diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0bddfec..3d03814 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -93,13 +93,17 @@ jobs:
   test:
     docker:
       - image: cimg/node:16.18
+    parallelism: 4
+    resource_class: large
     working_directory: ~/cunningham
     steps:
       - *checkout_cunningham
       - *restore_node_modules
+      - attach_workspace:
+          at: ~/cunningham
       - run:
           name: Run test suites over all workspaces
-          command: yarn test
+          command: yarn test-ci
 
   # ---- Internationalization ----
   crowdin-upload:
@@ -222,4 +226,4 @@ workflows:
           requires:
             - build
             - lint
-            - test
\ No newline at end of file
+            - test
diff --git a/package.json b/package.json
index 01139dc..390681a 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
     "build": "turbo run build",
     "dev": "turbo run dev --parallel",
     "test": "turbo run test",
+    "test-ci": "turbo run test-ci",
     "lint": "turbo run lint",
     "deploy": "turbo run deploy",
     "format": "prettier --write \"**/*.{ts,tsx,md}\""
diff --git a/packages/react/package.json b/packages/react/package.json
index 033ad4d..9c91b40 100644
--- a/packages/react/package.json
+++ b/packages/react/package.json
@@ -33,6 +33,7 @@
     "build-theme": "cunningham -o src -g css,ts,js",
     "preview": "vite preview",
     "test": "FORCE_COLOR=1 vitest run",
+    "test-ci": "VITEST_MIN_THREADS=1 VITEST_MAX_THREADS=3 FORCE_COLOR=1 vitest run --shard $(($CIRCLE_NODE_INDEX + 1))/$CIRCLE_NODE_TOTAL",
     "test-watch": "vitest",
     "coverage": "vitest run --coverage",
     "storybook": "storybook dev -p 6006",
diff --git a/packages/tokens/package.json b/packages/tokens/package.json
index ac3a29c..b3141cb 100644
--- a/packages/tokens/package.json
+++ b/packages/tokens/package.json
@@ -25,11 +25,12 @@
   "scripts": {
     "lint": "eslint . 'src/**/*.{ts,tsx}'",
     "dev": "nodemon --watch 'src/bin' --ext '*' --exec 'yarn build'",
-    "build-bin": "cd src/bin && tsc -p tsconfig.json && tsc-alias && chmod +x ../../dist/bin/Main.js",
+    "build-bin": "cd src/bin && rm -rf ../../dist/bin && tsc -p tsconfig.build.json && tsc-alias && chmod +x ../../dist/bin/Main.js",
     "build-lib": "cp dist/cunningham-tokens.ts src/lib && cd src/lib && tsc -p tsconfig.json",
     "build": "yarn build-bin && yarn build-default-theme && yarn build-lib && cd ../.. && ln -sf ../../packages/tokens/dist/bin/Main.js node_modules/.bin/cunningham",
     "build-default-theme": "./dist/bin/Main.js -o dist -s html -g scss,css,js,ts --utility-classes",
-    "test": "FORCE_COLOR=1 jest --runInBand --verbose src"
+    "test": "FORCE_COLOR=1 jest --runInBand --verbose src",
+    "test-ci": "FORCE_COLOR=1 jest -w 3 --shard $(($CIRCLE_NODE_INDEX + 1))/$CIRCLE_NODE_TOTAL src"
   },
   "dependencies": {
     "chalk": "4.1.2",
diff --git a/packages/tokens/src/bin/tsconfig.build.json b/packages/tokens/src/bin/tsconfig.build.json
new file mode 100644
index 0000000..c4cfa85
--- /dev/null
+++ b/packages/tokens/src/bin/tsconfig.build.json
@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "exclude": [
+    "./__mocks__",
+    "./tests",
+    "**/*.spec.ts",
+  ]
+}
diff --git a/packages/tokens/src/bin/tsconfig.json b/packages/tokens/src/bin/tsconfig.json
index c10559d..dd90337 100644
--- a/packages/tokens/src/bin/tsconfig.json
+++ b/packages/tokens/src/bin/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "extends": "@openfun/typescript-configs/node.json",
   "include": [
-    "**/*",
+    "**/*"
   ],
   "compilerOptions": {
     "baseUrl": "./",
@@ -9,6 +9,6 @@
       "*": ["*"]
     },
     "resolveJsonModule": true,
-    "outDir": "../../dist/bin",
-  }
-}
\ No newline at end of file
+    "outDir": "../../dist/bin"
+  },
+}
diff --git a/turbo.json b/turbo.json
index a39f23d..c552bf4 100644
--- a/turbo.json
+++ b/turbo.json
@@ -27,6 +27,15 @@
         "test/**/*.tsx"
       ]
     },
+    "test-ci": {
+      "outputs": [],
+      "inputs": [
+        "src/**/*.tsx",
+        "src/**/*.ts",
+        "test/**/*.ts",
+        "test/**/*.tsx"
+      ]
+    },
     "deploy": {
       "dependsOn": [
         "build",
diff --git a/yarn.lock b/yarn.lock
index 7436633..30cb18d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4654,7 +4654,7 @@
   resolved "https://registry.yarnpkg.com/@tanstack/table-core/-/table-core-8.9.3.tgz#991da6b015f6200fdc841c48048bee5e197f6a46"
   integrity sha512-NpHZBoHTfqyJk0m/s/+CSuAiwtebhYK90mDuf5eylTvgViNOujiaOaxNDxJkQQAsVvHWZftUGAx1EfO1rkKtLg==
 
-"@testing-library/dom@9.3.1":
+"@testing-library/dom@^9.0.0", "@testing-library/dom@9.3.1":
   version "9.3.1"
   resolved "https://registry.yarnpkg.com/@testing-library/dom/-/dom-9.3.1.tgz#8094f560e9389fb973fe957af41bf766937a9ee9"
   integrity sha512-0DGPd9AR3+iDTjGoMpxIkAsUihHZ3Ai6CneU6bRRrffXMgzCdlNk43jTrD2/5LT6CBb3MWTP8v510JzYtahD2w==
@@ -4668,20 +4668,6 @@
     lz-string "^1.5.0"
     pretty-format "^27.0.2"
 
-"@testing-library/dom@^9.0.0":
-  version "9.3.0"
-  resolved "https://registry.yarnpkg.com/@testing-library/dom/-/dom-9.3.0.tgz#ed8ce10aa5e05eb6eaf0635b5b8975d889f66075"
-  integrity sha512-Dffe68pGwI6WlLRYR2I0piIkyole9cSBH5jGQKCGMRpHW5RHCqAUaqc2Kv0tUyd4dU4DLPKhJIjyKOnjv4tuUw==
-  dependencies:
-    "@babel/code-frame" "^7.10.4"
-    "@babel/runtime" "^7.12.5"
-    "@types/aria-query" "^5.0.1"
-    aria-query "^5.0.0"
-    chalk "^4.1.0"
-    dom-accessibility-api "^0.5.9"
-    lz-string "^1.5.0"
-    pretty-format "^27.0.2"
-
 "@testing-library/jest-dom@5.16.5":
   version "5.16.5"
   resolved "https://registry.yarnpkg.com/@testing-library/jest-dom/-/jest-dom-5.16.5.tgz#3912846af19a29b2dbf32a6ae9c31ef52580074e"