diff --git a/build.js b/build.js
index 2b3096a..0390fa7 100755
--- a/build.js
+++ b/build.js
@@ -7,6 +7,7 @@ const tailwindcss = require('tailwindcss')
 const autoprefixer = require('autoprefixer')
 
 const isProduction = process.argv.includes('--production')
+const isCI = process.env.CI === 'true'
 const watch = process.argv.includes('--watch')
 
 const copyChromeManifestPlugin = {
@@ -69,6 +70,7 @@ const config = {
   define: {
     ISINSTOCK_URL: isProduction ? '"https://isinstock.com"' : '"http://localhost:3000"',
     CHROME_EXTENSION_ID: '"bnglflgcpflggbpbcbpgeaknekceeojd"',
+    CI: isCI ? 'true' : 'false',
   },
   drop: isProduction ? ['console'] : [],
   loader: {
diff --git a/src/@types/global.d.ts b/src/@types/global.d.ts
index bbea4a2..5d7f91c 100644
--- a/src/@types/global.d.ts
+++ b/src/@types/global.d.ts
@@ -1,5 +1,6 @@
 declare const ISINSTOCK_URL: string
 declare const CHROME_EXTENSION_ID: string
+declare const CI: boolean
 
 declare module '*.css' {
   const content: string
diff --git a/src/background.ts b/src/background.ts
index ec23120..b597691 100644
--- a/src/background.ts
+++ b/src/background.ts
@@ -30,6 +30,11 @@ browser.tabs.onUpdated.addListener(
 )
 
 browser.runtime.onStartup.addListener(async () => {
+  // onStartup cannot be tested with puppeteer so we skip it
+  if (CI) {
+    return
+  }
+
   try {
     const token = await getBrowserExtensionInstallToken()
     if (token !== '') {
@@ -46,6 +51,11 @@ browser.runtime.onStartup.addListener(async () => {
 
 // Register the install
 browser.runtime.onInstalled.addListener(async ({reason}) => {
+  // onInstalled cannot be tested with puppeteer so we skip it
+  if (CI) {
+    return
+  }
+
   try {
     const existingToken = await getBrowserExtensionInstallToken()
     if (existingToken !== '') {