diff --git a/tests/test_utilities.py b/tests/test_utilities.py
index c97f3751..872be921 100644
--- a/tests/test_utilities.py
+++ b/tests/test_utilities.py
@@ -7,7 +7,10 @@ from slpkg.load_data import LoadData
 
 class TestUtilities(unittest.TestCase):
 
-    def setUp(self):
+    """ Test for utilities.
+    """
+
+    def setUp(self) -> None:
         self.utils = Utilities()
         self.repository: str = 'slack'
         load = LoadData()
@@ -15,35 +18,56 @@ class TestUtilities(unittest.TestCase):
         self.build_path = Configs.build_path
         self.package = 'aaa_base-15.0-x86_64-4_slack15.0'
 
-    def test_ins_installed(self):
+    def test_ins_installed(self) -> None:
+        """ Test fro installed.
+        """
         self.assertEqual(self.package, self.utils.is_package_installed('aaa_base'))
 
-    def test_split_name(self):
+    def test_split_name(self) -> None:
+        """ Test for name split.
+        """
         self.assertEqual('aaa_base', self.utils.split_package(self.package)['name'])
 
-    def test_split_version(self):
+    def test_split_version(self) -> None:
+        """ Test for version split.
+        """
         self.assertEqual('15.0', self.utils.split_package(self.package)['version'])
 
-    def test_split_arch(self):
+    def test_split_arch(self) -> None:
+        """ Test for arch split.
+        """
         self.assertEqual('x86_64', self.utils.split_package(self.package)['arch'])
 
-    def test_split_build(self):
+    def test_split_build(self) -> None:
+        """ Test for build split.
+        """
         self.assertEqual('4', self.utils.split_package(self.package)['build'])
 
-    def test_is_installed(self):
+    def test_is_installed(self) -> None:
+        """ Test for is installed.
+        """
         self.assertEqual(self.package, self.utils.is_package_installed('aaa_base'))
 
-    def test_all_installed(self):
+    def test_all_installed(self) -> None:
+        """ Test for all installed.
+        """
         self.assertIn(self.package, self.utils.all_installed().values())
 
-    def test_is_option(self):
-        self.assertTrue(True, self.utils.is_option(('-P', '--parallel'),
-                                                   ['-k', '-p', '-P', '--parallel', '--repository']))
+    def test_is_option(self) -> None:
+        """ Test for is option.
+        """
+        is_parallel: bool = True
+        self.assertTrue(is_parallel, self.utils.is_option(('-P', '--parallel'),
+                                                          ['-k', '-p', '-P', '--parallel', '--repository']))
 
-    def test_get_file_size(self):
+    def test_get_file_size(self) -> None:
+        """ Test for file size.
+        """
         self.assertEqual(1249, self.utils.count_file_size('aaa_base'))
 
-    def test_apply_package_pattern(self):
+    def test_apply_package_pattern(self) -> None:
+        """ Test for apply pattern.
+        """
         self.assertGreater(len(self.utils.apply_package_pattern(self.data, ['*'])), 1)