r1b
diff --git a/‎sqlalchemy_bigquery/_json.py
Copy file name to clipboardExpand all lines: sqlalchemy_bigquery/_json.py
+3-5Lines changed: 3 additions & 5 deletions b/‎sqlalchemy_bigquery/_json.py
Copy file name to clipboardExpand all lines: sqlalchemy_bigquery/_json.py
+3-5Lines changed: 3 additions & 5 deletions
diff --git a/‎tests/unit/test__json.py
Copy file name to clipboardExpand all lines: tests/unit/test__json.py
+4-3Lines changed: 4 additions & 3 deletions b/‎tests/unit/test__json.py
Copy file name to clipboardExpand all lines: tests/unit/test__json.py
+4-3Lines changed: 4 additions & 3 deletions
@@ -36,10 +36,10 @@ def bind_expression(self, bindvalue):
         return sqlalchemy.func.PARSE_JSON(bindvalue, type_=self)
 
     def literal_processor(self, dialect):
-        json_serializer = dialect._json_serializer or json.dumps
+        super_proc = self.bind_processor(dialect)
 
         def process(value):
-            value = json_serializer(value)
+            value = super_proc(value)
             return repr(value)
 
         return process
@@ -67,9 +67,7 @@ def as_float(self, lax=False):
             return func_(self.expr, type_=sqltypes.Float)
 
         def as_numeric(self, precision, scale, asdecimal=True):
-            # No converter available - technically we could cast, but even
-            # then we can't satisfy this interface because it is not possible
-            # to cast to parameterized types.
+            # No converter available in BigQuery
             raise NotImplementedError()
 
     comparator_factory = Comparator
 
@@ -139,12 +139,13 @@ def test_json_casts(faux_conn, json_column, json_data, lax):
         f"SELECT {prefix}BOOL(PARSE_JSON('true')) = true AS `anon_1`"
     )
 
-# TODO: Casting as described in https://docs.sqlalchemy.org/en/20/core/type_basics.html#sqlalchemy.types.JSON
+def test_nulls(faux_conn, json_column, json_data):
+    pass
 
 # TODO: Test SQL NULL vs JSON null as described above
 
-# TODO: Test documented differences between JSON and JSON-formatted STRING
-
 # TODO: Support lax + lax recursive
 
+# TODO: Test documented differences between JSON and JSON-formatted STRING
+
 # TODO: Provide some GenericFunction, or at least docs for how to use type_