diff --git a/.gitpod.yml b/.gitpod.yml
index 1cb42bf..231f1d7 100644
--- a/.gitpod.yml
+++ b/.gitpod.yml
@@ -4,7 +4,7 @@
 tasks:
   - init: |
       yarn install
-      yarn test
+      yarn test --maxWorkers=30%
 github:
   # https://www.gitpod.io/docs/prebuilds/#configure-prebuilds
   prebuilds:
diff --git a/jest.config.js b/jest.config.js
index 3bb6e8f..94efdb1 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -1,5 +1,7 @@
 /** @type {import('jest').Config} */
 module.exports = {
   automock: false,
-  transform: {"\\.ts$": ['ts-jest']},
+  transform: {
+    "\\.ts$": ['ts-jest', { isolatedModules: true }],
+  },
 };