diff --git a/swh/loader/git/tests/test_converters.py b/swh/loader/git/tests/test_converters.py
new file mode 100644
index 0000000..cd8ee67
--- /dev/null
+++ b/swh/loader/git/tests/test_converters.py
@@ -0,0 +1,76 @@
+# 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 os
+import shutil
+import subprocess
+import tempfile
+import unittest
+
+from nose.tools import istest
+import pygit2
+
+import swh.loader.git.converters as converters
+from swh.core.hashutil import hex_to_hash
+
+
+class TestConverters(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.repo_path = tempfile.mkdtemp()
+        cls.repo = pygit2.init_repository(cls.repo_path, bare=True)
+
+        fast_export = os.path.join(os.path.dirname(__file__),
+                                   '../../../../..',
+                                   'swh-storage-testdata',
+                                   'git-repos',
+                                   'example-submodule.fast-export.xz')
+
+        xz = subprocess.Popen(
+            ['xzcat'],
+            stdin=open(fast_export, 'rb'),
+            stdout=subprocess.PIPE,
+        )
+
+        git = subprocess.Popen(
+            ['git', 'fast-import'],
+            stdin=xz.stdout,
+            stdout=subprocess.PIPE,
+            cwd=cls.repo_path,
+        )
+
+        # flush stdout of xz
+        xz.stdout.close()
+        git.communicate()
+
+    @classmethod
+    def tearDownClass(cls):
+        super().tearDownClass()
+
+        shutil.rmtree(cls.repo_path)
+        print(cls.repo_path)
+
+    def setUp(self):
+        super().setUp()
+
+        self.blob_id = pygit2.Oid(
+            hex='28c6f4023d65f74e3b59a2dea3c4277ed9ee07b0')
+        self.blob = {
+            'sha1_git': self.blob_id.raw,
+            'sha1': hex_to_hash('4850a3420a2262ff061cb296fb915430fa92301c'),
+            'sha256': hex_to_hash('fee7c8a485a10321ad94b64135073cb5'
+                                  '5f22cb9f57fa2417d2adfb09d310adef'),
+            'data': (b'[submodule "example-dependency"]\n'
+                     b'\tpath = example-dependency\n'
+                     b'\turl = https://github.com/githubtraining/'
+                     b'example-dependency.git\n'),
+            'length': 124,
+            }
+
+    @istest
+    def blob_to_content(self):
+        content = converters.blob_to_content(self.blob_id, self.repo)
+        self.assertEqual(self.blob, content)