jestでのテスト実行時にエイリアスが機能せずcan not find moduleとなる

src以下のファイルを「@」で読み込みたいのですが、うまく機能しません。
どこかおかしいところがあれば教えていただきたいです
package.json

{
  "name": "cuee",
  "version": "1.0.0",
  "description": "Serverless webpack example using Typescript",
  "main": "handler.js",
  "scripts": {
    "test": "jest"
  },
  "jest": {
    "moduleFileExtensions": [
      "ts",
      "tsx",
      "js"
    ],
    "moduleDirectories": [
      "node_modules",
      "src"
    ],
    "moduleNameMapper": {
      "^@/(.*)$": "<rootDir>/src/$1"
    },
    "transform": {
      "^.+\.(ts|tsx)$": "ts-jest"
    },
    "globals": {
      "ts-jest": {
        "tsConfigFile": "tsconfig.json"
      }
    },
    "testMatch": [
      "**/__tests__/*.spec.+(ts|tsx|js)"
    ]
  },
  "dependencies": {
    "aws-sdk": "^2.710.0",
    "bcrypt": "^5.0.0",
    "dotenv": "^8.2.0",
    "mysql2": "^2.2.5",
    "pngjs": "^5.0.0",
    "random-number-csprng": "^1.0.2",
    "serverless-nested-stack": "0.0.7",
    "serverless-plugin-split-stacks": "^1.9.3",
    "source-map-support": "^0.5.10",
    "typescript-json-validator": "^2.4.2",
    "uuid": "^8.2.0"
  },
  "devDependencies": {
    "@types/aws-lambda": "^8.10.17",
    "@types/jest": "^26.0.15",
    "@types/node": "^10.12.18",
    "fork-ts-checker-webpack-plugin": "^3.0.1",
    "jest": "^26.6.3",
    "serverless": "^1.74.1",
    "serverless-offline": "^6.4.0",
    "serverless-webpack": "^5.2.0",
    "ts-jest": "^26.4.4",
    "ts-loader": "^5.3.3",
    "typescript": "^3.2.4",
    "webpack": "^4.29.0",
    "webpack-node-externals": "^1.7.2"
  },
  "author": "The serverless webpack authors (https://github.com/elastic-coders/serverless-webpack)",
  "license": "MIT"
}

jest.config.js
1module.exports = {
2  "roots": [
3    "<rootDir>"
4  ],
5  "modulePaths": [
6    "<rootDir>"
7  ],
8  "testMatch": ["<rootDir>/__test__/test_*.spec.ts"],
9  "transform": {
10    "^.+\.tsx?$": "ts-jest"
11  },
12  "moduleFileExtensions": [
13    "ts",
14    "tsx",
15    "js",
16    "jsx",
17    "json",
18    "node"
19  ],
20}