--- /dev/null
+--TEST--
+Block names are unique per template
+--TEMPLATE--
+{% extends 'layout' %}
+{% block content -%}
+ {% filter title -%}
+ second
+ {% endfilter %}
+{% endblock %}
+--TEMPLATE(layout)--
+{% filter title -%}
+ first
+{% endfilter %}
+{% block content %}{% endblock %}
+--DATA--
+return array();
+--EXPECT--
+First
+Second