diff --git a/test/test_select_device.jl b/test/test_select_device.jl
index 5f80c63..4a5b37a 100644
--- a/test/test_select_device.jl
+++ b/test/test_select_device.jl
@@ -16,20 +16,57 @@ nprocs = MPI.Comm_size(MPI.COMM_WORLD); # NOTE: these tests can run with any num
 
 @testset "$(basename(@__FILE__)) (processes: $nprocs)" begin
     @testset "1. select_device" begin
-        @static if test_cuda
-            me, = init_global_grid(3, 4, 5; quiet=true, init_MPI=false, device_type="CUDA");
-            gpu_id = select_device();
-            @test gpu_id < length(CUDA.devices())
-            finalize_global_grid(finalize_MPI=false);
+        @static if test_cuda && !test_amdgpu
+            @testset "\"CUDA\"" begin
+                me, = init_global_grid(3, 4, 5; quiet=true, init_MPI=false, device_type="CUDA");
+                gpu_id = select_device();
+                @test gpu_id < length(CUDA.devices())
+                finalize_global_grid(finalize_MPI=false);
+            end;
+            @testset "\"auto\"" begin
+                me, = init_global_grid(3, 4, 5; quiet=true, init_MPI=false, device_type="auto");
+                gpu_id = select_device();
+                @test gpu_id < length(CUDA.devices())
+                finalize_global_grid(finalize_MPI=false);
+            end;
         end
-        @static if test_amdgpu
-            me, = init_global_grid(3, 4, 5; quiet=true, init_MPI=false, device_type="AMDGPU");
-            gpu_id = select_device();
-            @test gpu_id < length(AMDGPU.devices())
-            finalize_global_grid(finalize_MPI=false);
+        @static if test_amdgpu && !test_cuda
+            @testset "\"AMDGPU\"" begin
+                me, = init_global_grid(3, 4, 5; quiet=true, init_MPI=false, device_type="AMDGPU");
+                gpu_id = select_device();
+                @test gpu_id < length(AMDGPU.devices())
+                finalize_global_grid(finalize_MPI=false);
+            end;
+            @testset "\"auto\"" begin
+                me, = init_global_grid(3, 4, 5; quiet=true, init_MPI=false, device_type="auto");
+                gpu_id = select_device();
+                @test gpu_id < length(AMDGPU.devices())
+                finalize_global_grid(finalize_MPI=false);
+            end;
+        end
+        @static if !(test_cuda || test_amdgpu) || (test_cuda && test_amdgpu)
+            @testset "\"auto\"" begin
+                me, = init_global_grid(3, 4, 5; quiet=true, init_MPI=false, device_type="auto");
+                @test_throws ErrorException select_device()
+                finalize_global_grid(finalize_MPI=false);
+            end;
+        end
+        @static if !test_cuda
+            @testset "\"CUDA\"" begin
+                me, = init_global_grid(3, 4, 5; quiet=true, init_MPI=false, device_type="CUDA");
+                @test_throws ErrorException select_device()
+                finalize_global_grid(finalize_MPI=false);
+            end;
+        end
+        @static if !test_amdgpu
+            @testset "\"AMDGPU\"" begin
+                me, = init_global_grid(3, 4, 5; quiet=true, init_MPI=false, device_type="AMDGPU");
+                @test_throws ErrorException select_device()
+                finalize_global_grid(finalize_MPI=false);
+            end;
         end
-        @static if !(test_cuda || test_amdgpu)
-            me, = init_global_grid(3, 4, 5; quiet=true, init_MPI=false);
+        @testset "\"none\"" begin
+            me, = init_global_grid(3, 4, 5; quiet=true, init_MPI=false, device_type="none");
             @test_throws ErrorException select_device()
             finalize_global_grid(finalize_MPI=false);
         end