Fix tests

Author: user202729

src/sage/rings/polynomial/multi_polynomial_ideal.py

@@ -4978,7 +4978,9 @@ def reduce(self, f):
             sage: I.reduce(pi.n())
             Traceback (most recent call last):
             ...
-            TypeError: element belong to Real Field with 53 bits of precision, cannot coerce to Multivariate Polynomial Ring in x, y over Rational Field
+            TypeError: no canonical coercion from Real Field with 53 bits of precision to Multivariate Polynomial Ring in x, y over Rational Field
+            sage: I.reduce(float(pi.n()))
+            TypeError: no canonical coercion from <class 'float'> to Multivariate Polynomial Ring in x, y over Rational Field
         """
         try:
             strat = self._groebner_strategy()