diff --git a/test/runtests.jl b/test/runtests.jl
index e1822cc..e96867d 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -86,6 +86,7 @@ end
     DynamicPolynomials.@polyvar x
     V = typeof(x)
     @test promote_type(V, Any) == Any
+    @test promote_type(typeof(x/2), Any) == Any
 end
 
 include("mvp.jl")