diff --git a/test/runtests.jl b/test/runtests.jl
index cd1e71171014f52360c46724eae477b9a423eacc..03f17ec0797c8f1be84c3601b58573bfed7b72c1 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -96,6 +96,10 @@ end
         s1 = val(cumsum(B2).tval[2])
         s2 = Set((StringMonoid âˆ˜ reverse âˆ˜ val).((val âˆ˜ cumsum)(rB2)[2]))
         @test s1 == s2
+
+        # renorm
+        @test Base.isapprox(val(cumsum(A1 |> renorm; n = 100)), val(one(K)), atol=1e-6)
+        @test Base.isapprox(val(cumsum(A2 |> renorm; n = 100)), val(one(K)), atol=1e-6)
     end
 end