diff --git a/layout/base/crashtests/1143535.html b/layout/base/crashtests/1143535.html
new file mode 100644
index 000000000000..774984c719bd
--- /dev/null
+++ b/layout/base/crashtests/1143535.html
@@ -0,0 +1,6 @@
+<style>
+  body::before {
+    display: ruby;
+    content: "  ";
+  }
+</style>
diff --git a/layout/base/crashtests/crashtests.list b/layout/base/crashtests/crashtests.list
index 6ceaaa94a03f..84b98896b47b 100644
--- a/layout/base/crashtests/crashtests.list
+++ b/layout/base/crashtests/crashtests.list
@@ -466,6 +466,7 @@ load 1107508-1.html
 load 1116104.html
 load 1127198-1.html
 load 1140198.html
+load 1143535.html
 pref(layout.css.grid.enabled,true) load 1156588.html
 load 1162813.xul
 load 1163583.html