diff --git a/gantt-chart/package.json b/gantt-chart/package.json
index 7756b75..dfe61fc 100644
--- a/gantt-chart/package.json
+++ b/gantt-chart/package.json
@@ -13,7 +13,8 @@
     "build": "yarn plugin-helpers build",
     "plugin-helpers": "node ../../scripts/plugin_helpers",
     "test": "../../node_modules/.bin/jest --config ./test/jest.config.js",
-    "test:cypress": "cypress run"
+    "cypress:run": "TZ=America/Los_Angeles cypress run",
+    "cypress:open": "TZ=America/Los_Angeles cypress open"
   },
   "dependencies": {
     "plotly.js-dist": "^1.57.1",