diff --git a/django_migration_linter/migration_linter.py b/django_migration_linter/migration_linter.py
index e00b6a0..999843f 100644
--- a/django_migration_linter/migration_linter.py
+++ b/django_migration_linter/migration_linter.py
@@ -134,12 +134,6 @@ class MigrationLinter(object):
     def lint_all_migrations(self, git_commit_id=None):
         # Collect migrations
         if git_commit_id:
-            if not utils.is_git_project(self.django_path):
-                raise ValueError(
-                    (
-                        "The given project {0} does not seem " "to be versioned by git."
-                    ).format(self.django_path)
-                )
             migrations = self._gather_migrations_git(git_commit_id)
         else:
             migrations = self._gather_all_migrations()
@@ -178,7 +172,7 @@ class MigrationLinter(object):
         it allows to seperate the instances correctly.
         """
         sqlmigrate_command = (
-            "cd {0} && " "{1} manage.py sqlmigrate {2} {3} " "--database {4}"
+            "cd {0} && {1} manage.py sqlmigrate {2} {3} " "--database {4}"
         ).format(
             self.django_path, self.python_exe, app_name, migration_name, self.database
         )
@@ -205,7 +199,7 @@ class MigrationLinter(object):
         migrations = []
         # Get changes since specified commit
         git_diff_command = (
-            "cd {0} && " "git diff --name-only --diff-filter=A {1}"
+            "cd {0} && git diff --name-only --diff-filter=A {1}"
         ).format(self.django_path, git_commit_id)
         logger.info("Executing {0}".format(git_diff_command))
         diff_process = Popen(git_diff_command, shell=True, stdout=PIPE, stderr=PIPE)
diff --git a/django_migration_linter/utils.py b/django_migration_linter/utils.py
index 1efc5d7..5d34d1b 100644
--- a/django_migration_linter/utils.py
+++ b/django_migration_linter/utils.py
@@ -25,11 +25,6 @@ def is_django_project(path):
     return os.path.isfile(django_manage_file)
 
 
-def is_git_project(path):
-    git_directory = os.path.join(path, ".git")
-    return os.path.isdir(git_directory)
-
-
 def is_directory(path):
     return os.path.isdir(path)
 
diff --git a/tests/unit/test_utils.py b/tests/unit/test_utils.py
index 28fb363..b997288 100644
--- a/tests/unit/test_utils.py
+++ b/tests/unit/test_utils.py
@@ -16,25 +16,11 @@ import os
 import unittest
 
 from tests import fixtures
-from django_migration_linter.utils import is_django_project, is_git_project, is_directory, find_project_settings_module, \
+from django_migration_linter.utils import is_django_project, is_directory, find_project_settings_module, \
     split_path, split_migration_path
 
 
 class UtilityFunctionTest(unittest.TestCase):
-    def tearDown(self, *args, **kwargs):
-        fixtures.clear_all_git_projects()
-        super(
-            UtilityFunctionTest,
-            self).tearDown(*args, **kwargs)
-
-    def test_detect_not_git_project(self):
-        self.assertFalse(is_git_project(fixtures.NOT_GIT_DJANGO_PROJECT))
-
-    def test_detect_git_project(self):
-        project_path = fixtures.MULTI_COMMIT_PROJECT
-        fixtures.prepare_git_project(project_path)
-        self.assertTrue(is_git_project(project_path))
-
     def test_detect_django_project(self):
         self.assertTrue(is_django_project(fixtures.ADD_NOT_NULL_COLUMN_PROJECT))