diff --git a/test/runtime/samples/dev-warning-unknown-props-2/Foo.svelte b/test/runtime/samples/dev-warning-unknown-props-2/Foo.svelte
new file mode 100644
index 0000000000..bc56c4d894
--- /dev/null
+++ b/test/runtime/samples/dev-warning-unknown-props-2/Foo.svelte
@@ -0,0 +1 @@
+Foo
diff --git a/test/runtime/samples/dev-warning-unknown-props-2/_config.js b/test/runtime/samples/dev-warning-unknown-props-2/_config.js
new file mode 100644
index 0000000000..9bff4a2a74
--- /dev/null
+++ b/test/runtime/samples/dev-warning-unknown-props-2/_config.js
@@ -0,0 +1,9 @@
+export default {
+	compileOptions: {
+		dev: true
+	},
+
+	warnings: [
+		`<Foo> was created with unknown prop 'fo'`
+	]
+};
diff --git a/test/runtime/samples/dev-warning-unknown-props-2/main.svelte b/test/runtime/samples/dev-warning-unknown-props-2/main.svelte
new file mode 100644
index 0000000000..1566cf3e41
--- /dev/null
+++ b/test/runtime/samples/dev-warning-unknown-props-2/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Foo from './Foo.svelte';
+</script>
+
+<Foo fo="sho"/>