fix test

Author: dkarrasch

test/kronecker.jl

@@ -42,10 +42,10 @@ using Test, LinearMaps, LinearAlgebra, SparseArrays
         @test kron(A, A, A) ≈ Matrix(@inferred kron(LA, LA, LA)) ≈ Matrix(@inferred LA^⊗(3)) ≈ Matrix(@inferred A^⊗(3))
         LAs = LinearMap(sparse(A))
         K = @inferred kron(A, A, A, LAs)
-        @inferred squarekron(A, A, LAs)
+        VERSION > v"1.7" && @inferred squarekron(A, A, LAs)
         K2 = squarekron(A, A, A, LAs)
         @test K isa LinearMaps.KroneckerMap
-        @test Matrix(K) ≈ Matrix(K2) ≈ kron(A, A, A)
+        @test Matrix(K) ≈ Matrix(K2) ≈ kron(A, A, A, A)
         @test convert(AbstractMatrix, K) isa SparseMatrixCSC
         @test convert(AbstractMatrix, K) ≈ kron(A, A, A, A)
         @test sparse(K) ≈ kron(A, A, A, A)