diff --git a/test/function/bundle-transformer-async/_config.js b/test/function/bundle-transformer-async/_config.js
new file mode 100644
index 00000000000..66873b6b257
--- /dev/null
+++ b/test/function/bundle-transformer-async/_config.js
@@ -0,0 +1,22 @@
+module.exports = {
+	description: 'bundle transformers can be asynchronous',
+	options: {
+		plugins: [
+			{
+				transformBundle: function ( code ) {
+					return Promise.resolve( code.replace( 'x', 1 ) );
+				}
+			},
+			{
+				transformBundle: function ( code ) {
+					return code.replace( '1', 2 );
+				}
+			},
+			{
+				transformBundle: function ( code ) {
+					return Promise.resolve( code.replace( '2', 3 ) );
+				}
+			}
+		]
+	}
+};
diff --git a/test/function/bundle-transformer-async/main.js b/test/function/bundle-transformer-async/main.js
new file mode 100644
index 00000000000..a09d9954e25
--- /dev/null
+++ b/test/function/bundle-transformer-async/main.js
@@ -0,0 +1 @@
+assert.equal( x, 3 );