diff --git a/swh/indexer/tests/test_origin_head.py b/swh/indexer/tests/test_origin_head.py
index e6a5776..1558eb3 100644
--- a/swh/indexer/tests/test_origin_head.py
+++ b/swh/indexer/tests/test_origin_head.py
@@ -1,86 +1,86 @@
 # Copyright (C) 2017-2018  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
-import logging
 
 from swh.indexer.origin_head import OriginHeadIndexer
-from swh.indexer.tests.test_utils import MockIndexerStorage, MockStorage
+from swh.indexer.tests.test_utils import (
+    MockIndexerStorage, MockStorage, BASE_TEST_CONFIG
+)
 
 
 class OriginHeadTestIndexer(OriginHeadIndexer):
     """Specific indexer whose configuration is enough to satisfy the
        indexing tests.
     """
-    def prepare(self):
-        self.config = {
+    def parse_config_file(self, *args, **kwargs):
+        return {
+            **BASE_TEST_CONFIG,
             'tools': {
                 'name': 'origin-metadata',
                 'version': '0.0.1',
                 'configuration': {},
             },
             'tasks': {
                 'revision_metadata': None,
                 'origin_intrinsic_metadata': None,
             }
         }
+
+    def prepare(self):
+        super().prepare()
         self.storage = MockStorage()
         self.idx_storage = MockIndexerStorage()
-        self.log = logging.getLogger('swh.indexer')
-        self.objstorage = None
-        self.tools = self.register_tools(self.config['tools'])
-        self.tool = self.tools[0]
-        self.results = None
 
     def persist_index_computations(self, results, policy_update):
         self.results = results
 
 
 class OriginHead(unittest.TestCase):
     def test_git(self):
         indexer = OriginHeadTestIndexer()
         indexer.run(
                 ['git+https://github.com/SoftwareHeritage/swh-storage'])
         self.assertEqual(indexer.results, [{
             'revision_id': b'8K\x12\x00d\x03\xcc\xe4]bS\xe3\x8f{'
                            b'\xd7}\xac\xefrm',
             'origin_id': 52189575}])
 
     def test_ftp(self):
         indexer = OriginHeadTestIndexer()
         indexer.run(
                 ['ftp+rsync://ftp.gnu.org/gnu/3dldf'])
         self.assertEqual(indexer.results, [{
             'revision_id': b'\x8e\xa9\x8e/\xea}\x9feF\xf4\x9f\xfd\xee'
                            b'\xcc\x1a\xb4`\x8c\x8by',
             'origin_id': 4423668}])
 
     def test_deposit(self):
         indexer = OriginHeadTestIndexer()
         indexer.run(
                 ['deposit+https://forge.softwareheritage.org/source/'
                  'jesuisgpl/'])
         self.assertEqual(indexer.results, [{
             'revision_id': b'\xe7n\xa4\x9c\x9f\xfb\xb7\xf76\x11\x08{'
                            b'\xa6\xe9\x99\xb1\x9e]q\xeb',
             'origin_id': 77775770}])
 
     def test_pypi(self):
         indexer = OriginHeadTestIndexer()
         indexer.run(
                 ['pypi+https://pypi.org/project/limnoria/'])
         self.assertEqual(indexer.results, [{
             'revision_id': b'\x83\xb9\xb6\xc7\x05\xb1%\xd0\xfem\xd8k'
                            b'A\x10\x9d\xc5\xfa2\xf8t',
             'origin_id': 85072327}])
 
     def test_svn(self):
         indexer = OriginHeadTestIndexer()
         indexer.run(
                 ['svn+http://0-512-md.googlecode.com/svn/'])
         self.assertEqual(indexer.results, [{
             'revision_id': b'\xe4?r\xe1,\x88\xab\xec\xe7\x9a\x87\xb8'
                            b'\xc9\xad#.\x1bw=\x18',
             'origin_id': 49908349}])