diff --git a/test/test_fields.jl b/test/test_fields.jl
index af07593..94ca3a8 100644
--- a/test/test_fields.jl
+++ b/test/test_fields.jl
@@ -44,6 +44,7 @@ end
     @test interpolate(a, 0.0) == (1, 2)
     update!(a, (2,3))
     @test a == (2,3)
+    @test (2,3) == a
 
     # vector field
     b = DVTI(([1,2], [2,3]))
diff --git a/test/test_problems.jl b/test/test_problems.jl
index bc2ed2b..a8be814 100644
--- a/test/test_problems.jl
+++ b/test/test_problems.jl
@@ -26,9 +26,17 @@ function P2()
     return P2(:incremental)
 end
 
+type P3 <: FieldProblem
+end
+
 get_unknown_field_name(p::P1) = "P1"
 get_formulation_type(p::Problem{P2}) = p.properties.formulation
 
+@testset "test get_unknown_field_name" begin
+    p = Problem(P3, "P3", 1)
+    @test get_unknown_field_name(p) == "N/A"
+end
+
 @testset "test creating new problems" begin
     p1 = Problem(P1, "P1", 1)
     p2 = Problem(P2, "P2", 2, "p")
@@ -241,3 +249,12 @@ end
     @test isapprox(C, C_expected)
     @test isapprox(g, g_expected)
 end
+
+@testset "test deprecated assembly procedure" begin
+    problem = Problem(P3, "P3", 1)
+    elements = [Element(Seg2, [1, 2])]
+    add_elements!(problem, elements)
+    assemble!(problem.assembly, problem, first(elements), 0.0)
+    assemble!(problem.assembly, problem, problem.elements, 0.0)
+    assemble_elements!(problem, problem.assembly, elements, 0.0)
+end