diff --git a/test/js/samples/debug-empty/expected.js b/test/js/samples/debug-empty/expected.js
index b545823c57..f3c9f5c271 100644
--- a/test/js/samples/debug-empty/expected.js
+++ b/test/js/samples/debug-empty/expected.js
@@ -69,10 +69,10 @@ function create_fragment(ctx) {
 
 function instance($$self, $$props, $$invalidate) {
 	let { name } = $$props;
-	const writable_props = ["name"];
+	const props = ["name"];
 
 	Object.keys($$props).forEach(key => {
-		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!~props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$set = $$props => {
@@ -119,4 +119,4 @@ class Component extends SvelteComponentDev {
 	}
 }
 
-export default Component;
\ No newline at end of file
+export default Component;
diff --git a/test/js/samples/debug-foo-bar-baz-things/expected.js b/test/js/samples/debug-foo-bar-baz-things/expected.js
index 448fc82176..4b27196dba 100644
--- a/test/js/samples/debug-foo-bar-baz-things/expected.js
+++ b/test/js/samples/debug-foo-bar-baz-things/expected.js
@@ -164,10 +164,10 @@ function instance($$self, $$props, $$invalidate) {
 	let { foo } = $$props;
 	let { bar } = $$props;
 	let { baz } = $$props;
-	const writable_props = ["things", "foo", "bar", "baz"];
+	const props = ["things", "foo", "bar", "baz"];
 
 	Object.keys($$props).forEach(key => {
-		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!~props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$set = $$props => {
@@ -256,4 +256,4 @@ class Component extends SvelteComponentDev {
 	}
 }
 
-export default Component;
\ No newline at end of file
+export default Component;
diff --git a/test/js/samples/debug-foo/expected.js b/test/js/samples/debug-foo/expected.js
index 8abfd1bae1..effce4dda2 100644
--- a/test/js/samples/debug-foo/expected.js
+++ b/test/js/samples/debug-foo/expected.js
@@ -162,10 +162,10 @@ function create_fragment(ctx) {
 function instance($$self, $$props, $$invalidate) {
 	let { things } = $$props;
 	let { foo } = $$props;
-	const writable_props = ["things", "foo"];
+	const props = ["things", "foo"];
 
 	Object.keys($$props).forEach(key => {
-		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!~props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$set = $$props => {
@@ -226,4 +226,4 @@ class Component extends SvelteComponentDev {
 	}
 }
 
-export default Component;
\ No newline at end of file
+export default Component;
diff --git a/test/js/samples/dev-warning-missing-data-computed/expected.js b/test/js/samples/dev-warning-missing-data-computed/expected.js
index 5da2b4aead..0acd37dca9 100644
--- a/test/js/samples/dev-warning-missing-data-computed/expected.js
+++ b/test/js/samples/dev-warning-missing-data-computed/expected.js
@@ -66,10 +66,10 @@ function create_fragment(ctx) {
 function instance($$self, $$props, $$invalidate) {
 	let { foo } = $$props;
 	let bar;
-	const writable_props = ["foo"];
+	const props = ["foo"];
 
 	Object.keys($$props).forEach(key => {
-		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!~props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$set = $$props => {
@@ -123,4 +123,4 @@ class Component extends SvelteComponentDev {
 	}
 }
 
-export default Component;
\ No newline at end of file
+export default Component;
diff --git a/test/runtime/samples/dev-warning-unknown-props-uses-readable/Foo.svelte b/test/runtime/samples/dev-warning-unknown-props-uses-readable/Foo.svelte
index 14509b2fa1..a4b044124c 100644
--- a/test/runtime/samples/dev-warning-unknown-props-uses-readable/Foo.svelte
+++ b/test/runtime/samples/dev-warning-unknown-props-uses-readable/Foo.svelte
@@ -1,5 +1,5 @@
 <script>
-	export const foo = undefined;
+	export function foo() {}
 </script>
 
 <div>{foo}</div>
diff --git a/test/runtime/samples/dev-warning-unknown-props-uses-readable/main.svelte b/test/runtime/samples/dev-warning-unknown-props-uses-readable/main.svelte
index dbefea7b4d..99b8c22505 100644
--- a/test/runtime/samples/dev-warning-unknown-props-uses-readable/main.svelte
+++ b/test/runtime/samples/dev-warning-unknown-props-uses-readable/main.svelte
@@ -2,4 +2,4 @@
 	import Foo from './Foo.svelte';
 </script>
 
-<Foo foo="sho"/>
+<Foo foo={false}/>