diff --git a/.gitignore b/.gitignore
index 723dc68..66c9dec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@ __pycache__
 /.eggs
 .venv
 venv
+.coverage
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 95e3fc7..e148601 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -305,6 +305,9 @@ class CommandLineTestCase(unittest.TestCase):
         config = os.path.join(dir, 'config')
 
         self.addCleanup(os.environ.update, HOME=os.environ['HOME'])
+        # remove other env vars to make sure we are using the HOME config file.
+        os.environ.pop('YAMLLINT_CONFIG_FILE', None)
+        os.environ.pop('XDG_CONFIG_HOME', None)
         os.environ['HOME'] = home
 
         with open(config, 'w') as f: