diff --git a/.babelrc.json b/.babelrc.json
new file mode 100644
index 000000000..f3d8eaf3c
--- /dev/null
+++ b/.babelrc.json
@@ -0,0 +1,3 @@
+{
+  "presets": [["@babel/preset-env", { "modules": "cjs", "targets": { "node": "current" } }]]
+}
diff --git a/.changeset/wicked-actors-grin.md b/.changeset/wicked-actors-grin.md
new file mode 100644
index 000000000..a845151cc
--- /dev/null
+++ b/.changeset/wicked-actors-grin.md
@@ -0,0 +1,2 @@
+---
+---
diff --git a/babel.config.cjs b/babel.config.cjs
deleted file mode 100644
index 01f28736e..000000000
--- a/babel.config.cjs
+++ /dev/null
@@ -1,3 +0,0 @@
-module.exports = {
-  presets: [['@babel/preset-env', { modules: 'cjs', targets: { node: 'current' } }]],
-}
diff --git a/jest.config.js b/jest.config.js
index 0e3fed5ce..c8ab8a141 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -1,21 +1,18 @@
 const config = {
   collectCoverageFrom: [
     'lib/**/*.js',
-    // Avoid ESM import.meta parse error.
-    // (Can't measure coverage anyway, it's always mocked)
+    /**
+     * Instanbul uses babel to parse coverage data,
+     * so `import.meta` is not available
+     */
     '!lib/resolveConfig.js',
   ],
   moduleDirectories: ['node_modules'],
   prettierPath: null,
-  setupFiles: ['./testSetup.js'],
-  snapshotSerializers: ['jest-snapshot-serializer-ansi'],
+  setupFiles: ['./test/testSetup.js'],
+  snapshotSerializers: ['./test/serializer.cjs'],
   testEnvironment: 'node',
-  transform: {
-    '\\.[jt]sx?$': 'babel-jest',
-    '\\.mjs$': 'babel-jest',
-  },
-  /** Also transform ESM packages in `node_modules` */
-  transformIgnorePatterns: [],
+  transform: {},
 }
 
 export default config
diff --git a/package-lock.json b/package-lock.json
index fa1ddb68b..b85dbdba8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -31,9 +31,8 @@
         "@changesets/cli": "2.27.1",
         "@commitlint/cli": "18.4.3",
         "@commitlint/config-conventional": "18.4.3",
-        "babel-jest": "29.7.0",
-        "babel-plugin-transform-imports": "2.0.0",
         "consolemock": "1.1.0",
+        "cross-env": "7.0.3",
         "eslint": "8.55.0",
         "eslint-config-prettier": "9.0.0",
         "eslint-plugin-import": "2.29.0",
@@ -3597,6 +3596,15 @@
         }
       }
     },
+    "node_modules/@jest/core/node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/@jest/core/node_modules/ansi-styles": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
@@ -3646,6 +3654,18 @@
       "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
       "dev": true
     },
+    "node_modules/@jest/core/node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "dev": true,
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/@jest/environment": {
       "version": "29.7.0",
       "resolved": "https://registry.npmjs.org/@jest/environment/-/environment-29.7.0.tgz",
@@ -3761,6 +3781,15 @@
         }
       }
     },
+    "node_modules/@jest/reporters/node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/@jest/reporters/node_modules/ansi-styles": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
@@ -3853,6 +3882,18 @@
         "node": ">=10"
       }
     },
+    "node_modules/@jest/reporters/node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "dev": true,
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/@jest/reporters/node_modules/yallist": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
@@ -4873,16 +4914,6 @@
         "@babel/core": "^7.4.0 || ^8.0.0-0 <8.0.0"
       }
     },
-    "node_modules/babel-plugin-transform-imports": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/babel-plugin-transform-imports/-/babel-plugin-transform-imports-2.0.0.tgz",
-      "integrity": "sha512-65ewumYJ85QiXdcB/jmiU0y0jg6eL6CdnDqQAqQ8JMOKh1E52VPG3NJzbVKWcgovUR5GBH8IWpCXQ7I8Q3wjgw==",
-      "dev": true,
-      "dependencies": {
-        "@babel/types": "^7.4",
-        "is-valid-path": "^0.1.1"
-      }
-    },
     "node_modules/babel-preset-current-node-syntax": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/babel-preset-current-node-syntax/-/babel-preset-current-node-syntax-1.0.1.tgz",
@@ -5211,6 +5242,15 @@
         "node": ">=12"
       }
     },
+    "node_modules/cliui/node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/cliui/node_modules/ansi-styles": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
@@ -5273,6 +5313,18 @@
         "node": ">=8"
       }
     },
+    "node_modules/cliui/node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "dev": true,
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/cliui/node_modules/wrap-ansi": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
@@ -5580,6 +5632,24 @@
       "optional": true,
       "peer": true
     },
+    "node_modules/cross-env": {
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/cross-env/-/cross-env-7.0.3.tgz",
+      "integrity": "sha512-+/HKd6EgcQCJGh2PSjZuUitQBQynKor4wrFbRg4DtAgS1aWO+gU52xpH7M9ScGgXSYmAVS9bIJ8EzuaGw0oNAw==",
+      "dev": true,
+      "dependencies": {
+        "cross-spawn": "^7.0.1"
+      },
+      "bin": {
+        "cross-env": "src/bin/cross-env.js",
+        "cross-env-shell": "src/bin/cross-env-shell.js"
+      },
+      "engines": {
+        "node": ">=10.14",
+        "npm": ">=6",
+        "yarn": ">=1"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.3",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
@@ -5963,6 +6033,27 @@
         "node": ">=8.6"
       }
     },
