diff --git a/services/commtest/tests/backup/pull_backup.rs b/services/commtest/tests/backup/pull_backup.rs
--- a/services/commtest/tests/backup/pull_backup.rs
+++ b/services/commtest/tests/backup/pull_backup.rs
@@ -3,8 +3,8 @@
 #[path = "../lib/tools.rs"]
 mod tools;
 
-use tonic::Request;
 use std::io::{Error as IOError, ErrorKind};
+use tonic::Request;
 
 use crate::backup_utils::{
   proto::pull_backup_response::Data, proto::pull_backup_response::Data::*,
@@ -63,7 +63,10 @@
           "invalid state, expected compaction, got {:?}",
           state
         );
-        current_id = backup_id.ok_or(IOError::new(ErrorKind::Other, "backup id expected but not received"))?;
+        current_id = backup_id.ok_or(IOError::new(
+          ErrorKind::Other,
+          "backup id expected but not received",
+        ))?;
         println!(
           "compaction (id {}), pushing chunk (size: {})",
           current_id,
@@ -76,7 +79,10 @@
           state = State::Log;
         }
         assert_eq!(state, State::Log, "invalid state, expected compaction");
-        let log_id = log_id.ok_or(IOError::new(ErrorKind::Other, "log id expected but not received"))?;
+        let log_id = log_id.ok_or(IOError::new(
+          ErrorKind::Other,
+          "log id expected but not received",
+        ))?;
         if log_id != current_id {
           result.log_items.push(Item::new(
             log_id.clone(),
diff --git a/services/commtest/tests/backup_test.rs b/services/commtest/tests/backup_test.rs
--- a/services/commtest/tests/backup_test.rs
+++ b/services/commtest/tests/backup_test.rs
@@ -61,10 +61,7 @@
       // a big item that should be placed in the S3 right away
       Item::new(
         String::new(),
-        vec![
-          *tools::GRPC_CHUNK_SIZE_LIMIT,
-          *tools::GRPC_CHUNK_SIZE_LIMIT,
-        ],
+        vec![*tools::GRPC_CHUNK_SIZE_LIMIT, *tools::GRPC_CHUNK_SIZE_LIMIT],
         vec![
           "holder0".to_string(),
           "holder1".to_string(),
diff --git a/services/commtest/tests/lib/tools.rs b/services/commtest/tests/lib/tools.rs
--- a/services/commtest/tests/lib/tools.rs
+++ b/services/commtest/tests/lib/tools.rs
@@ -25,8 +25,10 @@
 pub const GRPC_METADATA_SIZE_BYTES: usize = 5;
 
 lazy_static! {
-  pub static ref DYNAMO_DB_ITEM_SIZE_LIMIT: usize = ByteSize::kib(400).as_u64() as usize;
-  pub static ref GRPC_CHUNK_SIZE_LIMIT: usize = (ByteSize::mib(4).as_u64() as usize) - GRPC_METADATA_SIZE_BYTES;
+  pub static ref DYNAMO_DB_ITEM_SIZE_LIMIT: usize =
+    ByteSize::kib(400).as_u64() as usize;
+  pub static ref GRPC_CHUNK_SIZE_LIMIT: usize =
+    (ByteSize::mib(4).as_u64() as usize) - GRPC_METADATA_SIZE_BYTES;
 }
 
 #[allow(dead_code)]