diff --git a/.travis.yml b/.travis.yml
index 8d73e7571..57d7b1ac0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -33,7 +33,8 @@ install:
   - pip install .
 
 script:
-  - pip install mock pylint
+  - pip install cython
+  - pip install mock pylint unqlite
   - ./run_pylint.sh
   - ./run_tests.sh
   - rvm use 2.3.1 && gem install danger --version '~> 4.0' && danger; fi
diff --git a/lbrynet/core/utils.py b/lbrynet/core/utils.py
index 9f508179e..9aa6deae0 100644
--- a/lbrynet/core/utils.py
+++ b/lbrynet/core/utils.py
@@ -2,10 +2,8 @@ import base64
 import datetime
 import logging
 import random
-import os
 import socket
 import string
-import sys
 
 import pkg_resources
 
diff --git a/lbrynet/lbrynet_daemon/auth/server.py b/lbrynet/lbrynet_daemon/auth/server.py
index 65d2e6342..65e0a604f 100644
--- a/lbrynet/lbrynet_daemon/auth/server.py
+++ b/lbrynet/lbrynet_daemon/auth/server.py
@@ -10,7 +10,7 @@ from twisted.internet.error import ConnectionDone, ConnectionLost
 from txjsonrpc import jsonrpclib
 
 from lbrynet import conf
-from lbrynet.core.Error import InvalidAuthenticationToken, InvalidHeaderError
+from lbrynet.core.Error import InvalidAuthenticationToken
 from lbrynet.core import utils
 from lbrynet.lbrynet_daemon.auth.util import APIKey, get_auth_message, jsonrpc_dumps_pretty
 from lbrynet.lbrynet_daemon.auth.client import LBRY_SECRET