diff --git a/test/layers/basic.jl b/test/layers/basic.jl
index 0c12b22d11..8c8e15422d 100644
--- a/test/layers/basic.jl
+++ b/test/layers/basic.jl
@@ -89,19 +89,18 @@ import Flux: activations
 
   @testset "Diagonal" begin
     @test length(Flux.Diagonal(10)(randn(10))) == 10
-    @test length(Flux.Diagonal(10)(1)) == 10
     @test length(Flux.Diagonal(10)(randn(1))) == 10
     @test length(Flux.Diagonal(10; bias = false)(randn(10))) == 10
     @test_throws DimensionMismatch Flux.Diagonal(10)(randn(2))
 
     @test Flux.Diagonal(2)([1 2]) == [1 2; 1 2]
-    @test Flux.Diagonal(2)([1,2]) == [1,2]
+    @test Flux.Diagonal(2)([1, 2]) == [1, 2]
     @test Flux.Diagonal(2; bias = false)([1 2; 3 4]) == [1 2; 3 4]
 
-    @test Flux.Diagonal(2)(rand(2,3,4)) |> size == (2, 3, 4)
-    @test Flux.Diagonal(2,3)(rand(2,3,4)) |> size == (2, 3, 4)
-    @test Flux.Diagonal(2, 3, 4; bias = false)(rand(2,3,4)) |> size == (2, 3, 4)
-    @test Flux.Diagonal(2, 3; bias = false)(rand(2,1,4)) |> size == (2, 3, 4)
+    @test Flux.Diagonal(2)(rand(2, 3, 4)) |> size == (2, 3, 4)
+    @test Flux.Diagonal(2, 3;)(rand(2, 3, 4)) |> size == (2, 3, 4)
+    @test Flux.Diagonal(2, 3, 4; bias = false)(rand(2, 3, 4)) |> size == (2, 3, 4)
+    @test Flux.Diagonal(2, 3; bias = false)(rand(2, 1, 4)) |> size == (2, 3, 4)
   end
 
   @testset "Maxout" begin