diff --git a/test/test_elasticity_2d_nonlinear_with_surface_load.jl b/test/test_elasticity_2d_nonlinear_with_surface_load.jl
index b6126f1..c23aaee 100644
--- a/test/test_elasticity_2d_nonlinear_with_surface_load.jl
+++ b/test/test_elasticity_2d_nonlinear_with_surface_load.jl
@@ -12,6 +12,7 @@ using JuliaFEM.Test
     # field problem
     block = Problem(Elasticity, "BLOCK", 2)
     block.properties.formulation = :plane_stress
+    block.properties.finite_strain = true
 
     elements = aster_create_elements(mesh, :BLOCK, :QU4)
     update!(elements, "youngs modulus", 288.0)
diff --git a/test/test_elasticity_3d_nonlinear_with_surface_load.jl b/test/test_elasticity_3d_nonlinear_with_surface_load.jl
index 25349ad..50cc367 100644
--- a/test/test_elasticity_3d_nonlinear_with_surface_load.jl
+++ b/test/test_elasticity_3d_nonlinear_with_surface_load.jl
@@ -24,6 +24,7 @@ using JuliaFEM.Test
     update!([element2], "displacement traction force", Vector{Float64}[[0.0, 0.0, -100.0] for i=1:4])
 
     elasticity_problem = Problem(Elasticity, "solve continuum block", 3)
+    elasticity_problem.properties.finite_strain = true
     push!(elasticity_problem, element1)
     push!(elasticity_problem, element2)