diff --git a/testing/templates/let-base.html b/testing/templates/let-base.html
new file mode 100644
index 00000000..3ddfb62f
--- /dev/null
+++ b/testing/templates/let-base.html
@@ -0,0 +1 @@
+{% block body %}{% endblock %}
diff --git a/testing/templates/let-child.html b/testing/templates/let-child.html
new file mode 100644
index 00000000..3097bdab
--- /dev/null
+++ b/testing/templates/let-child.html
@@ -0,0 +1,5 @@
+{% extends "let-base.html" %}
+{% block body -%}
+  {% let x = 1 %}
+  {{- x -}}
+{%- endblock %}