LinearAlgebra/addmul/mul!(::Matrix{Int32}, ::LinearAlgebra.Tridiagonal{Int32, V} where V<:AbstractVector{Int32}, ::LinearAlgebra.Hermitian{Int32, S} where S<:(AbstractMatrix{<:Int32}), α, β)/α = 2, β = false @test ≈(collect(returned_mat), exp_val, rtol = rtol, atol = atol)