diff --git a/buildbot/osuosl/master/master.cfg b/buildbot/osuosl/master/master.cfg
index 3552d1c79..9f2167695 100644
--- a/buildbot/osuosl/master/master.cfg
+++ b/buildbot/osuosl/master/master.cfg
@@ -26,10 +26,10 @@ c['buildbotNetUsageData'] = None
 import config
 reload(config)
 
-# Detect if the BUILDMASTER_TEST environment variable is set and non-zero.
-# This will be used to enable a local testing mode.
-buildmaster_test = os.environ.get('BUILDMASTER_TEST')
-test_mode = bool(buildmaster_test) and buildmaster_test != '0'
+# Detect if the BUILDBOT_TEST environment variable is set and non-zero. This
+# will be used to enable a local testing mode.
+buildbot_test = os.environ.get('BUILDBOT_TEST')
+test_mode = bool(buildbot_test) and buildbot_test != '0'
 config.options['Internal'] = {}
 config.options['Internal']['test_mode'] = str(test_mode)