diff --git a/test/README b/test/README
index 8648b3041..ee57e9db0 100644
--- a/test/README
+++ b/test/README
@@ -236,6 +236,7 @@ https://bugs.freedesktop.org/show_bug.cgi?id=12144
 --------------------------------------------------
 fill-alpha-pattern
 gradient-alpha
+gradient-constant-alpha
 linear-gradient
 trap-clip
 linear-gradient
diff --git a/test/gradient-constant-alpha-pdf-argb32-ref.png b/test/gradient-constant-alpha-pdf-argb32-ref.png
new file mode 100644
index 000000000..056fcb2df
Binary files /dev/null and b/test/gradient-constant-alpha-pdf-argb32-ref.png differ
diff --git a/test/gradient-constant-alpha-pdf-rgb24-ref.png b/test/gradient-constant-alpha-pdf-rgb24-ref.png
new file mode 100644
index 000000000..60c02630a
Binary files /dev/null and b/test/gradient-constant-alpha-pdf-rgb24-ref.png differ