diff --git a/fmm/src/field_translation/source_to_target.rs b/fmm/src/field_translation/source_to_target.rs
index 4fd5aa98..9cdebbcc 100644
--- a/fmm/src/field_translation/source_to_target.rs
+++ b/fmm/src/field_translation/source_to_target.rs
@@ -464,7 +464,7 @@ pub mod uniform {
 
             let level_locals = self.level_locals[level as usize]
                 .iter()
-                .map(|l| Mutex::new(l))
+                .map(Mutex::new)
                 .collect_vec();
 
             (0..316).into_par_iter().for_each(|c_idx| {
@@ -619,7 +619,7 @@ pub mod uniform {
 
                 let level_locals = self.level_locals[level as usize]
                     .iter()
-                    .map(|inner_vec| Mutex::new(inner_vec))
+                    .map(Mutex::new)
                     .collect_vec();
 
                 (0..316).into_par_iter().for_each(|c_idx| {
@@ -652,8 +652,6 @@ pub mod uniform {
                         if save_idx > -1 {
                             let save_idx = save_idx as usize;
                             for charge_vec_idx in 0..self.ncharge_vectors {
-                                // let local_ptr =
-                                //     self.level_locals[level as usize][save_idx][charge_vec_idx].raw;
                                 let local_lock = level_locals[save_idx].lock().unwrap();
                                 let local_send_ptr = local_lock[charge_vec_idx];
                                 let local_ptr = local_send_ptr.raw;
diff --git a/fmm/src/fmm.rs b/fmm/src/fmm.rs
index 8b16df4c..8235081e 100644
--- a/fmm/src/fmm.rs
+++ b/fmm/src/fmm.rs
@@ -818,7 +818,7 @@ mod test {
                 test_idx_vec.push(idx);
             }
         }
-        let leaf = &datatree.fmm.tree().get_all_leaves().unwrap()[test_idx_vec[3]];
+        let leaf = &datatree.fmm.tree().get_all_leaves().unwrap()[test_idx_vec[0]];
 
         let leaf_idx = datatree.fmm.tree().get_leaf_index(leaf).unwrap();
 
@@ -907,7 +907,7 @@ mod test {
                 test_idx_vec.push(idx);
             }
         }
-        let leaf = &datatree.fmm.tree().get_all_leaves().unwrap()[test_idx_vec[3]];
+        let leaf = &datatree.fmm.tree().get_all_leaves().unwrap()[test_idx_vec[0]];
 
         let leaf_idx = datatree.fmm.tree().get_leaf_index(leaf).unwrap();
 
@@ -950,7 +950,7 @@ mod test {
             "rel_error = {rel_error} = {abs_error} / {}",
             direct.iter().sum::<f64>()
         );
-        assert!(rel_error <= 1e-3);
+        assert!(rel_error <= 1e-5);
     }
 
     #[allow(clippy::too_many_arguments)]
@@ -1169,7 +1169,7 @@ mod test {
                 test_idx_vec.push(idx);
             }
         }
-        let leaf = &datatree.fmm.tree().get_all_leaves().unwrap()[test_idx_vec[3]];
+        let leaf = &datatree.fmm.tree().get_all_leaves().unwrap()[test_idx_vec[0]];
 
         let &leaf_idx = datatree.fmm.tree().get_leaf_index(leaf).unwrap();
         let (l, r) = datatree.charge_index_pointer[leaf_idx];