diff --git a/restructuredtext_lint/test/test.py b/restructuredtext_lint/test/test.py
index 8e2417f..e6a3b45 100644
--- a/restructuredtext_lint/test/test.py
+++ b/restructuredtext_lint/test/test.py
@@ -11,11 +11,11 @@ import yaml
 import restructuredtext_lint
 
 
-__dir__ = os.path.dirname(os.path.abspath(__file__))
-valid_rst = os.path.join(__dir__, 'test_files', 'valid.rst')
-warning_rst = os.path.join(__dir__, 'test_files', 'second_short_heading.rst')
-invalid_rst = os.path.join(__dir__, 'test_files', 'invalid.rst')
-rst_lint_path = os.path.join(__dir__, os.pardir, 'cli.py')
+_dir = os.path.dirname(os.path.abspath(__file__))
+valid_rst = os.path.join(_dir, 'test_files', 'valid.rst')
+warning_rst = os.path.join(_dir, 'test_files', 'second_short_heading.rst')
+invalid_rst = os.path.join(_dir, 'test_files', 'invalid.rst')
+rst_lint_path = os.path.join(_dir, os.pardir, 'cli.py')
 
 """
 # TODO: Implement this as a class (options) with a sugar function that lints a string against a set of options
@@ -50,7 +50,7 @@ class TestRestructuredtextLint(TestCase):
         actual_errors = self._lint_file(content, invalid_rst)
 
         # Load in expected errors
-        expected_yaml = self._load_file(os.path.join(__dir__, 'test_files', 'invalid.yaml'))
+        expected_yaml = self._load_file(os.path.join(_dir, 'test_files', 'invalid.yaml'))
         expected_errors = yaml.load(expected_yaml)
 
         # Assert errors against expected errors
@@ -64,7 +64,7 @@ class TestRestructuredtextLint(TestCase):
 
     def test_encoding_utf8(self):
         """A document with utf-8 characters is valid."""
-        filepath = os.path.join(__dir__, 'test_files', 'utf8.rst')
+        filepath = os.path.join(_dir, 'test_files', 'utf8.rst')
         errors = restructuredtext_lint.lint_file(filepath, encoding='utf-8')
         self.assertEqual(errors, [])
 
@@ -73,7 +73,7 @@ class TestRestructuredtextLint(TestCase):
 
         This is a regression test for https://github.com/twolfson/restructuredtext-lint/issues/5
         """
-        filepath = os.path.join(__dir__, 'test_files', 'second_short_heading.rst')
+        filepath = os.path.join(_dir, 'test_files', 'second_short_heading.rst')
         errors = restructuredtext_lint.lint_file(filepath)
         self.assertEqual(errors[0].line, 6)
         self.assertEqual(errors[0].source, filepath)
@@ -83,7 +83,7 @@ class TestRestructuredtextLint(TestCase):
 
         This is a regression test for https://github.com/twolfson/restructuredtext-lint/issues/6
         """
-        filepath = os.path.join(__dir__, 'test_files', 'invalid_target.rst')
+        filepath = os.path.join(_dir, 'test_files', 'invalid_target.rst')
         errors = restructuredtext_lint.lint_file(filepath)
         self.assertIn('Unknown target name', errors[0].message)
 
@@ -92,7 +92,7 @@ class TestRestructuredtextLint(TestCase):
 
         This is a regression test for https://github.com/twolfson/restructuredtext-lint/issues/7
         """
-        filepath = os.path.join(__dir__, 'test_files', 'invalid_line_mismatch.rst')
+        filepath = os.path.join(_dir, 'test_files', 'invalid_line_mismatch.rst')
         errors = restructuredtext_lint.lint_file(filepath)
         self.assertIn('Title overline & underline mismatch', errors[0].message)
 
@@ -101,7 +101,7 @@ class TestRestructuredtextLint(TestCase):
 
         This is a regression test for https://github.com/twolfson/restructuredtext-lint/issues/12
         """
-        filepath = os.path.join(__dir__, 'test_files', 'invalid_link.rst')
+        filepath = os.path.join(_dir, 'test_files', 'invalid_link.rst')
         errors = restructuredtext_lint.lint_file(filepath)
         self.assertIn('Anonymous hyperlink mismatch: 1 references but 0 targets.', errors[0].message)
         self.assertIn('Hyperlink target "hello" is not referenced.', errors[1].message)