diff --git a/test/tracker.jl b/test/tracker.jl
index 2b0e04d7bd..f39546eaa8 100644
--- a/test/tracker.jl
+++ b/test/tracker.jl
@@ -33,6 +33,10 @@ gradtest(f, dims...) = gradtest(f, rand.(dims)...)
 @test gradtest(vcat, rand(5), rand(3), rand(8))
 @test gradtest(vcat, rand(5,2), rand(3,2), rand(8,2))
 
+@test gradtest(vcat, rand(5,2,3), rand(3,2,3), rand(8,2,3))
+@test gradtest(hcat, rand(5), rand(5), rand(5,2))
+@test gradtest(hcat, rand(5,2), rand(5,3), rand(5,5))
+@test gradtest(hcat, rand(5,2,3), rand(5,3,3), rand(5,5,3))
 @test gradtest((i...) -> cat(1,i...), rand(5), rand(3))
 @test gradtest((i...) -> cat(1,i...), rand(5), rand(8))
 @test gradtest((i...) -> cat(1,i...), rand(5,2),rand(3,2), rand(8,2))
@@ -45,9 +49,9 @@ gradtest(f, dims...) = gradtest(f, rand.(dims)...)
 @test gradtest(x -> repmat(x, 5,5), rand(4,5))
 @test gradtest(x -> repmat(x, 5), rand(4,5))
 
-@test gradtest(kron,rand(5), rand(3))
+@test gradtest(kron, rand(5), rand(3))
 @test gradtest(kron, rand(5), rand(3), rand(8))
-@test gradtest(kron,rand(5,1), rand(3,1))
+@test gradtest(kron, rand(5,1), rand(3,1))
 @test gradtest(kron, rand(5,1), rand(3,1), rand(8,1))
 @test gradtest(kron, rand(5,2), rand(3,2), rand(8,2))