diff --git a/tests/generate-references.sh b/tests/generate-references.sh
index 053f472..7032b04 100755
--- a/tests/generate-references.sh
+++ b/tests/generate-references.sh
@@ -191,6 +191,7 @@ capture_effect "incinerate"
 capture_effect "pixelate"
 capture_effect "pixel-wheel"
 capture_effect "pixel-wipe"
+capture_effect "portal"
 capture_effect "tv"
 capture_effect "wisps"