diff --git a/tests/test_isolatedStarAssociation.py b/tests/test_isolatedStarAssociation.py
index 2e5e1a907..6fe93a856 100644
--- a/tests/test_isolatedStarAssociation.py
+++ b/tests/test_isolatedStarAssociation.py
@@ -120,7 +120,7 @@ def _make_simdata(self,
                  ('apFlux_12_0_instFluxErr', 'f4'),
                  ('apFlux_12_0_instFlux_flag', '?'),
                  ('extendedness', 'f4'),
-                 ('extendedLikelihood', 'f4'),
+                 ('sizeExtendedness', 'f4'),
                  ('detect_isPrimary', bool),
                  ('visit', 'i4'),
                  ('detector', 'i4'),