Index: /issm/trunk-jpl/test/NightlyRun/test423.py
===================================================================
--- /issm/trunk-jpl/test/NightlyRun/test423.py	(revision 14599)
+++ /issm/trunk-jpl/test/NightlyRun/test423.py	(revision 14600)
@@ -43,6 +43,10 @@
 element_on_iceshelf_soft=md.results.TransientSolution[0].MaskElementonfloatingice
 
+md.groundingline.migration='SubelementMigration'
+md=solve(md,TransientSolutionEnum())
+element_on_iceshelf_subelement=md.results.TransientSolution[0].GLlevelset
+
 #Fields and tolerances to track changes
-field_names     =['ElementOnIceShelfAgressive','ElementOnIceShelfSoft']
-field_tolerances=[1e-13,1e-13]
-field_values=[element_on_iceshelf_agressive,element_on_iceshelf_soft]
+field_names     =['ElementOnIceShelfAgressive','ElementOnIceShelfSoft','ElementOnIceShelfSubelement']
+field_tolerances=[1e-13,1e-13,1e-13]
+field_values=[element_on_iceshelf_agressive,element_on_iceshelf_soft,element_on_iceshelf_subelement]