Forwarded: no, upstream inactive

--- a/tests/test_stats_plugin_collector.py
+++ b/tests/test_stats_plugin_collector.py
@@ -1,7 +1,7 @@
 import os
 
 import prometheus_client
-from mock import Mock, patch
+from unittest.mock import Mock, patch
 
 from trafficserver_exporter.collector import StatsPluginCollector
 from trafficserver_exporter.trafficserver_exporter import PKG_METRICS_FILE