diff --git a/test/runtime/samples/spread-element-class/_config.js b/test/runtime/samples/spread-element-class/_config.js
new file mode 100644
index 0000000000..7fc3d49012
--- /dev/null
+++ b/test/runtime/samples/spread-element-class/_config.js
@@ -0,0 +1,7 @@
+export default {
+	html: `<div class='foo bar'>hello</div>`,
+	test({ assert, component, target }) {
+		component.blah = 'goodbye';
+		assert.htmlEqual(target.innerHTML, `<div class='foo bar'>goodbye</div>`);
+	}
+};
diff --git a/test/runtime/samples/spread-element-class/main.svelte b/test/runtime/samples/spread-element-class/main.svelte
new file mode 100644
index 0000000000..a678659013
--- /dev/null
+++ b/test/runtime/samples/spread-element-class/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	export let blah = 'hello';
+</script>
+
+<div class='foo' class:bar={true} {...{}}>{blah}</div>