diff --git a/swh/storage/tests/test_storage.py b/swh/storage/tests/test_storage.py
--- a/swh/storage/tests/test_storage.py
+++ b/swh/storage/tests/test_storage.py
@@ -1140,11 +1140,13 @@
         swh_storage.refresh_stat_counters()
         assert swh_storage.stat_counters()['release'] == 2
 
-    def test_release_add_same_twice(self, swh_storage):
-        result = swh_storage.release_add([data.release, data.release])
+    def test_release_add_same_thrice(self, swh_storage):
+        result = swh_storage.release_add([
+            data.release, data.release, data.release
+        ])
 
         assert list(result) == ['release:add']
-        assert 1 <= result['release:add'] <= 2
+        assert 1 <= result['release:add'] <= 3
 
     def test_release_add_from_generator(self, swh_storage):
         def _rel_gen():