diff --git a/unittests/test_tool.py b/unittests/test_tool.py
index 5ffb9a4572db07deb22f35ab05a00d87da09abb6..13beab16edad343bfb191421241fe709cb36e9ff 100755
--- a/unittests/test_tool.py
+++ b/unittests/test_tool.py
@@ -615,7 +615,7 @@ def change_identifiable_prop(ident):
 
 def change_non_identifiable_prop(ident):
     # the checks in here are only to make sure we change the record as we intend to
-    meas = ident._records[-4]
+    meas = ident._records[-1]
     assert meas.parents[0].name == "Measurement"
     resps = meas.properties[-1]
     assert resps.name == "responsible"