diff --git a/test/cli/samples/watch/watch-config-early-update/_config.js b/test/cli/samples/watch/watch-config-early-update/_config.js
index 93e7190886d..50e316e3b54 100644
--- a/test/cli/samples/watch/watch-config-early-update/_config.js
+++ b/test/cli/samples/watch/watch-config-early-update/_config.js
@@ -4,6 +4,7 @@ const path = require('path');
 let configFile;
 
 module.exports = {
+	solo: true,
 	description: 'immediately reloads the config file if a change happens while it is parsed',
 	command: 'rollup -cw',
 	before() {
@@ -23,7 +24,7 @@ module.exports = {
                 format: 'es'
               }
             }),
-          500
+          1000
         );
       });
   		`