Fix failing tests

src/sage/schemes/elliptic_curves/constructor.py

@@ -438,6 +438,9 @@ def create_key_and_extra_args(self, x=None, y=None, j=None, minimal_twist=True,
             # Interpret x as a Cremona or LMFDB label.
             from sage.databases.cremona import CremonaDatabase
             x, data = CremonaDatabase().coefficients_and_data(x)
+            # data is only valid for elliptic curves over QQ.
+            if R not in (None, QQ):
+                data = {}
             # User-provided keywords may override database entries.
             data.update(kwds)
             kwds = data
@@ -457,7 +460,7 @@ def create_key_and_extra_args(self, x=None, y=None, j=None, minimal_twist=True,
 
         return (R, tuple(R(a) for a in x)), kwds
 
-    def create_object(self, version, key, **kwds):
+    def create_object(self, version, key, *, names=None, **kwds):
         r"""
         Create an object from a ``UniqueFactory`` key.
 
@@ -467,6 +470,15 @@ def create_object(self, version, key, **kwds):
             sage: type(E)
             <class 'sage.schemes.elliptic_curves.ell_finite_field.EllipticCurve_finite_field_with_category'>
 
+        ``names`` is ignored at the moment, however it is used to support a convenient way to get a generator::
+
+            sage: E.<P> = EllipticCurve(QQ, [1, 3])
+            sage: P
+            (-1 : 1 : 1)
+            sage: E.<P> = EllipticCurve(GF(5), [1, 3])
+            sage: P
+            (4 : 1 : 1)
+
         .. NOTE::
 
             Keyword arguments are currently only passed to the

src/sage/schemes/hyperelliptic_curves/monsky_washnitzer.py

@@ -2412,7 +2412,7 @@ def __init__(self, Q, R=None, invert_y=True):
             if not hasattr(self, '_curve'):
                 if self._Q.degree() == 3:
                     ainvs = [0, self._Q[2], 0, self._Q[1], self._Q[0]]
-                    self._curve = EllipticCurve(ainvs, check_squarefree=R.is_field())
+                    self._curve = EllipticCurve(ainvs)
                 else:
                     self._curve = HyperellipticCurve(self._Q, check_squarefree=R.is_field())