--- a/test/Grids/grid_test.jl	Fri Mar 03 15:40:20 2023 +0100
+++ b/test/Grids/grid_test.jl	Fri Mar 03 15:42:05 2023 +0100
@@ -14,6 +14,16 @@
 
     @test target_manifold_dim(DummyGrid{Int, 1}()) == 1
     @test target_manifold_dim(DummyGrid{SVector{3,Float64}, 2}()) == 3
+
+    @testset "component_type" begin
+        @test component_type(DummyGrid{Int,1}()) == Int
+        @test component_type(DummyGrid{Float64,1}()) == Float64
+        @test component_type(DummyGrid{Rational,1}()) == Rational
+
+        @test component_type(DummyGrid{SVector{3,Int},2}()) == Int
+        @test component_type(DummyGrid{SVector{2,Float64},3}()) == Float64
+        @test component_type(DummyGrid{SVector{4,Rational},4}()) == Rational
+    end
 end
 
 @testset "eval_on" begin