diff --git a/package.json b/package.json
index 065e9cf..ac82a79 100644
--- a/package.json
+++ b/package.json
@@ -26,9 +26,8 @@
     "build": "rollup -c",
     "build:types": "tsc -p src/runtime --emitDeclarationOnly",
     "dev": "rollup -c -w",
-    "test": "jest",
-    "test:ci": "jest --silent",
-    "test:watch": "jest --verbose --watchAll",
+    "test": "cross-env NODE_ICU_DATA=node_modules/full-icu jest",
+    "test:ci": "npm run test -- --silent",
     "lint": "eslint \"{src,test}/**/*.ts\"",
     "format": "prettier --loglevel silent --write \"{src,test}/**/*.ts\"",
     "release": " git add package.json && git commit -m \"chore(release): v$npm_package_version :tada:\"",
@@ -83,7 +82,9 @@
     "babel-core": "^7.0.0-bridge.0",
     "babel-jest": "^26.3.0",
     "conventional-changelog-cli": "^2.1.0",
+    "cross-env": "^7.0.2",
     "eslint": "^7.9.0",
+    "full-icu": "^1.3.1",
     "husky": "^4.3.0",
     "jest": "^26.4.2",
     "lint-staged": "^10.4.0",
diff --git a/yarn.lock b/yarn.lock
index 0131266..f5ac3ba 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2221,6 +2221,13 @@ cosmiconfig@^7.0.0:
     path-type "^4.0.0"
     yaml "^1.10.0"
 
+cross-env@^7.0.2:
+  version "7.0.2"
+  resolved "https://registry.yarnpkg.com/cross-env/-/cross-env-7.0.2.tgz#bd5ed31339a93a3418ac4f3ca9ca3403082ae5f9"
+  integrity sha512-KZP/bMEOJEDCkDQAyRhu3RL2ZO/SUVrxQVI0G3YEQ+OLbRA3c6zgixe8Mq8a/z7+HKlNEjo8oiLUs8iRijY2Rw==
+  dependencies:
+    cross-spawn "^7.0.1"
+
 cross-spawn@^6.0.0:
   version "6.0.5"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
@@ -2232,7 +2239,7 @@ cross-spawn@^6.0.0:
     shebang-command "^1.2.0"
     which "^1.2.9"
 
-cross-spawn@^7.0.0, cross-spawn@^7.0.2:
+cross-spawn@^7.0.0, cross-spawn@^7.0.1, cross-spawn@^7.0.2:
   version "7.0.3"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-7.0.3.tgz#f73a85b9d5d41d045551c177e2882d4ac85728a6"
   integrity sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==
@@ -3008,6 +3015,11 @@ fsevents@~2.1.2:
   resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-2.1.3.tgz#fb738703ae8d2f9fe900c33836ddebee8b97f23e"
   integrity sha512-Auw9a4AxqWpa9GUfj370BMPzzyncfBABW8Mab7BGWBYDj4Isgq+cDKtx0i6u9jcX9pQDnswsaaOTgTmA5pEjuQ==
 
+full-icu@^1.3.1:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/full-icu/-/full-icu-1.3.1.tgz#e67fdf58523f1d1e0d9143b1542fe2024c1c8997"
+  integrity sha512-VMtK//85QJomhk3cXOCksNwOYaw1KWnYTS37GYGgyf7A3ajdBoPGhaJuJWAH2S2kq8GZeXkdKn+3Mfmgy11cVw==
+
 function-bind@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"