diff --git a/src/lib/functions/local-proxy.js b/src/lib/functions/local-proxy.js
index 5c49548f68b..ad25b595497 100644
--- a/src/lib/functions/local-proxy.js
+++ b/src/lib/functions/local-proxy.js
@@ -1,3 +1,5 @@
+const { stdout } = require('process')
+
 const { getBinaryPath: getFunctionsProxyPath } = require('@netlify/local-functions-proxy')
 
 const execa = require('../../utils/execa')
@@ -34,8 +36,11 @@ const runFunctionsProxy = ({ binaryPath, context, directory, event, name, timeou
     '--timeout',
     `${timeout}s`,
   ]
+  const proxyProcess = execa(functionsProxyPath, parameters)
+
+  proxyProcess.stderr.pipe(stdout)
 
-  return execa(functionsProxyPath, parameters)
+  return proxyProcess
 }
 
 module.exports = { runFunctionsProxy }
diff --git a/tests/serving-functions-go.test.js b/tests/serving-functions-go.test.js
index a87a5c8b33a..3ab462d979c 100644
--- a/tests/serving-functions-go.test.js
+++ b/tests/serving-functions-go.test.js
@@ -19,7 +19,7 @@ test('Updates a Go function when a file is modified', async (t) => {
 
     let proxyCallCount = 0
 
-    module.exports = async (...args) => {
+    const handler = (...args) => {
       if (args[0] === 'go') {
         const binaryPath = args[1][2]
 
@@ -45,6 +45,11 @@ test('Updates a Go function when a file is modified', async (t) => {
         }
       }
     }
+
+    module.exports = (...args) => ({
+      ...handler(...args) || {},
+      stderr: { pipe: () => {} }
+    })
   `)
 
   await withSiteBuilder('go-function-update', async (builder) => {
diff --git a/tests/serving-functions-rust.test.js b/tests/serving-functions-rust.test.js
index 7e90221d89c..900394b9b75 100644
--- a/tests/serving-functions-rust.test.js
+++ b/tests/serving-functions-rust.test.js
@@ -39,7 +39,7 @@ test('Updates a Rust function when a file is modified', async (t) => {
     const [execaMock, removeExecaMock] = await createExecaMock(`
       let proxyCallCount = 0
 
-      module.exports = async (...args) => {
+      const handler = (...args) => {
         if (args[0] === 'cargo') {
           return {
             stderr: '',
@@ -61,6 +61,11 @@ test('Updates a Rust function when a file is modified', async (t) => {
           }
         }
       }
+
+      module.exports = (...args) => ({
+        ...handler(...args) || {},
+        stderr: { pipe: () => {} }
+      })
     `)
 
     await withDevServer(