1 files changed, 40 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-paint-api/background-image-alpha-ref.html b/testing/web-platform/tests/css/css-paint-api/background-image-alpha-ref.html
new file mode 100644
index 0000000000..532b1bd7e3
--- /dev/null
+++ b/testing/web-platform/tests/css/css-paint-api/background-image-alpha-ref.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html>
+<head>
+<style>
+#background {
+  background-color: yellow;
+  display: inline-block;
+}
+
+.container {
+  font-size: 0px;
+}
+</style>
+</head>
+<body>
+
+<div id="background">
+  <div class="container">
+    <canvas id ="opaque" width="100" height="100"></canvas>
+  </div>
+  <div class="container">
+    <canvas id ="nonopaque" width="100" height="100"></canvas>
+  </div>
+</div>
+
+<script>
+function drawCanvas(canvasID, hasAlpha) {
+  var canvas = document.getElementById(canvasID);
+  var context = canvas.getContext("2d", {alpha: hasAlpha});
+  context.clearRect(0, 0, canvas.width, canvas.height);
+  context.fillStyle = 'blue';
+  context.fillRect(20, 20, 60, 60);
+};
+
+drawCanvas('opaque', false);
+drawCanvas('nonopaque', true);
+
+</script>
+</body>
+</html>