diff --git a/lucene/sandbox/src/test/org/apache/lucene/bkdtree/TestBKDTree.java b/lucene/sandbox/src/test/org/apache/lucene/bkdtree/TestBKDTree.java
index 71d0aaa08ed..3f3548d6438 100644
--- a/lucene/sandbox/src/test/org/apache/lucene/bkdtree/TestBKDTree.java
+++ b/lucene/sandbox/src/test/org/apache/lucene/bkdtree/TestBKDTree.java
@@ -281,7 +281,7 @@ public class TestBKDTree extends LuceneTestCase {
 
   @Nightly
   public void testRandomBig() throws Exception {
-    doTestRandom(1000000);
+    doTestRandom(200000);
   }
 
   private void doTestRandom(int count) throws Exception {