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+++ b/testing/web-platform/tests/css/css-ruby/ruby-line-break-suppression-003.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<meta charset="UTF-8">
+<title>Test for ruby line break suppression</title>
+<link rel="author" title="Xidorn Quan" href="https://www.upsuper.org">
+<link rel="author" title="Mozilla" href="https://www.mozilla.org">
+<link rel="help" href="https://drafts.csswg.org/css-ruby-1/#box-fixup">
+<link rel="match" href="ruby-line-break-suppression-003-ref.html">
+<link rel="stylesheet" href="support/ruby-common.css">
+<style>
+  span { white-space: pre; }
+</style>
+<ruby><span>a
+b</span></ruby><br>
+<rbc><span>a
+b</span></rbc><br>
+<rtc><span>a
+b</span></rtc><br>
+<rb><span>a
+b</span></rb><br>
+<rt><span>a
+b</span></rt><br>