diff --git a/test/test_sympy.py b/test/test_sympy.py
index b586b42058d3c49d8f035f1df8f465559eb3cfa0..5415cb6227b82978dbc774d1a50075d8eca2cc6f 100644
--- a/test/test_sympy.py
+++ b/test/test_sympy.py
@@ -88,8 +88,7 @@ def _test_from_pymbolic(mapper, sym, use_symengine):
 
     assert mapper(prim.Substitution(x_**2, ("x",), (y_,))) == \
         sym.Subs(x**2, (x,), (y,))
-    # FIXME in symengine
-    deriv = sym.Derivative(x**2, (x,)) if use_symengine else sym.Derivative(x**2, x)
+    deriv = sym.Derivative(x**2, x)
     assert mapper(prim.Derivative(x_**2, ("x",))) == deriv
 
     assert mapper(x_[0]) == sym.Symbol("x_0")