How can I mock an object's function call in another function?

I have a function called check_stuff and it instantiates an object and calls the function describe_continuous_backups, however, moto doesn't have support for this yet so I need to manually mock it myself. I have the following but it doesn't seem like I'm able to patch the object. How can I go about this?

def check_stuff(profile, table_name):
    session = boto3.Session(profile_name=profile)
    client = session.client('dynamodb', 'eu-west-1')
    some_stuff = client.describe_continuous_backups(TableName=table_name)
    #dostuff

@mock_dynamodb2
@mock.patch('boto3.Session.client.describe_continuous_backups', return_value={'foo': 'bar'})
def test_continuous_backup_disabled(self):
    table = self.client.create_table(
        TableName='Movies',
        KeySchema=[
            {
                'AttributeName': 'year',
                'KeyType': 'HASH'
            },
            {
                'AttributeName': 'title',
                'KeyType': 'RANGE'
            }
        ],
        AttributeDefinitions=[
            {
                'AttributeName': 'year',
                'AttributeType': 'N'
            },
            {
                'AttributeName': 'title',
                'AttributeType': 'S'
            },

        ],
        ProvisionedThroughput={
            'ReadCapacityUnits': 10,
            'WriteCapacityUnits': 10
        }
    )
    result = check_stuff('myprofile', 'some_table')