diff --git a/packages/protocol/src/browser/client.ts b/packages/protocol/src/browser/client.ts
index 941183845..d436057ae 100644
--- a/packages/protocol/src/browser/client.ts
+++ b/packages/protocol/src/browser/client.ts
@@ -48,6 +48,10 @@ export class Client {
 		});
 	}
 
+	public dispose(): void {
+		this.connection.close();
+	}
+
 	public get initData(): Promise<InitData> {
 		return this.initDataPromise;
 	}
diff --git a/packages/protocol/test/evaluate.test.ts b/packages/protocol/test/evaluate.test.ts
index 240b4992d..db3fe67de 100644
--- a/packages/protocol/test/evaluate.test.ts
+++ b/packages/protocol/test/evaluate.test.ts
@@ -4,7 +4,7 @@ describe("Evaluate", () => {
 	const client = createClient();
 
 	it("should transfer string", async () => {
-		const value = await client.evaluate(function () {
+		const value = await client.evaluate(() => {
 			return "hi";
 		});
 
@@ -58,20 +58,27 @@ describe("Evaluate", () => {
 
 	it("should do active process", (done) => {
 		const runner = client.run((ae) => {
-			ae.on("1", () => {
-				ae.emit("2");
-				ae.on("3", () => {
-					ae.emit("close");
-				});
+			ae.on("first", () => {
+				ae.emit("first:response");
+				ae.on("second", () => ae.emit("second:response"));
 			});
 
+			const disposeCallbacks = <Array<() => void>>[];
+			const dispose = (): void => {
+				disposeCallbacks.forEach((cb) => cb());
+				ae.emit("disposed");
+			};
+
 			return {
-				onDidDispose: (): void => undefined,
-				dispose: (): void => undefined,
+				onDidDispose: (cb: () => void): number => disposeCallbacks.push(cb),
+				dispose,
 			};
 		});
-		runner.emit("1");
-		runner.on("2", () => runner.emit("3"));
-		runner.on("close", () => done());
+
+		runner.emit("first");
+		runner.on("first:response", () => runner.emit("second"));
+		runner.on("second:response", () => client.dispose());
+
+		runner.on("disposed", () => done());
 	});
 });
diff --git a/packages/protocol/test/helpers.ts b/packages/protocol/test/helpers.ts
index 86a6fc911..828cf9c56 100644
--- a/packages/protocol/test/helpers.ts
+++ b/packages/protocol/test/helpers.ts
@@ -5,11 +5,12 @@ import { Server, ServerOptions } from "../src/node/server";
 export const createClient = (serverOptions?: ServerOptions): Client => {
 	const s2c = new Emitter<Uint8Array | Buffer>();
 	const c2s = new Emitter<Uint8Array | Buffer>();
+	const closeCallbacks = <Array<() => void>>[];
 
-	// tslint:disable-next-line
+	// tslint:disable-next-line no-unused-expression
 	new Server({
-		close: (): void => undefined,
-		onClose: (): void => undefined,
+		close: (): void => closeCallbacks.forEach((cb) => cb()),
+		onClose: (cb: () => void): number => closeCallbacks.push(cb),
 		onMessage: (cb): void => {
 			c2s.event((d) => cb(d));
 		},
@@ -17,8 +18,8 @@ export const createClient = (serverOptions?: ServerOptions): Client => {
 	}, serverOptions);
 
 	const client = new Client({
-		close: (): void => undefined,
-		onClose: (): void => undefined,
+		close: (): void => closeCallbacks.forEach((cb) => cb()),
+		onClose: (cb: () => void): number => closeCallbacks.push(cb),
 		onMessage: (cb): void => {
 			s2c.event((d) => cb(d));
 		},
diff --git a/packages/protocol/test/server.test.ts b/packages/protocol/test/server.test.ts
index a9ac29126..bc11bbb2f 100644
--- a/packages/protocol/test/server.test.ts
+++ b/packages/protocol/test/server.test.ts
@@ -3,15 +3,18 @@ import { createClient } from "./helpers";
 describe("Server", () => {
 	const dataDirectory = "/tmp/example";
 	const workingDirectory = "/working/dir";
+	const builtInExtensionsDirectory = "/tmp/example";
 	const client = createClient({
 		dataDirectory,
 		workingDirectory,
+		builtInExtensionsDirectory,
 	});
 
 	it("should get init msg", (done) => {
 		client.initData.then((data) => {
 			expect(data.dataDirectory).toEqual(dataDirectory);
 			expect(data.workingDirectory).toEqual(workingDirectory);
+			expect(data.builtInExtensionsDirectory).toEqual(builtInExtensionsDirectory);
 			done();
 		});
 	});