diff --git a/unittests/test_crawler.py b/unittests/test_crawler.py
index 2afc1c76bde0d1d61959aaed12b6deabe5ace86a..e7a226d7c17d07ebc00cbc1479de83b6f9a98832 100644
--- a/unittests/test_crawler.py
+++ b/unittests/test_crawler.py
@@ -480,6 +480,8 @@ a: ([b1, b2])
 
     crawler = Crawler(identifiableAdapter=ident_adapter)
 
+    crawler.synchronize(commit_changes=False,
+                        crawled_data=[rec_a, *rec_b, *rec_c])
     with raises(RuntimeError) as rte:
         crawler.synchronize(commit_changes=False,
                             crawled_data=[rec_a, *rec_b, *rec_c])