diff --git a/docker/test/style/process_style_check_result.py b/docker/test/style/process_style_check_result.py
index fd544f3e9c1..8c2110d64e5 100755
--- a/docker/test/style/process_style_check_result.py
+++ b/docker/test/style/process_style_check_result.py
@@ -40,10 +40,10 @@ def process_result(result_folder):
 
 
 def write_results(results_file, status_file, results, status):
-    with open(results_file, "w") as f:
+    with open(results_file, "w", encoding="utf-8") as f:
         out = csv.writer(f, delimiter="\t")
         out.writerows(results)
-    with open(status_file, "w") as f:
+    with open(status_file, "w", encoding="utf-8") as f:
         out = csv.writer(f, delimiter="\t")
         out.writerow(status)
 
@@ -53,9 +53,10 @@ if __name__ == "__main__":
     parser = argparse.ArgumentParser(
         description="ClickHouse script for parsing results of style check"
     )
-    parser.add_argument("--in-results-dir", default="/test_output/")
-    parser.add_argument("--out-results-file", default="/test_output/test_results.tsv")
-    parser.add_argument("--out-status-file", default="/test_output/check_status.tsv")
+    default_dir = "/test_output"
+    parser.add_argument("--in-results-dir", default=default_dir)
+    parser.add_argument("--out-results-file", default=f"{default_dir}/test_results.tsv")
+    parser.add_argument("--out-status-file", default=f"{default_dir}/check_status.tsv")
     args = parser.parse_args()
 
     state, description, test_results = process_result(args.in_results_dir)
diff --git a/tests/ci/style_check.py b/tests/ci/style_check.py
index ce638c7fac5..f06646d83c0 100644
--- a/tests/ci/style_check.py
+++ b/tests/ci/style_check.py
@@ -1,32 +1,26 @@
 #!/usr/bin/env python3
-import logging
-import subprocess
-import os
 import csv
+import logging
+import os
+import subprocess
 import sys
 
-from github import Github
 
-from env_helper import (
-    RUNNER_TEMP,
-    GITHUB_WORKSPACE,
-)
-from s3_helper import S3Helper
-from pr_info import PRInfo
-from get_robot_token import get_best_robot_token
-from upload_result_helper import upload_results
-from docker_pull_helper import get_image_with_version
-from commit_status_helper import (
-    post_commit_status,
-    fail_simple_check,
-)
 from clickhouse_helper import (
     ClickHouseHelper,
     mark_flaky_tests,
     prepare_tests_results_for_clickhouse,
 )
-from stopwatch import Stopwatch
+from commit_status_helper import fail_simple_check, post_commit_status
+from docker_pull_helper import get_image_with_version
+from env_helper import GITHUB_WORKSPACE, RUNNER_TEMP
+from get_robot_token import get_best_robot_token
+from github_helper import GitHub
+from pr_info import PRInfo
 from rerun_helper import RerunHelper
+from s3_helper import S3Helper
+from stopwatch import Stopwatch
+from upload_result_helper import upload_results
 
 NAME = "Style Check (actions)"
 
@@ -58,7 +52,8 @@ def process_result(result_folder):
 
     try:
         results_path = os.path.join(result_folder, "test_results.tsv")
-        test_results = list(csv.reader(open(results_path, "r"), delimiter="\t"))
+        with open(results_path, "r", encoding="utf-8") as fd:
+            test_results = list(csv.reader(fd, delimiter="\t"))
         if len(test_results) == 0:
             raise Exception("Empty results")
 
@@ -79,7 +74,7 @@ if __name__ == "__main__":
 
     pr_info = PRInfo()
 
-    gh = Github(get_best_robot_token())
+    gh = GitHub(get_best_robot_token())
 
     rerun_helper = RerunHelper(gh, pr_info, NAME)
     if rerun_helper.is_already_finished_by_status():
@@ -111,7 +106,7 @@ if __name__ == "__main__":
     report_url = upload_results(
         s3_helper, pr_info.number, pr_info.sha, test_results, additional_files, NAME
     )
-    print("::notice ::Report url: {}".format(report_url))
+    print(f"::notice ::Report url: {report_url}")
     post_commit_status(gh, pr_info.sha, NAME, description, state, report_url)
 
     prepared_events = prepare_tests_results_for_clickhouse(