diff --git a/skipper/git.py b/skipper/git.py
index 5098114..2766db7 100644
--- a/skipper/git.py
+++ b/skipper/git.py
@@ -1,10 +1,10 @@
-import os.path
 import logging
+import os
 import subprocess
 
 
 def get_hash(short=False):
-    if not os.path.exists('.git'):
+    if not is_git_repository():
         logging.warning('*** Not working in a git repository ***')
         return 'none'
 
@@ -22,3 +22,10 @@ def get_hash(short=False):
 def uncommitted_changes():
     """Return True is there are uncommitted changes."""
     return subprocess.call(['git', 'diff', '--quiet', 'HEAD']) != 0
+
+
+def is_git_repository():
+    if os.path.exists('.git'):
+        return True
+    command = ['git', 'rev-parse', '--is-inside-work-tree']
+    return subprocess.call(command, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL) == 0
diff --git a/tests/test_git.py b/tests/test_git.py
index 2eed711..1f3a40a 100644
--- a/tests/test_git.py
+++ b/tests/test_git.py
@@ -1,3 +1,4 @@
+import subprocess
 import unittest
 import mock
 from skipper import git
@@ -9,33 +10,49 @@
 
 class TestGit(unittest.TestCase):
     @mock.patch('subprocess.check_output', return_value=GIT_HASH_FULL)
-    @mock.patch('os.path.exists', return_value=True)
-    def test_get_hash_with_default_argument(self, exists_mock, check_output_mock):
+    @mock.patch('skipper.git.is_git_repository', return_value=True)
+    def test_get_hash_with_default_argument(self, is_git_repository_mock, check_output_mock):
         git_hash = git.get_hash()
-        exists_mock.assert_called_once_with('.git')
+        is_git_repository_mock.assert_called_once()
         check_output_mock.assert_called_once_with(['git', 'rev-parse', 'HEAD'])
         self.assertEqual(git_hash, GIT_HASH_FULL.decode('utf-8'))
 
     @mock.patch('subprocess.check_output', return_value=GIT_HASH_FULL)
-    @mock.patch('os.path.exists', return_value=True)
-    def test_get_full_hash(self, exists_mock, check_output_mock):
+    @mock.patch('skipper.git.is_git_repository', return_value=True)
+    def test_get_full_hash(self, is_git_repository_mock, check_output_mock):
         git_hash = git.get_hash(short=False)
-        exists_mock.assert_called_once_with('.git')
+        is_git_repository_mock.assert_called_once()
         check_output_mock.assert_called_once_with(['git', 'rev-parse', 'HEAD'])
         self.assertEqual(git_hash, GIT_HASH_FULL.decode('utf-8'))
 
     @mock.patch('subprocess.check_output', return_value=GIT_HASH_SHORT)
-    @mock.patch('os.path.exists', return_value=True)
-    def test_get_short_hash(self, exists_mock, check_output_mock):
+    @mock.patch('skipper.git.is_git_repository', return_value=True)
+    def test_get_short_hash(self, is_git_repository_mock, check_output_mock):
         git_hash = git.get_hash(short=True)
-        exists_mock.assert_called_once_with('.git')
+        is_git_repository_mock.assert_called_once()
         check_output_mock.assert_called_once_with(['git', 'rev-parse', '--short', 'HEAD'])
         self.assertEqual(git_hash, GIT_HASH_SHORT.decode('utf-8'))
 
-    @mock.patch('subprocess.check_output')
+    @mock.patch('skipper.git.is_git_repository', return_value=False)
+    def test_not_in_git_project(self, is_git_repository_mock):
+        self.assertEqual(git.get_hash(), 'none')
+        is_git_repository_mock.assert_called_once()
+
+    @mock.patch('os.path.exists', return_value=True)
+    def test_should_be_in_git_project_os_path(self, exists_mock):
+        self.assertTrue(git.is_git_repository())
+        exists_mock.assert_called_once_with('.git')
+
+    @mock.patch('subprocess.call', return_value=0)
     @mock.patch('os.path.exists', return_value=False)
-    def test_not_in_git_project(self, exists_mock, check_output_mock):
-        git_hash = git.get_hash()
+    def test_should_be_in_git_project_git(self, exists_mock, call_mock):
+        self.assertTrue(git.is_git_repository())
+        exists_mock.assert_called_once_with('.git')
+        call_mock.assert_called_once_with(['git', 'rev-parse', '--is-inside-work-tree'], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+
+    @mock.patch('subprocess.call', return_value=1)
+    @mock.patch('os.path.exists', return_value=False)
+    def test_should_not_be_in_git_project(self, exists_mock, call_mock):
+        self.assertFalse(git.is_git_repository())
         exists_mock.assert_called_once_with('.git')
-        check_output_mock.assert_not_called()
-        self.assertEqual(git_hash, 'none')
+        call_mock.assert_called_once_with(['git', 'rev-parse', '--is-inside-work-tree'], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)