diff --git a/src/indexer/merger.rs b/src/indexer/merger.rs
index e8c3babbd..9385320c7 100644
--- a/src/indexer/merger.rs
+++ b/src/indexer/merger.rs
@@ -683,7 +683,7 @@ mod tests {
         };
 
         {
-            let mut index_writer = index.writer_with_num_threads(1, 40_000_000).unwrap();
+            let mut index_writer = index.writer_with_num_threads(1, 3_000_000).unwrap();
             {
                 // writing the segment
                 {
@@ -733,7 +733,7 @@ mod tests {
             let segment_ids = index
                 .searchable_segment_ids()
                 .expect("Searchable segments failed.");
-            let mut index_writer = index.writer_with_num_threads(1, 40_000_000).unwrap();
+            let mut index_writer = index.writer_with_num_threads(1, 3_000_000).unwrap();
             index_writer
                 .merge(&segment_ids)
                 .wait()