diff --git a/swh/search/tests/test_search.py b/swh/search/tests/test_search.py
index f23d78f..610c44b 100644
--- a/swh/search/tests/test_search.py
+++ b/swh/search/tests/test_search.py
@@ -1,37 +1,39 @@
 # Copyright (C) 2019  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 pytest
 
 from swh.model.model import Origin
 from swh.search.elasticsearch import ElasticSearch
 
 
-def test_origin_url_unique_substring(elasticsearch_host):
+def test_origin_url_unique_word_prefix(elasticsearch_host):
     search = ElasticSearch([elasticsearch_host])
     search.initialize()
     search.origin_add([
         Origin(url='http://foobar.baz', type=None),
         Origin(url='http://barbaz.qux', type=None),
     ])
-    search.origin_dump()
 
     results = search.origin_search('foobar')
     assert results == {'cursor': None, 'results': [{'url': 'http://foobar.baz'}]}
 
     results = search.origin_search('barb')
     assert results == {'cursor': None, 'results': [{'url': 'http://barbaz.qux'}]}
 
     # 'bar' is part of 'foobar', but is not the beginning of it
     results = search.origin_search('bar')
     assert results == {'cursor': None, 'results': [{'url': 'http://barbaz.qux'}]}
 
     results = search.origin_search('barbaz')
     assert results == {'cursor': None, 'results': [{'url': 'http://barbaz.qux'}]}
 
+    results = search.origin_search('qu')
+    assert results == {'cursor': None, 'results': [{'url': 'http://barbaz.qux'}]}
+
     results = search.origin_search('qux')
     assert results == {'cursor': None, 'results': [{'url': 'http://barbaz.qux'}]}