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+<!doctype html>
+<html class="reftest-wait">
+<title>Moving the caret in an editor jumps over non-editable nodes.</title>
+<script src="/tests/SimpleTest/EventUtils.js"></script>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<style>
+ * { outline: none }
+
+ div {
+  border: 1px solid red;
+  margin: 5px;
+  padding: 2px;
+ }
+</style>
+<div contenteditable="true">
+  I am div number one
+  <div contenteditable="false">X X X</div>
+  However I am editable
+</div>
+<script>
+SimpleTest.waitForFocus(function() {
+  const editable = document.querySelector('div[contenteditable="true"]');
+  editable.focus();
+  // 5 words in the first line, plus the non-editable node.
+  for (let i = 0; i < "I am div number one".length + 2; ++i)
+    synthesizeKey("KEY_ArrowRight");
+  setTimeout(() => document.documentElement.removeAttribute("class"), 0);
+});
+</script>
+</html>