diff --git a/gfx/tests/crashtests/563740-1.html b/gfx/tests/crashtests/563740-1.html
new file mode 100644
index 000000000000..8873cfa3ade8
--- /dev/null
+++ b/gfx/tests/crashtests/563740-1.html
@@ -0,0 +1,2 @@
+鎅
+
diff --git a/gfx/tests/crashtests/crashtests.list b/gfx/tests/crashtests/crashtests.list
index 79df5807b9ea..c208d2752e11 100644
--- a/gfx/tests/crashtests/crashtests.list
+++ b/gfx/tests/crashtests/crashtests.list
@@ -84,6 +84,7 @@ load 532726-1.html
load 538065-1.html
load 546870-1.html
load 557348-1.html
+load 563740-1.html
load 580100-1.html
load 580212-1.html
load 580233-1.html