--- a/test/Grids/multiblockgrids_test.jl	Wed Mar 12 09:32:32 2025 +0100
+++ b/test/Grids/multiblockgrids_test.jl	Wed Mar 12 09:34:00 2025 +0100
@@ -1,5 +1,29 @@
 using Diffinitive.Grids
 
+@testset "MultiBlockGrid" begin
+    @test MultiBlockGrid <: Grid
+
+    @testset "Constructors" begin
+        g₁ = equidistant_grid(0,1,5)
+        g₂ = equidistant_grid(0,1,5)
+        g₃ = equidistant_grid(0,1,5)
+
+
+        # Vector
+        C = connection.([
+            (1, UpperBoundary(), 2, LowerBoundary()),
+            (2, UpperBoundary(), 3, LowerBoundary()),
+        ])
+
+        @test MultiBlockGrid([g₁,g₂,g₃], C) isa Grid{Float64,1}
+        @test MultiBlockGrid([g₁,g₂,g₃], C) isa MultiBlockGrid{Float64,1}
+
+        # Dictionary
+        @test MultiBlockGrid(Dict(:a=>g₁, :b=>g₂), [connection(:a, UpperBoundary(), :b, LowerBoundary())]) isa MultiBlockGrid{Float64,1}
+    end
+end
+
+
 @testset "MultiBlockBoundary" begin
     @test MultiBlockBoundary{1,UpperBoundary}() isa BoundaryIdentifier