diff --git a/test/framework/src/main/java/org/elasticsearch/common/logging/TestThreadInfoPatternConverter.java b/test/framework/src/main/java/org/elasticsearch/common/logging/TestThreadInfoPatternConverter.java
index f6732c19eed4c..532b3884a934e 100644
--- a/test/framework/src/main/java/org/elasticsearch/common/logging/TestThreadInfoPatternConverter.java
+++ b/test/framework/src/main/java/org/elasticsearch/common/logging/TestThreadInfoPatternConverter.java
@@ -59,7 +59,7 @@ static String threadInfo(String threadName) {
         Matcher m = ELASTICSEARCH_THREAD_NAME_PATTERN.matcher(threadName);
         if (m.matches()) {
             // Thread looks like a node thread so use the node name
-            return m.group(1);
+            return threadName.substring(13);
         }
         m = TEST_THREAD_NAME_PATTERN.matcher(threadName);
         if (m.matches()) {