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+<!DOCTYPE html>
+<title>
+Transform animation creates a stacking context even though it has only
+'transform:none' keyframes and with a style which prevents performning
+the animation on the compositor.
+</title>
+<style>
+span {
+ height: 100px;
+ width: 100px;
+ position: fixed;
+ background: green;
+ top: 50px;
+}
+@keyframes TransformNone {
+ from, to { transform: none }
+}
+#test {
+ width: 100px; height: 100px;
+ background: blue;
+ transform-style: preserve-3d;
+ animation: TransformNone 100s infinite;
+}
+</style>
+<span></span>
+<div id="test"></div>