diff --git a/karma.config.cjs b/karma.config.cjs
index e17b8b0edd..ac212ff9d5 100644
--- a/karma.config.cjs
+++ b/karma.config.cjs
@@ -121,7 +121,7 @@ module.exports = (config) => {
     customLaunchers: {
       ChromeHeadlessNoSandbox: {
         base: 'ChromeHeadless',
-        flags: ['--no-sandbox', '--disable-setuid-sandbox'],
+        flags: ['--no-sandbox', '--disable-setuid-sandbox', '--window-size=1024x768'],
       },
       ChromeNoSS: {
         base: 'Chrome',