Update test/runtests.jl

Author: ChrisRackauckas

test/runtests.jl

@@ -6,6 +6,6 @@ using Test
     b = rand(5)
     prob = LinearProblem(A, b)
     @test A * solve(prob, LUFactorization();alias_A = false, alias_b = false) ≈ b
-    @test A * solve(deepcopy(prob), QRFactorization();alias_A = false, alias_b = false) ≈ b
+    @test A * solve(prob, QRFactorization();alias_A = false, alias_b = false) ≈ b
     @test A * solve(deepcopy(prob), SVDFactorization();alias_A = false, alias_b = false) ≈ b
 end