diff --git a/lintly/cli.py b/lintly/cli.py
index c47716b..e50ced2 100644
--- a/lintly/cli.py
+++ b/lintly/cli.py
@@ -62,6 +62,9 @@
 @click.option('--comment-tag',
               default='',
               help='A tag used to identify comments from a previous run that should be deleted')
+@click.option('--base-dir',
+              default='.',
+              help='The base git directory')
 @click.option('--exit-zero/--no-exit-zero', default=False,
               help=('Whether Lintly should exit with error code indicating '
                     'amount of violations or not. Default false'))
diff --git a/lintly/config.py b/lintly/config.py
index daf77c9..174646c 100644
--- a/lintly/config.py
+++ b/lintly/config.py
@@ -8,11 +8,13 @@ class Config(object):
     """A Config object that knows how to return configuration from the CLI or Continuous Integration services"""
 
     LINTLY_IDENTIFIER = '<!-- Automatically posted by Lintly -->'
+    BASE_DIR = '.'
 
     def __init__(self, cli_config):
         self.cli_config = cli_config
         if self.comment_tag:
             type(self).LINTLY_IDENTIFIER = '(%s)%s' % (self.comment_tag, type(self).LINTLY_IDENTIFIER)
+        type(self).BASE_DIR = self.base_dir
 
     def as_dict(self):
         return {
@@ -27,6 +29,7 @@ def as_dict(self):
             'github_check_run_id': self.github_check_run_id,
             'review_body': self.review_body,
             'comment_tag': self.comment_tag,
+            'base_dir': self.base_dir,
         }
 
     @property
@@ -73,6 +76,10 @@ def review_body(self):
     def comment_tag(self):
         return self.cli_config['comment_tag']
 
+    @property
+    def base_dir(self):
+        return self.cli_config['base_dir']
+
     @property
     def github_check_run_id(self):
         """The Check Run ID from GitHub Actions.
diff --git a/lintly/parsers.py b/lintly/parsers.py
index e474b1e..3ba3269 100644
--- a/lintly/parsers.py
+++ b/lintly/parsers.py
@@ -8,6 +8,7 @@
 import re
 
 from .violations import Violation
+from .config import Config
 
 
 class BaseLintParser(object):
@@ -15,15 +16,12 @@ class BaseLintParser(object):
     def parse_violations(self, output):
         raise NotImplementedError
 
-    def _get_working_dir(self):
-        return os.getcwd()
-
     def _normalize_path(self, path):
         """
         Normalizes a file path so that it returns a path relative to the root repo directory.
         """
         norm_path = os.path.normpath(path)
-        rel_path = os.path.relpath(norm_path, start=self._get_working_dir())
+        rel_path = os.path.relpath(norm_path, start=Config.BASE_DIR)
         if os.name == 'nt':
             rel_path = rel_path.replace('\\', '/')
         return rel_path
diff --git a/tests/test_parsers.py b/tests/test_parsers.py
index 3e7a479..0a54400 100644
--- a/tests/test_parsers.py
+++ b/tests/test_parsers.py
@@ -2,12 +2,8 @@
 import os
 import unittest
 
-try:
-    from unittest.mock import patch
-except ImportError:
-    from mock import patch
-
 from lintly.parsers import PARSERS
+from lintly.config import Config
 
 
 class ParserTestCaseMixin(object):
@@ -137,8 +133,8 @@ class ESLintParserTestCase(ParserTestCaseMixin, unittest.TestCase):
         ]
     }
 
-    @patch('lintly.parsers.ESLintParser._get_working_dir', return_value='/Users/grant/project')
-    def test_parse_violations(self, _get_working_dir_mock):
+    def test_parse_violations(self):
+        Config.BASE_DIR = '/Users/grant/project'
         super(ESLintParserTestCase, self).test_parse_violations()
 
 
@@ -168,8 +164,8 @@ class BlackParserTestCase(ParserTestCaseMixin, unittest.TestCase):
         for file_path in ['lintly/violations.py', 'lintly/parsers.py']
     }
 
-    @patch('lintly.parsers.BlackParser._get_working_dir', return_value='/Users/jouyuy/Dev/workspace/Lintly')
-    def test_parse_violations(self, _get_working_dir_mock):
+    def test_parse_violations(self):
+        Config.BASE_DIR = '/Users/jouyuy/Dev/workspace/Lintly'
         super(BlackParserTestCase, self).test_parse_violations()