diff --git a/__tests__/index.test.ts b/__tests__/index.test.ts
index 98e4eb0..227970c 100644
--- a/__tests__/index.test.ts
+++ b/__tests__/index.test.ts
@@ -673,7 +673,7 @@ describe("basic rpc", () => {
     expect(await stub.jsonify({x: 123, $remove$toJSON: () => "bad"})).toBe('{"x":123}');
   });
 
-  it("supports passing async functinos", async () => {
+  it("supports passing async functions", async () => {
     await using harness = new TestHarness(new TestTarget());
 
     async function square(i: number) {
diff --git a/__tests__/test-util.ts b/__tests__/test-util.ts
index 50e72cb..1559230 100644
--- a/__tests__/test-util.ts
+++ b/__tests__/test-util.ts
@@ -35,7 +35,7 @@ export class TestTarget extends RpcTarget {
     return { result: self.square(i) };
   }
 
-  async callFunction(func: RpcStub<(i: number) => number>, i: number) {
+  async callFunction(func: RpcStub<(i: number) => Promise<number>>, i: number) {
     return { result: await func(i) };
   }