diff --git a/.browserslistrc b/.browserslistrc
index b09754bd8b..e6815d8a04 100644
--- a/.browserslistrc
+++ b/.browserslistrc
@@ -3,3 +3,6 @@
 last 2 versions
 Firefox ESR
 not dead and supports async-functions
+
+[test]
+current Node
diff --git a/frontend_tests/zjsunit/index.js b/frontend_tests/zjsunit/index.js
index 6ba7de59f0..c5d59eb449 100644
--- a/frontend_tests/zjsunit/index.js
+++ b/frontend_tests/zjsunit/index.js
@@ -16,6 +16,8 @@ const blueslip = require("./zblueslip");
 const zjquery = require("./zjquery");
 const zpage_params = require("./zpage_params");
 
+process.env.NODE_ENV = "test";
+
 const dom = new JSDOM("", {url: "http://zulip.zulipdev.com/"});
 global.DOMParser = dom.window.DOMParser;