diff --git a/jest.config.cjs b/jest.config.cjs
index ea6b6706..18bb8139 100644
--- a/jest.config.cjs
+++ b/jest.config.cjs
@@ -1,7 +1,18 @@
 module.exports = {
-  preset: 'ts-jest',
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1'
+  },
+  extensionsToTreatAsEsm: ['.ts'],
+  transform: {
+    '^.+\\.(mt|t|cj|j)s$': [
+      'ts-jest',
+      {
+        useESM: true
+      }
+    ]
+  },
   testEnvironment: 'node',
   testMatch: [
-    '<rootDir>/build/**/__tests__/*.js'
+    '<rootDir>/**/__tests__/*.ts'
   ]
 }
diff --git a/package.json b/package.json
index fbbfcbde..a83b795f 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
   "scripts": {
     "lint": "yarn ts-standard",
     "fix": "yarn ts-standard --fix",
-    "test": "yarn build && cross-env NODE_OPTIONS=\"--experimental-vm-modules\" jest --runInBand",
+    "test": "cross-env NODE_OPTIONS=\"--experimental-vm-modules\" jest --runInBand",
     "build": "tsc -p tsconfig.json",
     "build-release": "tsc  -p tsconfig.release.json",
     "clean": "tsc -b --clean && rm -rf build/*",
diff --git a/tsconfig.json b/tsconfig.json
index 871ed609..3b503295 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -10,7 +10,6 @@
     "module": "ESNext",
     "esModuleInterop": true,
     "moduleResolution": "Node",
-    "rootDir": "./src",
     "outDir": "build",
     "sourceMap": true,
     "strictNullChecks": true,
@@ -21,4 +20,4 @@
   "include": [
     "src/**/*.ts",
   ]
-}
\ No newline at end of file
+}