diff --git a/lucene/src/test/org/apache/lucene/index/TestNRTThreads.java b/lucene/src/test/org/apache/lucene/index/TestNRTThreads.java
index f40d653d5eb..b792eca7f35 100644
--- a/lucene/src/test/org/apache/lucene/index/TestNRTThreads.java
+++ b/lucene/src/test/org/apache/lucene/index/TestNRTThreads.java
@@ -22,11 +22,13 @@ import java.util.concurrent.ExecutorService;
 
 import org.apache.lucene.search.IndexSearcher;
 import org.apache.lucene.store.MockDirectoryWrapper;
+import org.apache.lucene.util.LuceneTestCase.UseNoMemoryExpensiveCodec;
 
 // TODO
 //   - mix in optimize, addIndexes
 //   - randomoly mix in non-congruent docs
 
+@UseNoMemoryExpensiveCodec
 public class TestNRTThreads extends ThreadedIndexingAndSearchingTestCase {
   
   @Override