diff --git a/util/test/rdtest/shared/Draw_Zoo.py b/util/test/rdtest/shared/Draw_Zoo.py
index d155fbdc2..a6c717fa9 100644
--- a/util/test/rdtest/shared/Draw_Zoo.py
+++ b/util/test/rdtest/shared/Draw_Zoo.py
@@ -138,7 +138,7 @@ class Draw_Zoo(rdtest.TestCase):
         rdtest.log.success("Checked draw {}".format(draw.eventId))
 
     def check_debug(self, vtx, idx, inst, postvs):
-        trace: rd.ShaderDebugTrace = self.controller.DebugVertex(vtx, inst, idx)
+        trace: rd.ShaderDebugTrace = self.controller.DebugVertex(vtx, inst, idx, 0)
 
         if trace.debugger is None:
             self.controller.FreeTrace(trace)
diff --git a/util/test/tests/Iter_Test.py b/util/test/tests/Iter_Test.py
index 02203cdf9..5819ec02a 100644
--- a/util/test/tests/Iter_Test.py
+++ b/util/test/tests/Iter_Test.py
@@ -104,7 +104,7 @@ class Iter_Test(rdtest.TestCase):
 
         postvs = self.get_postvs(draw, rd.MeshDataStage.VSOut, first_index=vtx, num_indices=1, instance=inst)
 
-        trace: rd.ShaderDebugTrace = self.controller.DebugVertex(vtx, inst, idx)
+        trace: rd.ShaderDebugTrace = self.controller.DebugVertex(vtx, inst, idx, 0)
 
         if trace.debugger is None:
             self.controller.FreeTrace(trace)