diff --git a/db/external_sst_file_basic_test.cc b/db/external_sst_file_basic_test.cc
index 0d260fbf5ce..67d8551c10f 100644
--- a/db/external_sst_file_basic_test.cc
+++ b/db/external_sst_file_basic_test.cc
@@ -674,6 +674,9 @@ TEST_F(ExternalSSTFileBasicTest, NoCopy) {
   ASSERT_EQ(file3_info.smallest_key, Key(110));
   ASSERT_EQ(file3_info.largest_key, Key(124));
 
+  ASSERT_OK(dbfull()->LockWAL());
+  // With below line, ingestion will block, without it, ingestion can go through.
+  // ASSERT_OK(dbfull()->Put(WriteOptions(), "vo", "vo"));
   s = DeprecatedAddFile({file1}, true /* move file */);
   ASSERT_OK(s) << s.ToString();
   ASSERT_EQ(Status::NotFound(), env_->FileExists(file1));