diff --git a/lucene/core/src/test/org/apache/lucene/search/TestKnnVectorQuery.java b/lucene/core/src/test/org/apache/lucene/search/TestKnnVectorQuery.java
index 88d2b3674fb..df7f03f1901 100644
--- a/lucene/core/src/test/org/apache/lucene/search/TestKnnVectorQuery.java
+++ b/lucene/core/src/test/org/apache/lucene/search/TestKnnVectorQuery.java
@@ -833,7 +833,7 @@ public class TestKnnVectorQuery extends LuceneTestCase {
    */
   private Directory getStableIndexStore(String field, float[]... contents) throws IOException {
     Directory indexStore = newDirectory();
-    try (IndexWriter writer = new IndexWriter(indexStore, newIndexWriterConfig())) {
+    try (IndexWriter writer = new IndexWriter(indexStore, new IndexWriterConfig())) {
       VectorEncoding encoding = randomVectorEncoding();
       for (int i = 0; i < contents.length; ++i) {
         Document doc = new Document();