diff --git a/tests/serving-functions-go.test.js b/tests/serving-functions-go.test.js
index 2d73dabd98b..2689a6d5ed0 100644
--- a/tests/serving-functions-go.test.js
+++ b/tests/serving-functions-go.test.js
@@ -8,7 +8,7 @@ const { withSiteBuilder } = require('./utils/site-builder')
 
 const WAIT_INTERVAL = 1800
 const WAIT_TIMEOUT = 30000
-const WAIT_WRITE = 1000
+const WAIT_WRITE = 3000
 
 test('Updates a Go function when a file is modified', async (t) => {
   const goSource = `
diff --git a/tests/serving-functions.test.js b/tests/serving-functions.test.js
index c646ad247b2..fb44cbf306c 100644
--- a/tests/serving-functions.test.js
+++ b/tests/serving-functions.test.js
@@ -14,7 +14,7 @@ const testName = (title, args) => (args.length <= 0 ? title : `${title} - ${args
 
 const WAIT_INTERVAL = 1800
 const WAIT_TIMEOUT = 30000
-const WAIT_WRITE = 1000
+const WAIT_WRITE = 3000
 
 const gotCatch404 = async (url, options) => {
   try {