diff --git a/teeth_agent/standby.py b/teeth_agent/standby.py
index 26020aa10..ef748d296 100644
--- a/teeth_agent/standby.py
+++ b/teeth_agent/standby.py
@@ -89,7 +89,7 @@ def _verify_image(image_info, image_location):
         algo = getattr(hashlib, k, None)
         if algo is None:
             continue
-        hash_ = algo(open(image_location).read())
+        hash_ = algo(open(image_location).read()).hexdigest()
         if hash_ == v:
             return True
     return False
diff --git a/teeth_agent/tests/standby_agent.py b/teeth_agent/tests/standby_agent.py
index 169e7e377..cf51fc7b2 100644
--- a/teeth_agent/tests/standby_agent.py
+++ b/teeth_agent/tests/standby_agent.py
@@ -166,7 +166,8 @@ class TestBaseTeethAgent(unittest.TestCase):
         open_mock.return_value.__exit__ = mock.Mock()
         read_mock = open_mock.return_value.read
         read_mock.return_value = 'content'
-        md5_mock.return_value = image_info['hashes'].values()[0]
+        hexdigest_mock = md5_mock.return_value.hexdigest
+        hexdigest_mock.return_value = image_info['hashes'].values()[0]
 
         standby._download_image(image_info)
         requests_mock.assert_called_once_with(image_info['urls'][0],
@@ -204,8 +205,10 @@ class TestBaseTeethAgent(unittest.TestCase):
     def test_verify_image_success(self, md5_mock, sha1_mock, open_mock):
         image_info = self._build_fake_image_info()
         image_info['hashes']['sha1'] = image_info['hashes']['md5']
-        md5_mock.return_value = image_info['hashes']['md5']
-        sha1_mock.return_value = image_info['hashes']['sha1']
+        hexdigest_mock = md5_mock.return_value.hexdigest
+        hexdigest_mock.return_value = image_info['hashes']['md5']
+        hexdigest_mock = sha1_mock.return_value.hexdigest
+        hexdigest_mock.return_value = image_info['hashes']['sha1']
         image_location = '/foo/bar'
 
         verified = standby._verify_image(image_info, image_location)
@@ -217,7 +220,7 @@ class TestBaseTeethAgent(unittest.TestCase):
     @mock.patch('hashlib.md5', autospec=True)
     def test_verify_image_failure(self, md5_mock, open_mock):
         image_info = self._build_fake_image_info()
-        md5_mock.return_value = 'wrong hash'
+        md5_mock.return_value.hexdigest.return_value = 'wrong hash'
         image_location = '/foo/bar'
 
         verified = standby._verify_image(image_info, image_location)