diff --git a/.codeclimate.yml b/.codeclimate.yml
index a5d507675ef..8e9c8cac813 100644
--- a/.codeclimate.yml
+++ b/.codeclimate.yml
@@ -1,5 +1,5 @@
 ---
-version: "2"         # required to adjust maintainability checks
+version: "2"  # required to adjust maintainability checks
 
 checks:
   import-error:
@@ -8,12 +8,9 @@ checks:
     enabled: false
   no-name-in-module:
     enabled: false
-  # Per-Language Mass Threshold Defaults
-  # https://docs.codeclimate.com/docs/duplication#section-understand-the-engine
   similar-code:
     config:
-      threshold: 68 #overriding will affect all languages
+      threshold: 68
   identical-code:
     config:
-      threshold: 32 #overriding will affect all languages
-# ... CONFIG CONTENT ...
\ No newline at end of file
+      threshold: 32
diff --git a/.yamllint.yaml b/.yamllint.yaml
index 84789e6067c..e9d3a5d49a5 100644
--- a/.yamllint.yaml
+++ b/.yamllint.yaml
@@ -15,13 +15,9 @@ rules:
   brackets: enable
   colons: enable
   commas: enable
-  comments:
-    level: warning
-  comments-indentation:
-    level: warning
-  document-end: disable
-  document-start:
-    level: warning
+  comments: disable
+  comments-indentation: disable
+  document-start: disable
   empty-lines: enable
   empty-values: disable
   float-values: disable
diff --git a/kyu_6/a_rule_of_divisibility_by_13/test_thirt.py b/kyu_6/a_rule_of_divisibility_by_13/test_thirt.py
index 89444fb387d..9449e02832d 100644
--- a/kyu_6/a_rule_of_divisibility_by_13/test_thirt.py
+++ b/kyu_6/a_rule_of_divisibility_by_13/test_thirt.py
@@ -1,5 +1,6 @@
 """
-Test for -> A Rule of Divisibility by 13
+Test for -> A Rule of Divisibility by 13.
+
 Created by Egor Kostan.
 GitHub: https://github.com/ikostan
 """
@@ -8,6 +9,7 @@
 
 import unittest
 import allure
+from parameterized import parameterized
 from kyu_6.a_rule_of_divisibility_by_13.thirt import thirt
 from utils.log_func import print_log
 
@@ -23,14 +25,21 @@
     url='https://www.codewars.com/kata/564057bc348c7200bd0000ff',
     name='Source/Kata')
 class ThirtTestCase(unittest.TestCase):
-    """
-    Testing 'thirt' function
-    """
+    """Testing 'thirt' function."""
 
+    @parameterized.expand([
+        (1234567, 87),
+        (321, 48),
+        (8529, 79),
+        (85299258, 31),
+        (5634, 57),
+        (1111111111, 71),
+        (987654321, 30)])
     # pylint: disable-msg=R0801
-    def test_thirt(self):
+    def test_thirt(self, n, expected):
         """
-        Testing 'thirt' function with various test data
+        Testing 'thirt' function with various test data.
+
         :return:
         """
         allure.dynamic.title("Testing 'thirt' function")
@@ -44,26 +53,12 @@ def test_thirt(self):
             "on an integer n (>=0). 'thirt' should return the stationary"
             " number.</p>")
         # pylint: enable-msg=R0801
-        test_data: tuple = (
-            (1234567, 87),
-            (321, 48),
-            (8529, 79),
-            (85299258, 31),
-            (5634, 57),
-            (1111111111, 71),
-            (987654321, 30))
-
-        for n, expected in test_data:
-            actual_result = thirt(n)
-            # pylint: disable-msg=R0801
-            with allure.step(f"Enter a n ({n}) and verify the "
-                             f"expected output ({expected}) vs "
-                             f"actual result ({actual_result})"):
-
-                print_log(n=n,
-                          expected=expected,
-                          result=actual_result)
 
-                self.assertEqual(expected,
-                                 actual_result)
+        actual_result = thirt(n)
+        # pylint: disable-msg=R0801
+        with allure.step(f"Enter a n ({n}) and verify the "
+                         f"expected output ({expected}) vs "
+                         f"actual result ({actual_result})"):
+            print_log(n=n, expected=expected, result=actual_result)
+            self.assertEqual(expected, actual_result)
             # pylint: enable-msg=R0801