diff --git a/test/js/samples/debug-empty/expected.js b/test/js/samples/debug-empty/expected.js
index c82cbeddd3..6f07993590 100644
--- a/test/js/samples/debug-empty/expected.js
+++ b/test/js/samples/debug-empty/expected.js
@@ -67,7 +67,7 @@ function instance($$self, $$props, $$invalidate) {
 
 	const writable_props = ['name'];
 	Object.keys($$props).forEach(key => {
-		if (!writable_props.includes(key)) console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!writable_props.includes(key) && !key.startsWith('$$')) console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$set = $$props => {
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 3e1571b890..eea35d5ba7 100644
--- a/test/js/samples/debug-foo-bar-baz-things/expected.js
+++ b/test/js/samples/debug-foo-bar-baz-things/expected.js
@@ -153,7 +153,7 @@ function instance($$self, $$props, $$invalidate) {
 
 	const writable_props = ['things', 'foo', 'bar', 'baz'];
 	Object.keys($$props).forEach(key => {
-		if (!writable_props.includes(key)) console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!writable_props.includes(key) && !key.startsWith('$$')) console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$set = $$props => {
diff --git a/test/js/samples/debug-foo/expected.js b/test/js/samples/debug-foo/expected.js
index 1af0fcaebe..5b931d9464 100644
--- a/test/js/samples/debug-foo/expected.js
+++ b/test/js/samples/debug-foo/expected.js
@@ -153,7 +153,7 @@ function instance($$self, $$props, $$invalidate) {
 
 	const writable_props = ['things', 'foo'];
 	Object.keys($$props).forEach(key => {
-		if (!writable_props.includes(key)) console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!writable_props.includes(key) && !key.startsWith('$$')) console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$set = $$props => {
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 0c193934c0..5c4b2ece1b 100644
--- a/test/js/samples/dev-warning-missing-data-computed/expected.js
+++ b/test/js/samples/dev-warning-missing-data-computed/expected.js
@@ -67,7 +67,7 @@ function instance($$self, $$props, $$invalidate) {
 
 	const writable_props = ['foo'];
 	Object.keys($$props).forEach(key => {
-		if (!writable_props.includes(key)) console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!writable_props.includes(key) && !key.startsWith('$$')) console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$set = $$props => {