diff --git a/test/sumfact/poisson/sliced.mini b/test/sumfact/poisson/sliced.mini
index 55b6fcf7df3b0ee33f06bb97da0e8b555104c161..29a8a6bdb02d2173bd0f327f49af32a22062cb90 100644
--- a/test/sumfact/poisson/sliced.mini
+++ b/test/sumfact/poisson/sliced.mini
@@ -17,6 +17,7 @@ vectorization_strategy = explicit
 vectorization_horizontal = 1
 vectorization_vertical = 4
 quadrature_order = 6
+geometry_mixins = sumfact_equidistant
 
 [formcompiler.ufl_variants]
 degree = 3