diff --git a/life.py b/life.py
index f752d36..0a695a5 100644
--- a/life.py
+++ b/life.py
@@ -4,6 +4,7 @@
 from fixed_consume import FixedConsume
 import argparse
 import sys
+
 from output_collector import OutputCollector
 
 
@@ -51,9 +52,9 @@ def main(config_path):
     sys.stdout = sys.__stdout__
     print(output_collector.get_contents())
 
+
 if __name__ == '__main__':
     parser = argparse.ArgumentParser(description="Run life.py with a specified config file.")
     parser.add_argument('config_path', type=str, help="Path to the configuration file.")
     args = parser.parse_args()
     main(args.config_path)
-
diff --git a/tests/config_jp.json b/tests/config_ja.json
similarity index 97%
rename from tests/config_jp.json
rename to tests/config_ja.json
index 49571e4..ebfc67f 100644
--- a/tests/config_jp.json
+++ b/tests/config_ja.json
@@ -1,5 +1,5 @@
 {
-    "language": "jp",
+    "language": "ja",
     "currency": "JPY",
     "mark": "¥",
     "bank_rate": 1.2,