diff --git a/test/use-swr.test.tsx b/test/use-swr.test.tsx
index 38cb74710..6071d2373 100644
--- a/test/use-swr.test.tsx
+++ b/test/use-swr.test.tsx
@@ -1412,9 +1412,9 @@ describe('useSWR - local mutation', () => {
     )
   })
 
-  it('should support async mutation', async () => {
+  it('should support async mutation with promise', async () => {
     function Page() {
-      const { data } = useSWR('mutate-1', () => 0, {
+      const { data } = useSWR('mutate-promise', () => 0, {
         dedupingInterval: 0
       })
       return <div>data: {data}</div>
@@ -1428,7 +1428,7 @@ describe('useSWR - local mutation', () => {
     await act(() => {
       // mutate and revalidate
       return mutate(
-        'mutate-1',
+        'mutate-promise',
         new Promise(res => setTimeout(() => res(999), 100)),
         false
       )
@@ -1437,6 +1437,31 @@ describe('useSWR - local mutation', () => {
     expect(container.textContent).toMatchInlineSnapshot(`"data: 999"`)
   })
 
+  it('should support async mutation with async function', async () => {
+    function Page() {
+      const { data } = useSWR('mutate-async-fn', () => 0, {
+        dedupingInterval: 0
+      })
+      return <div>data: {data}</div>
+    }
+    const { container } = render(<Page />)
+
+    // hydration
+    expect(container.textContent).toMatchInlineSnapshot(`"data: "`)
+    await waitForDomChange({ container }) // mount
+    expect(container.textContent).toMatchInlineSnapshot(`"data: 0"`)
+    await act(() => {
+      // mutate and revalidate
+      return mutate(
+        'mutate-async-fn',
+        async () => new Promise(res => setTimeout(() => res(999), 100)),
+        false
+      )
+    })
+    await act(() => new Promise(res => setTimeout(res, 110)))
+    expect(container.textContent).toMatchInlineSnapshot(`"data: 999"`)
+  })
+
   it('should trigger on mutation without data', async () => {
     let value = 0