / 1000.0, self._poller_loop)
-                self.thread.setDaemon(True)
+                self.thread.daemon = True
                 self.thread.start()
                 return
             # Too many retries, giving up
@@ -122,7 +122,7 @@ def _poller_loop(self):
                 self.retry_count += 1
                 if self.retry_count < self.max_retries:
                     self.thread = threading.Timer(refresh_timer_ms / 1000.0, self._poller_loop)
-                    self.thread.setDaemon(True)
+                    self.thread.daemon = True
                     self.thread.start()
                     return
                 # Too many retries, giving up
@@ -177,5 +177,5 @@ def _poller_loop(self):
 
         # loop
         self.thread = threading.Timer(refresh_timer_ms / 1000.0, self._poller_loop)
-        self.thread.setDaemon(True)
+        self.thread.daemon = True
         self.thread.start()
diff --git a/segment/analytics/test/__init__.py b/segment/analytics/test/__init__.py
index 4103ff5..98ad6aa 100644
--- a/segment/analytics/test/__init__.py
+++ b/segment/analytics/test/__init__.py
@@ -31,6 +31,7 @@ def test_debug(self):
         analytics.debug = False
         analytics.flush()
         self.assertFalse(analytics.default_client.debug)
+        analytics.default_client.log.setLevel(0) # reset log level after debug enable
 
     def test_gzip(self):
         self.assertIsNone(analytics.default_client)
@@ -44,9 +45,11 @@ def test_gzip(self):
 
     def test_host(self):
         self.assertIsNone(analytics.default_client)
-        analytics.host = 'test-host'
+        analytics.host = 'http://test-host'
         analytics.flush()
-        self.assertEqual(analytics.default_client.host, 'test-host')
+        self.assertEqual(analytics.default_client.host, 'http://test-host')
+        analytics.host = None
+        analytics.default_client = None
 
     def test_max_queue_size(self):
         self.assertIsNone(analytics.default_client)
@@ -79,3 +82,6 @@ def test_timeout(self):
     def setUp(self):
         analytics.write_key = 'test-init'
         analytics.default_client = None
+
+if __name__ == '__main__':
+    unittest.main()
\ No newline at end of file
diff --git a/segment/analytics/test/client.py b/segment/analytics/test/client.py
index 20bdd9f..bffdb1e 100644
--- a/segment/analytics/test/client.py
+++ b/segment/analytics/test/client.py
@@ -294,6 +294,7 @@ def test_numeric_user_id(self):
 
     def test_debug(self):
         Client('bad_key', debug=True)
+        self.client.log.setLevel(0) # reset log level after debug enable
 
     def test_identify_with_date_object(self):
         client = self.client