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--- a/Allura/allura/tests/test_tasks.py
+++ b/Allura/allura/tests/test_tasks.py
@@ -68,7 +68,7 @@
     def test_del_artifacts(self):
         old_shortlinks = M.Shortlink.query.find().count()
         old_solr_size = len(g.solr.db)
-        artifacts = [ _TestArtifact() for x in range(5) ]
+        artifacts = [ _TestArtifact(_shorthand_id='ta_%s' % x) for x in range(5) ]
         M.artifact_orm_session.flush()
         arefs = [ M.ArtifactReference.from_artifact(a) for a in artifacts ]
         ref_ids = [ r._id for r in arefs ]