diff --git a/buildbot/masters/datatracker/master.cfg b/buildbot/masters/datatracker/master.cfg
index 27510f023..890f479a7 100644
--- a/buildbot/masters/datatracker/master.cfg
+++ b/buildbot/masters/datatracker/master.cfg
@@ -127,7 +127,7 @@ class UnitTest(WarningCountingShellCommand):
         info = {}
         for line in log.getText().split("\n"):
             for key in self.regexPatterns:
-                regex = regexPatterns[key]
+                regex = self.regexPatterns[key]
                 match = re.match(regex, line)
                 if match:
                     info[key] = match.group(1)