*args, **kwargs in jinja2 macros

The trick is that kwargs has to be accessed at least once in any macro that should accept them. That is to say, you must call {{ kwargs }} once in macro body without declaring it in macro argument list. The same is true for {{ varargs }}.

This will not work

{% macro example_2(one, two) %}
    * {{one}} - {{two}}
{% endmacro %}
{{example_2(1, 2, test="Hello")}}

This will

{% macro example_2(one, two) %}
    * {{one}} - {{two}}
    * {{kwargs}}
{% endmacro %}
{{example_2(1, 2, test="Hello")}}