diff --git a/test/generic/UnivPoly-test.jl b/test/generic/UnivPoly-test.jl
index 638f96e4b..c78abd843 100644
--- a/test/generic/UnivPoly-test.jl
+++ b/test/generic/UnivPoly-test.jl
@@ -4,4 +4,13 @@
 
   @test denominator(1//2*x+1//3*x^2) == 6
   @test denominator(2//3*x) == 3
+
+  @test ZZ(1)+x == 1+x
+  @test x+ZZ(1) == x+1
+
+  @test x-ZZ(1) == x-1
+  @test ZZ(1)-x == 1-x
+
+  @test ZZ(2)*x == 2*x
+  @test x*ZZ(2) == x*2
 end