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diff --git a/gfx/wr/wrench/reftests/clip/clipped-occlusion.yaml b/gfx/wr/wrench/reftests/clip/clipped-occlusion.yaml
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+++ b/gfx/wr/wrench/reftests/clip/clipped-occlusion.yaml
@@ -0,0 +1,23 @@
+# This is a regression test for https://bugzilla.mozilla.org/show_bug.cgi?id=1594567
+# The single clip node from the primitive inside the scroll frame will be promoted
+# to a 'shared clip' in the picture cache for the scroll frame. Ensure that this clip
+# (zero sized in this test) is included in the tile occlusion culling.
+---
+root:
+ items:
+ -
+ type: rect
+ bounds: [0, 0, 500, 500]
+ color: red
+ -
+ type: scroll-frame
+ content-size: [1000, 10000]
+ bounds: [0, -5000, 1000, 10000]
+ items:
+ - type: clip
+ bounds: [0, 0, 0, 0]
+ items:
+ -
+ bounds: [0, -5000, 1000, 10000]
+ type: rect
+ color: green