diff --git a/test/freenet/client/filter/ContentFilterTest.java b/test/freenet/client/filter/ContentFilterTest.java
index e25e5eb50a..7252a1c6f7 100644
--- a/test/freenet/client/filter/ContentFilterTest.java
+++ b/test/freenet/client/filter/ContentFilterTest.java
@@ -108,6 +108,8 @@ public class ContentFilterTest {
 
 	private static final String SPAN_WITH_STYLE = "<span style=\"font-family: verdana, sans-serif; color: red;\">";
 
+	private static final String HTML5_TAGS = "<article><details><summary>TLDR</summary><center>Too Long Di<wbr />dn’t Read</center></details></article>";
+
 	private static final String BASE_HREF = "<base href=\"/"+BASE_KEY+"\">";
 	private static final String BAD_BASE_HREF = "<base href=\"/\">";
 	private static final String BAD_BASE_HREF2 = "<base href=\"//www.google.com\">";
@@ -178,6 +180,7 @@ public void testHTMLFilter() throws Exception {
 		assertEquals(CSS_SPEC_EXAMPLE1, HTMLFilter(CSS_SPEC_EXAMPLE1));
 
 		assertEquals(SPAN_WITH_STYLE, HTMLFilter(SPAN_WITH_STYLE));
+		assertEquals(HTML5_TAGS, HTMLFilter(HTML5_TAGS));
 
 		assertEquals(BASE_HREF, HTMLFilter(BASE_HREF));
 		assertEquals(DELETED_BASE_HREF, HTMLFilter(BAD_BASE_HREF));