diff --git a/ui/packages/consul-ui/testem.js b/ui/packages/consul-ui/testem.js
index 3a84839e85..d081beabd6 100644
--- a/ui/packages/consul-ui/testem.js
+++ b/ui/packages/consul-ui/testem.js
@@ -2,7 +2,8 @@ module.exports = {
   test_page: 'tests/index.html?hidepassed',
   disable_watching: true,
   launch_in_ci: ['Chrome'],
-  launch_in_dev: ['Chrome'],
+  launch_in_dev: ['Chrome', 'Firefox', 'Safari'].includes(process.env.TESTEM_AUTOLAUNCH) ?
+    [process.env.TESTEM_AUTOLAUNCH] : typeof process.env.TESTEM_AUTOLAUNCH === 'undefined' ? ['Chrome'] : [],
   browser_start_timeout: 120,
   browser_args: {
     Chrome: {