diff --git a/test/test_preprocess.jl b/test/test_preprocess.jl
index 5313e5c..f760f33 100644
--- a/test/test_preprocess.jl
+++ b/test/test_preprocess.jl
@@ -19,3 +19,15 @@ using JuliaFEM.Testing
     @test mesh.elements[1] == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
 end
 
+@testset "add_nodes! and add_elements!" begin
+    mesh = Mesh()
+    dic = Dict(1 => [1.,1.,1.], 2 => [2.,2.,2])
+    add_nodes!(mesh, dic)
+    @test mesh.nodes == dic
+
+    vec = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+    add_elements!(mesh,Dict(1=>(:Tet10,vec),
+                            11=>(:Tet10,vec)))
+    @test mesh.elements[1] == vec
+    @test mesh.elements[11] == vec
+end