diff --git a/src/kernel/lsm/iterator/merging_iter.rs b/src/kernel/lsm/iterator/merging_iter.rs
index 1cb2eda..9298dc9 100644
--- a/src/kernel/lsm/iterator/merging_iter.rs
+++ b/src/kernel/lsm/iterator/merging_iter.rs
@@ -295,7 +295,7 @@ mod tests {
         );
 
         assert_eq!(
-            merging_iter.seek(Seek::Backward(&vec![b'5']))?,
+            merging_iter.seek(Seek::Backward(&[b'5']))?,
             sequence_iter.next().flatten()
         );
 
diff --git a/src/kernel/lsm/mvcc.rs b/src/kernel/lsm/mvcc.rs
index 5b9a562..25359f4 100644
--- a/src/kernel/lsm/mvcc.rs
+++ b/src/kernel/lsm/mvcc.rs
@@ -82,7 +82,6 @@ impl Transaction {
         if let Some(buf) = self.write_buf.take() {
             let batch_data = buf
                 .into_iter()
-                .map(|(key, value)| (key, value))
                 .collect_vec();
 
             let is_exceeds = self
diff --git a/src/kernel/lsm/table/btree_table/iter.rs b/src/kernel/lsm/table/btree_table/iter.rs
index c4b5361..4b1190b 100644
--- a/src/kernel/lsm/table/btree_table/iter.rs
+++ b/src/kernel/lsm/table/btree_table/iter.rs
@@ -104,7 +104,7 @@ mod tests {
         assert_eq!(iter.seek(Seek::First)?, Some(vec[0].clone()));
 
         assert_eq!(
-            iter.seek(Seek::Backward(&vec![b'3']))?,
+            iter.seek(Seek::Backward(&[b'3']))?,
             Some(vec[2].clone())
         );