diff --git a/lucene/core/src/test/org/apache/lucene/index/TestIndexWriterDelete.java b/lucene/core/src/test/org/apache/lucene/index/TestIndexWriterDelete.java
index 2ea4e9e70ca..a92c4902ae4 100644
--- a/lucene/core/src/test/org/apache/lucene/index/TestIndexWriterDelete.java
+++ b/lucene/core/src/test/org/apache/lucene/index/TestIndexWriterDelete.java
@@ -891,9 +891,12 @@ public class TestIndexWriterDelete extends LuceneTestCase {
   }
   
   public void testIndexingThenDeleting() throws Exception {
+    // TODO: move this test to its own class and just @SuppressCodecs?
+    // TODO: is it enough to just use newFSDirectory?
     final String fieldFormat = _TestUtil.getPostingsFormat("field");
     assumeFalse("This test cannot run with Memory codec", fieldFormat.equals("Memory"));
     assumeFalse("This test cannot run with SimpleText codec", fieldFormat.equals("SimpleText"));
+    assumeFalse("This test cannot run with Direct codec", fieldFormat.equals("Direct"));
     final Random r = random();
     Directory dir = newDirectory();
     // note this test explicitly disables payloads