diff --git a/test/blockstructured/poisson/3d/poisson.mini b/test/blockstructured/poisson/3d/poisson.mini
index e9e34187a447198666d8de5a11e77e54aaa4ebb1..796c8652795d4e6a9715df7d2ac364d12b1638b9 100644
--- a/test/blockstructured/poisson/3d/poisson.mini
+++ b/test/blockstructured/poisson/3d/poisson.mini
@@ -17,4 +17,5 @@ compare_l2errorsquared = 1e-7
 numerical_jacobian = 1, 0 | expand num
 blockstructured = 1
 number_of_blocks = 3
+geometry_mixins = blockstructured_equidistant