diff --git a/test/twin-svg11-ref.png b/test/twin-svg11-ref.png
new file mode 100644
index 000000000..5b7d67d42
Binary files /dev/null and b/test/twin-svg11-ref.png differ
diff --git a/test/twin-svg12-ref.png b/test/twin-svg12-ref.png
new file mode 100644
index 000000000..5b7d67d42
Binary files /dev/null and b/test/twin-svg12-ref.png differ