diff --git a/tests/ext/test_matproj.py b/tests/ext/test_matproj.py
index c51fe2ecbd4..4ea35e47f01 100644
--- a/tests/ext/test_matproj.py
+++ b/tests/ext/test_matproj.py
@@ -534,6 +534,7 @@ def test_get_summary(self):
 
         doc = self.rester.summary.search(material_ids="mp-19770,mp-19017", _fields="formula_pretty,energy_above_hull")
         assert len(doc) == 2
+        assert len(doc[0]) == 2
         assert doc[0]["energy_above_hull"] >= 0
         assert doc[1]["energy_above_hull"] >= 0