diff --git a/tests/markdown/basic.test.js b/tests/markdown/basic.test.js
index 174e43d7e..459bb22c4 100644
--- a/tests/markdown/basic.test.js
+++ b/tests/markdown/basic.test.js
@@ -13,3 +13,9 @@ test('Processes the markdown within an HTML block if its just a class wrapper',
 	const rendered = Markdown.render(source);
 	expect(rendered).toBe('<div> <p><em>Bold text</em></p>\n </div>');
 });
+
+test('Check markdown is using the custom renderer; specifically that it adds target=_self attribute to internal links in HTML blocks', function() {
+	const source = '<div>[Has _self Attribute?](#p1)</div>';
+	const rendered = Markdown.render(source);
+	expect(rendered).toBe('<div> <p><a href="#p1" target="_self">Has _self Attribute?</a></p>\n </div>');
+});