diff --git a/swh/loader/dir/tests/test_git_utils.py b/swh/loader/dir/tests/test_git_utils.py
index 0606891..57c9b7a 100644
--- a/swh/loader/dir/tests/test_git_utils.py
+++ b/swh/loader/dir/tests/test_git_utils.py
@@ -1,70 +1,94 @@
 # Copyright (C) 2015  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import unittest
 
 from nose.tools import istest
 
 from swh.loader.dir.git import utils
 
 
 class GitHashlib(unittest.TestCase):
 
     def setUp(self):
         self.blob_data = b'42\n'
 
         self.tree_data = b''.join([b'40000 barfoo\0',
-                                   bytes.fromhex('c3020f6bf135a38c6df3afeb5fb38232c5e07087'),
+                                   bytes.fromhex('c3020f6bf135a38c6df'
+                                                 '3afeb5fb38232c5e07087'),
                                    b'100644 blah\0',
-                                   bytes.fromhex('63756ef0df5e4f10b6efa33cfe5c758749615f20'),
+                                   bytes.fromhex('63756ef0df5e4f10b6efa'
+                                                 '33cfe5c758749615f20'),
                                    b'100644 hello\0',
-                                   bytes.fromhex('907b308167f0880fb2a5c0e1614bb0c7620f9dc3')])
+                                   bytes.fromhex('907b308167f0880fb2a'
+                                                 '5c0e1614bb0c7620f9dc3')])
 
         self.commit_data = """tree 1c61f7259dcb770f46b194d941df4f08ff0a3970
 author Antoine R. Dumont (@ardumont) <antoine.romain.dumont@gmail.com> 1444054085 +0200
 committer Antoine R. Dumont (@ardumont) <antoine.romain.dumont@gmail.com> 1444054085 +0200
 
 initial
-""".encode('utf-8')
+""".encode('utf-8')  # NOQA
+        self.tag_data = """object 24d012aaec0bc5a4d2f62c56399053d6cc72a241
+type commit
+tag 0.0.1
+tagger Antoine R. Dumont (@ardumont) <antoine.romain.dumont@gmail.com> 1444225145 +0200
+
+blah
+""".encode('utf-8')  # NOQA
 
         self.checksums = {
             'blob_sha1_git': bytes.fromhex('d81cc0710eb6cf9efd5b920a8453e1'
-                                              'e07157b6cd'),
+                                           'e07157b6cd'),
             'tree_sha1_git': bytes.fromhex('ac212302c45eada382b27bfda795db'
                                            '121dacdb1c'),
             'commit_sha1_git': bytes.fromhex('e960570b2e6e2798fa4cfb9af2c399'
-                                               'd629189653'),
+                                             'd629189653'),
+            'tag_sha1_git': bytes.fromhex('bc2b99ba469987bcf1272c189ed534'
+                                          'e9e959f120'),
         }
 
     @istest
     def unknown_header_type(self):
         with self.assertRaises(ValueError) as cm:
             utils.hashdata(b'any-data', 'some-unknown-type')
 
         self.assertIn('Only supported types', cm.exception.args[0])
 
     @istest
     def hashdata_content(self):
         # when
         checksums = utils.hashdata(self.blob_data, 'blob')
 
         # then
-        self.assertEqual(checksums['sha1_git'], self.checksums['blob_sha1_git'])
+        self.assertEqual(checksums['sha1_git'],
+                         self.checksums['blob_sha1_git'])
 
     @istest
     def hashdata_tree(self):
         # when
         checksums = utils.hashdata(self.tree_data, 'tree')
 
         # then
-        self.assertEqual(checksums['sha1_git'], self.checksums['tree_sha1_git'])
+        self.assertEqual(checksums['sha1_git'],
+                         self.checksums['tree_sha1_git'])
 
     @istest
     def hashdata_revision(self):
         # when
         checksums = utils.hashdata(self.commit_data, 'commit')
 
         # then
-        self.assertEqual(checksums['sha1_git'], self.checksums['commit_sha1_git'])
+        self.assertEqual(checksums['sha1_git'],
+                         self.checksums['commit_sha1_git'])
+
+    @istest
+    def hashdata_tag(self):
+        # when
+        checksums = utils.hashdata(self.tag_data, 'tag')
+
+        # then
+        self.assertEqual(checksums['sha1_git'],
+                         self.checksums['tag_sha1_git'])