diff --git a/tests/test_functions.py b/tests/test_functions.py
index cceab97e..dc63a7d9 100644
--- a/tests/test_functions.py
+++ b/tests/test_functions.py
@@ -142,6 +142,7 @@ def test_mpmath_normalize(sign, man, exp, prec, rnd):
     sign = int(sign)
     bc = mman.bit_length()
     res = mpmath.libmp.libmpf._normalize(sign, man, exp, bc, prec, rnd)
+    assert all(type(_) is int for _ in res)
     assert _mpmath_normalize(sign, mman, exp, bc, prec, rnd) == res
 
 
@@ -154,6 +155,7 @@ def test_mpmath_create(man, exp, prec, rnd):
     mpmath = pytest.importorskip("mpmath")
     mman = mpz(man)
     res = mpmath.libmp.from_man_exp(man, exp, prec, rnd)
+    assert all(type(_) is int for _ in res)
     assert _mpmath_create(mman, exp, prec, rnd) == res
     assert mman == man
     assert _mpmath_create(man, exp, prec, rnd) == res
diff --git a/tests/test_mpz.py b/tests/test_mpz.py
index 1f490819..03632716 100644
--- a/tests/test_mpz.py
+++ b/tests/test_mpz.py
@@ -513,8 +513,6 @@ def test_divmod_bulk(x, y):
         with pytest.raises(ZeroDivisionError):
             x % my
         return
-    if y < 0 and platform.python_implementation() == "GraalVM":
-        return  # issue oracle/graalpython#534
     r = x // y
     assert mx // my == r
     assert mx // y == r