diff --git a/packages/next/server/image-optimizer.ts b/packages/next/server/image-optimizer.ts
index 155f994ed496..c6c2267cc322 100644
--- a/packages/next/server/image-optimizer.ts
+++ b/packages/next/server/image-optimizer.ts
@@ -511,7 +511,7 @@ export async function imageOptimizer(
       }
     } else {
       throw new ImageError(
-        500,
+        400,
         'Unable to optimize image and unable to fallback to upstream image'
       )
     }
diff --git a/test/integration/image-optimizer/test/util.js b/test/integration/image-optimizer/test/util.js
index e8a7094fd6c8..a972b447202c 100644
--- a/test/integration/image-optimizer/test/util.js
+++ b/test/integration/image-optimizer/test/util.js
@@ -766,7 +766,7 @@ export function runTests(ctx) {
     const query = { url, w: ctx.w, q: 39 }
     const opts = { headers: { accept: 'image/webp' } }
     const res = await fetchViaHTTP(ctx.appPort, '/_next/image', query, opts)
-    expect(res.status).toBe(500)
+    expect(res.status).toBe(400)
     expect(await res.text()).toBe(
       `Unable to optimize image and unable to fallback to upstream image`
     )