diff --git a/tools/spanner/purge_ttl.py b/tools/spanner/purge_ttl.py
index 92cfcd79ed..e5f0678051 100644
--- a/tools/spanner/purge_ttl.py
+++ b/tools/spanner/purge_ttl.py
@@ -63,10 +63,7 @@ def deleter(
             )
         end = datetime.now()
         logging.info(
-            "{name}: removed {result} rows, {name}_duration: {time}, prefix: {prefix}".format(
-                name=name, result=result, time=end - start, prefix=prefix
-            )
-        )
+            f"{name}: removed {result} rows, {name}_duration: {end - start}, prefix: {prefix}")
 
 
 def add_conditions(args, query: str, prefix: Optional[str]):
diff --git a/tools/tokenserver/purge_old_records.py b/tools/tokenserver/purge_old_records.py
index ca020a5848..4be7dc116b 100644
--- a/tools/tokenserver/purge_old_records.py
+++ b/tools/tokenserver/purge_old_records.py
@@ -85,9 +85,7 @@ def purge_old_records(
             previous_list = rows
             range_msg = ""
             if uid_range:
-                range_msg = (
-                    f" within range {uid_range[0] or 'Start'}" f" to {uid_range[1] or 'End'}"
-                )
+                range_msg = f" within range {uid_range[0] or 'Start'} to {uid_range[1] or 'End'}"
             logger.info(f"Fetched {len(rows)} rows at offset {offset}{range_msg}")
             counter = 0
             for row in rows:
diff --git a/tools/user_migration/gen_bso_users.py b/tools/user_migration/gen_bso_users.py
index 9bedaf13dd..4259f19ef3 100644
--- a/tools/user_migration/gen_bso_users.py
+++ b/tools/user_migration/gen_bso_users.py
@@ -107,8 +107,8 @@ def run(self, bso_num):
         try:
             cursor = connection.cursor()
             sql = (
-                """select userid, count(*) as count from bso{}"""
-                """ group by userid order by userid""".format(bso_num)
+                f"""select userid, count(*) as count from bso{bso_num}"""
+                """ group by userid order by userid"""
             )
             if self.args.user_range:
                 (offset, limit) = self.args.user_range.split(":")
diff --git a/tools/user_migration/old/migrate_user.py b/tools/user_migration/old/migrate_user.py
index 119a647a36..1e32b43685 100644
--- a/tools/user_migration/old/migrate_user.py
+++ b/tools/user_migration/old/migrate_user.py
@@ -384,7 +384,7 @@ def spanner_transact(transaction):
                     mod_v,
                 )
             ]
-            logging.debug("### uc: {}".format(uc_columns, uc_values))
+            logging.debug(f"### uc: {uc_columns} {uc_values}")
             transaction.insert("user_collections", columns=uc_columns, values=uc_values)
         # add the BSO values.
         if args.full and collection_id == META_GLOBAL_COLLECTION_ID: