diff --git a/.mocharc.json b/.mocharc.json
index 4181bda..8e3925f 100644
--- a/.mocharc.json
+++ b/.mocharc.json
@@ -2,6 +2,7 @@
   "require": [
     "ts-node/register"
   ],
+  "loader": "ts-node/esm",
   "spec": "src/**/*.test.ts",
   "watch-extensions": "ts",
   "recursive": true