[Answered ]-Add additional field to response in pytest-django

You should add the organizer into the fields.

class LeadSerializer(serializers.ModelSerializer):
    class Meta:
        model = Lead
        # here I added the `organizer` field
        fields = ['id', 'first_name', 'last_name', 'age', 'agent', 'category', 'description', 'date_added', 'phone_number', 'email', 'converted_date', 'organizer']

    def create(self, validated_data):
        ...