diff --git a/test/utils.jl b/test/utils.jl
index c60645c6..2b4692a9 100644
--- a/test/utils.jl
+++ b/test/utils.jl
@@ -1,5 +1,5 @@
 using Flux
-using Flux: throttle, jacobian, glorot_uniform, glorot_normal
+using Flux: throttle, jacobian, glorot_uniform, glorot_normal, stack, unstack
 using StatsBase: std
 using Random
 using Test
@@ -97,3 +97,11 @@ end
   @test eltype(f32(f64(m))[1].W.data) == Float32
   @test Tracker.isleaf(f32(f64(m))[1].W)
 end
+
+@testset "Stacking" begin
+  stacked_array=[ 8 9 3 5; 9 6 6 9; 9 1 7 2; 7 4 10 6 ]
+  unstacked_array=[[8, 9, 9, 7], [9, 6, 1, 4], [3, 6, 7, 10], [5, 9, 2, 6]]
+  @test unstack(stacked_array, 2) == unstacked_array
+  @test stack(unstacked_array, 2) == stacked_array
+  @test stack(unstack(stacked_array, 1), 1) == stacked_array
+end