diff --git a/test/test_update_data_base.py b/test/test_update_data_base.py
index 3fdc344..be1e015 100644
--- a/test/test_update_data_base.py
+++ b/test/test_update_data_base.py
@@ -11,18 +11,29 @@
 
 
 class TestUpdate(unittest.TestCase):
-    
     def setUp(self):
 
         conn = sqlite3.connect("meter_db.sqlite")
         cur = conn.cursor()
         cur.execute('DROP TABLE IF EXISTS meter_table')
-        cur.execute('CREATE TABLE meter_table (meter_id TEXT, energy INTEGER,date TEXT, status BOOLEAN)')
-        cur.execute('INSERT INTO meter_table (meter_id, energy,date, status) VALUES (?, ?, ?, ? )', ("00fe00", 0, "2021-06-26 18:41:23.580757", True))
-        cur.execute('INSERT INTO meter_table (meter_id, energy,date, status) VALUES (?, ?, ?, ? )', ("00ff01", 0, "2021-06-26 18:41:23.580757", True))
-        cur.execute('INSERT INTO meter_table (meter_id, energy,date, status) VALUES (?, ?, ?, ? )', ("00ff02", 0, "2021-06-26 18:41:23.580757", True))
-        cur.execute('INSERT INTO meter_table (meter_id, energy,date, status) VALUES (?, ?, ?, ? )', ("00ff03", 0, "2021-06-26 18:41:23.580757", True))
-        cur.execute('INSERT INTO meter_table (meter_id, energy,date, status) VALUES (?, ?, ?, ? )', ("00ff04", 0, "2021-06-26 18:41:23.580757", True))
+        cur.execute(
+            'CREATE TABLE meter_table (meter_id TEXT, energy INTEGER,date TEXT, status BOOLEAN)'
+        )
+        cur.execute(
+            'INSERT INTO meter_table (meter_id, energy,date, status) VALUES (?, ?, ?, ? )',
+            ("00fe00", 0, "2021-06-26 18:41:23.580757", True))
+        cur.execute(
+            'INSERT INTO meter_table (meter_id, energy,date, status) VALUES (?, ?, ?, ? )',
+            ("00ff01", 0, "2021-06-26 18:41:23.580757", True))
+        cur.execute(
+            'INSERT INTO meter_table (meter_id, energy,date, status) VALUES (?, ?, ?, ? )',
+            ("00ff02", 0, "2021-06-26 18:41:23.580757", True))
+        cur.execute(
+            'INSERT INTO meter_table (meter_id, energy,date, status) VALUES (?, ?, ?, ? )',
+            ("00ff03", 0, "2021-06-26 18:41:23.580757", True))
+        cur.execute(
+            'INSERT INTO meter_table (meter_id, energy,date, status) VALUES (?, ?, ?, ? )',
+            ("00ff04", 0, "2021-06-26 18:41:23.580757", True))
         conn.commit()
         cur.close()
 
@@ -32,7 +43,8 @@ def testUpdateExistingMeter(self):
         update_date_base("00fe00", expected_data)
         conn = sqlite3.connect("meter_db.sqlite")
         cur = conn.cursor()
-        cur.execute('SELECT * FROM meter_table WHERE meter_id = ?', ("00fe00",))
+        cur.execute('SELECT * FROM meter_table WHERE meter_id = ?',
+                    ("00fe00", ))
         actual_data = cur.fetchone()[1]
         self.assertEqual(actual_data, expected_data, "Should be equal")
         cur.close()
@@ -43,8 +55,9 @@ def testUpdateNonExistingMeter(self):
         update_date_base("00ff00", expected_data)
         conn = sqlite3.connect("meter_db.sqlite")
         cur = conn.cursor()
-        cur.execute('SELECT * FROM meter_table WHERE meter_id = ?', ("00ff00",))
-        actual_data = cur.fetchone()      
+        cur.execute('SELECT * FROM meter_table WHERE meter_id = ?',
+                    ("00ff00", ))
+        actual_data = cur.fetchone()
         self.assertIsNone(actual_data, "Should be None")
         cur.close()