diff --git a/lucene/core/src/test/org/apache/lucene/index/TestConcurrentMergeScheduler.java b/lucene/core/src/test/org/apache/lucene/index/TestConcurrentMergeScheduler.java
index 91d563f4764..fd7d35938f8 100644
--- a/lucene/core/src/test/org/apache/lucene/index/TestConcurrentMergeScheduler.java
+++ b/lucene/core/src/test/org/apache/lucene/index/TestConcurrentMergeScheduler.java
@@ -300,6 +300,9 @@ public class TestConcurrentMergeScheduler extends LuceneTestCase {
         }
       }
       };
+    if (maxMergeThreads > cms.getMaxMergeCount()) {
+      cms.setMaxMergeCount(maxMergeCount);
+    }
     cms.setMaxThreadCount(maxMergeThreads);
     cms.setMaxMergeCount(maxMergeCount);
     iwc.setMergeScheduler(cms);