diff --git a/src/compiler/compile/render_dom/index.ts b/src/compiler/compile/render_dom/index.ts
index a56f3fb2b30e..8be14c6b54c0 100644
--- a/src/compiler/compile/render_dom/index.ts
+++ b/src/compiler/compile/render_dom/index.ts
@@ -399,7 +399,7 @@ export default function dom(
 			unknown_props_check = b`
 				const writable_props = [${writable_props.map(prop => x`'${prop.export_name}'`)}];
 				@_Object.keys($$props).forEach(key => {
-					if (!~writable_props.indexOf(key) && key.slice(0, 2) !== '$$') @_console.warn(\`<${component.tag}> was created with unknown prop '\${key}'\`);
+					if (!~writable_props.indexOf(key) && key.slice(0, 2) !== '$$' && key !== 'slot') @_console.warn(\`<${component.tag}> was created with unknown prop '\${key}'\`);
 				});
 			`;
 		}
diff --git a/test/js/samples/capture-inject-state/expected.js b/test/js/samples/capture-inject-state/expected.js
index 854e0b32652c..6485526bd4d5 100644
--- a/test/js/samples/capture-inject-state/expected.js
+++ b/test/js/samples/capture-inject-state/expected.js
@@ -116,7 +116,7 @@ function instance($$self, $$props, $$invalidate) {
 	const writable_props = ["prop", "alias"];
 
 	Object.keys($$props).forEach(key => {
-		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$" && key !== "slot") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$$set = $$props => {
diff --git a/test/js/samples/debug-empty/expected.js b/test/js/samples/debug-empty/expected.js
index f427f1bf4581..c18eb8699c19 100644
--- a/test/js/samples/debug-empty/expected.js
+++ b/test/js/samples/debug-empty/expected.js
@@ -75,7 +75,7 @@ function instance($$self, $$props, $$invalidate) {
 	const writable_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 (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$" && key !== "slot") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$$set = $$props => {
diff --git a/test/js/samples/debug-foo-bar-baz-things/expected.js b/test/js/samples/debug-foo-bar-baz-things/expected.js
index 7439b3310b3a..12a04b438b29 100644
--- a/test/js/samples/debug-foo-bar-baz-things/expected.js
+++ b/test/js/samples/debug-foo-bar-baz-things/expected.js
@@ -179,7 +179,7 @@ function instance($$self, $$props, $$invalidate) {
 	const writable_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 (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$" && key !== "slot") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$$set = $$props => {
diff --git a/test/js/samples/debug-foo/expected.js b/test/js/samples/debug-foo/expected.js
index d869a5cf9e84..029d52588393 100644
--- a/test/js/samples/debug-foo/expected.js
+++ b/test/js/samples/debug-foo/expected.js
@@ -171,7 +171,7 @@ function instance($$self, $$props, $$invalidate) {
 	const writable_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 (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$" && key !== "slot") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$$set = $$props => {
diff --git a/test/js/samples/debug-hoisted/expected.js b/test/js/samples/debug-hoisted/expected.js
index c6257ac90d5a..8dbd7184046b 100644
--- a/test/js/samples/debug-hoisted/expected.js
+++ b/test/js/samples/debug-hoisted/expected.js
@@ -56,7 +56,7 @@ function instance($$self, $$props, $$invalidate) {
 	const writable_props = [];
 
 	Object.keys($$props).forEach(key => {
-		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$" && key !== "slot") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$capture_state = () => ({ obj, kobzol });
diff --git a/test/js/samples/debug-no-dependencies/expected.js b/test/js/samples/debug-no-dependencies/expected.js
index 4d8d05d3aa6e..29e518d9b1d6 100644
--- a/test/js/samples/debug-no-dependencies/expected.js
+++ b/test/js/samples/debug-no-dependencies/expected.js
@@ -141,7 +141,7 @@ function instance($$self, $$props) {
 	const writable_props = [];
 
 	Object.keys($$props).forEach(key => {
-		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$" && key !== "slot") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	return [];
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 8c7f8bb1cff8..a981d88dca5e 100644
--- a/test/js/samples/dev-warning-missing-data-computed/expected.js
+++ b/test/js/samples/dev-warning-missing-data-computed/expected.js
@@ -72,7 +72,7 @@ function instance($$self, $$props, $$invalidate) {
 	const writable_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 (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$" && key !== "slot") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$$set = $$props => {
diff --git a/test/js/samples/loop-protect/expected.js b/test/js/samples/loop-protect/expected.js
index 1042b20823b8..26721d6be6a8 100644
--- a/test/js/samples/loop-protect/expected.js
+++ b/test/js/samples/loop-protect/expected.js
@@ -110,7 +110,7 @@ function instance($$self, $$props, $$invalidate) {
 	const writable_props = [];
 
 	Object.keys($$props).forEach(key => {
-		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$") console_1.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$" && key !== "slot") console_1.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	function div_binding($$value) {