diff --git a/services/web/webpack.config.js b/services/web/webpack.config.js
index 9f82eec062..46eb0e6847 100644
--- a/services/web/webpack.config.js
+++ b/services/web/webpack.config.js
@@ -185,7 +185,7 @@ module.exports = {
               // bring up more workers after they timed out
               poolRespawn: true,
               // limit concurrency (one per entrypoint and let the small includes queue up)
-              workers: 6,
+              workers: process.env.NODE_ENV === 'test' ? 1 : 6,
             },
           },
           // Compiles the Less syntax to CSS