diff --git a/buildbot/masters/datatracker/master.cfg b/buildbot/masters/datatracker/master.cfg
index ea086bfe3..27510f023 100644
--- a/buildbot/masters/datatracker/master.cfg
+++ b/buildbot/masters/datatracker/master.cfg
@@ -126,7 +126,7 @@ class UnitTest(WarningCountingShellCommand):
     def createSummary(self, log):
         info = {}
         for line in log.getText().split("\n"):
-            for key in regexPatterns:
+            for key in self.regexPatterns:
                 regex = regexPatterns[key]
                 match = re.match(regex, line)
                 if match: