Update schema tests (#4127)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: ssbarnea

test/schemas/.mocharc.json

@@ -1,7 +1,11 @@
 {
   "colors": true,
-  "extension": ["ts"],
+  "extensions": ["ts"],
   "require": "ts-node/register",
+  "node-option": [
+    "experimental-specifier-resolution=node",
+    "loader=ts-node/esm"
+  ],
   "slow": "500",
   "spec": "src/**/*.spec.ts"
 }