diff --git a/tests/validation/multigrid/test_shear_refinement_example_gpu.py b/tests/validation/multigrid/test_shear_refinement_example_gpu.py
index 7a6e958..09921fb 100644
--- a/tests/validation/multigrid/test_shear_refinement_example_gpu.py
+++ b/tests/validation/multigrid/test_shear_refinement_example_gpu.py
@@ -8,14 +8,17 @@ from contextlib import ExitStack
 import unittest
 import numpy as np
 from CelerisLab.cuda.context import CudaContext
-from research.shear_refinement.example import (CHILDREN, make, initialize, observe,
-                                                topology, objects)
+from CelerisLab.lbm.refinement_stepper import FixedPatchStepper
+from research.shear_refinement.example import (CFG, PARENTS, CHILDREN, initialize,
+                                                observe, topology, objects)
 
 
 class ShearRefinementGPU(unittest.TestCase):
     def test_measured_growth_matches_explicit_manual_continuation(self):
         with CudaContext(0) as ctx, ExitStack() as owned:
-            old = owned.enter_context(make(ctx))
+            old = owned.enter_context(FixedPatchStepper(
+                CFG, context=ctx, refinements=[PARENTS, CHILDREN],
+                level_blocks=[(4, 4)] * 3, level_objects=[(), (), objects()]))
             initialize(old)
             old.step(2)
             before = old.download()