diff --git a/mozilla/layout/reftests/bugs/403733-1-ref.html b/mozilla/layout/reftests/bugs/403733-1-ref.html
new file mode 100644
index 00000000000..85b0380361d
--- /dev/null
+++ b/mozilla/layout/reftests/bugs/403733-1-ref.html
@@ -0,0 +1,15 @@
+
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diff --git a/mozilla/layout/reftests/bugs/403733-1.html b/mozilla/layout/reftests/bugs/403733-1.html
new file mode 100644
index 00000000000..d8b4ad15f95
--- /dev/null
+++ b/mozilla/layout/reftests/bugs/403733-1.html
@@ -0,0 +1,15 @@
+
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diff --git a/mozilla/layout/reftests/bugs/reftest.list b/mozilla/layout/reftests/bugs/reftest.list
index 1a6f5de1446..ac22edf85b9 100644
--- a/mozilla/layout/reftests/bugs/reftest.list
+++ b/mozilla/layout/reftests/bugs/reftest.list
@@ -447,3 +447,4 @@ fails == 393655-2.html 393655-2-ref.html # Remove 'fails' when 393655 lands
== 403656-3.html 403656-3-ref.html
== 403656-4.html 403656-4-ref.html
== 403656-5.html 403656-5-ref.html
+== 403733-1.html 403733-1-ref.html