2 files changed, 38 insertions, 0 deletions
diff --git a/tests/wpt/web-platform-tests/css/css-overflow/overflow-ellipsis-dynamic-001.html b/tests/wpt/web-platform-tests/css/css-overflow/overflow-ellipsis-dynamic-001.html
new file mode 100644
index 00000000000..2a9edba9308
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-overflow/overflow-ellipsis-dynamic-001.html
@@ -0,0 +1,26 @@
+<!doctype html>
+<html class="reftest-wait">
+<title>CSS Overflow Test: text-overflow: ellipsis after dynamic test change</title>
+<link rel="help" href="https://drafts.csswg.org/css-overflow-3/#text-overflow">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1615811">
+<link rel="author" href="mailto:emilio@crisal.io" name="Emilio Cobos Álvarez">
+<link rel="author" href="https://mozilla.org" name="Mozilla">
+<link rel="match" href="reference/overflow-ellipsis-dynamic-001-ref.html">
+<style>
+p {
+  width: 40ch;
+  font: 16px/1 monospace;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  overflow: hidden;
+}
+</style>
+<p>longtext longtext longtext longtext longtext longtext longtext longtext</p>
+<script>
+onload = function() {
+  requestAnimationFrame(() => requestAnimationFrame(() => {
+    document.querySelector("p").firstChild.nodeValue = "short";
+    document.documentElement.className = "";
+  }));
+}
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-overflow/reference/overflow-ellipsis-dynamic-001-ref.html b/tests/wpt/web-platform-tests/css/css-overflow/reference/overflow-ellipsis-dynamic-001-ref.html
new file mode 100644
index 00000000000..85f8c50a8d6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-overflow/reference/overflow-ellipsis-dynamic-001-ref.html
@@ -0,0 +1,12 @@
+<!doctype html>
+<title>CSS test reference</title>
+<style>
+p {
+  width: 40ch;
+  font: 16px/1 monospace;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  overflow: hidden;
+}
+</style>
+<p>short<p>