+    "node_modules/enquirer/node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/enquirer/node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "dev": true,
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/error-ex": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.2.tgz",
@@ -6381,6 +6472,15 @@
         "url": "https://github.com/sponsors/epoberezkin"
       }
     },
+    "node_modules/eslint/node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/eslint/node_modules/ansi-styles": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
@@ -6506,6 +6606,18 @@
       "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
       "dev": true
     },
+    "node_modules/eslint/node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "dev": true,
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/eslint/node_modules/type-fest": {
       "version": "0.20.2",
       "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.20.2.tgz",
@@ -7686,39 +7798,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/is-invalid-path": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/is-invalid-path/-/is-invalid-path-0.1.0.tgz",
-      "integrity": "sha512-aZMG0T3F34mTg4eTdszcGXx54oiZ4NtHSft3hWNJMGJXUUqdIj3cOZuHcU0nCWWcY3jd7yRe/3AEm3vSNTpBGQ==",
-      "dev": true,
-      "dependencies": {
-        "is-glob": "^2.0.0"
-      },
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
-    "node_modules/is-invalid-path/node_modules/is-extglob": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/is-extglob/-/is-extglob-1.0.0.tgz",
-      "integrity": "sha512-7Q+VbVafe6x2T+Tu6NcOf6sRklazEPmBoB3IWk3WdGZM2iGUwU/Oe3Wtq5lSEkDTTlpp8yx+5t4pzO/i9Ty1ww==",
-      "dev": true,
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
-    "node_modules/is-invalid-path/node_modules/is-glob": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-2.0.1.tgz",
-      "integrity": "sha512-a1dBeB19NXsf/E0+FHqkagizel/LQw2DjSQpvQrj3zT+jYPpaUCryPnrQajXKFLCMuf4I6FhRpaGtw4lPrG6Eg==",
-      "dev": true,
-      "dependencies": {
-        "is-extglob": "^1.0.0"
-      },
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
     "node_modules/is-negative-zero": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/is-negative-zero/-/is-negative-zero-2.0.2.tgz",
@@ -7898,18 +7977,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/is-valid-path": {
-      "version": "0.1.1",
-      "resolved": "https://registry.npmjs.org/is-valid-path/-/is-valid-path-0.1.1.tgz",
-      "integrity": "sha512-+kwPrVDu9Ms03L90Qaml+79+6DZHqHyRoANI6IsZJ/g8frhnfchDOBCa0RbQ6/kdHt5CS5OeIEyrYznNuVN+8A==",
-      "dev": true,
-      "dependencies": {
-        "is-invalid-path": "^0.1.0"
-      },
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
     "node_modules/is-weakref": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/is-weakref/-/is-weakref-1.0.2.tgz",
@@ -9150,21 +9217,6 @@
         "node": ">=16"
       }
     },
-    "node_modules/jest-snapshot-serializer-ansi/node_modules/strip-ansi": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.0.tgz",
-      "integrity": "sha512-iq6eVVI64nQQTRYq2KtEg2d2uU7LElhTJwsH4YzIHZshxlgZms/wIc4VoDQTlG/IvVIrBKG06CrZnp0qv7hkcQ==",
-      "dev": true,
-      "dependencies": {
-        "ansi-regex": "^6.0.1"
-      },
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/strip-ansi?sponsor=1"
-      }
-    },
     "node_modules/jest-snapshot/node_modules/ansi-styles": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
@@ -9861,20 +9913,6 @@
         "url": "https://github.com/chalk/slice-ansi?sponsor=1"
       }
     },
-    "node_modules/log-update/node_modules/strip-ansi": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.0.tgz",
-      "integrity": "sha512-iq6eVVI64nQQTRYq2KtEg2d2uU7LElhTJwsH4YzIHZshxlgZms/wIc4VoDQTlG/IvVIrBKG06CrZnp0qv7hkcQ==",
-      "dependencies": {
-        "ansi-regex": "^6.0.1"
-      },
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/strip-ansi?sponsor=1"
-      }
-    },
     "node_modules/log-update/node_modules/type-fest": {
       "version": "3.13.1",
       "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-3.13.1.tgz",
@@ -11459,6 +11497,15 @@
         "node": ">=6"
       }
     },
+    "node_modules/smartwrap/node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/smartwrap/node_modules/ansi-styles": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
@@ -11569,6 +11616,18 @@
         "node": ">=8"
       }
     },
+    "node_modules/smartwrap/node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "dev": true,
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/smartwrap/node_modules/wrap-ansi": {
       "version": "6.2.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
@@ -11813,6 +11872,27 @@
         "node": ">=10"
       }
     },
+    "node_modules/string-length/node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/string-length/node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "dev": true,
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/string-width": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-7.0.0.tgz",
@@ -11829,20 +11909,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/string-width/node_modules/strip-ansi": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.0.tgz",
-      "integrity": "sha512-iq6eVVI64nQQTRYq2KtEg2d2uU7LElhTJwsH4YzIHZshxlgZms/wIc4VoDQTlG/IvVIrBKG06CrZnp0qv7hkcQ==",
-      "dependencies": {
-        "ansi-regex": "^6.0.1"
-      },
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/strip-ansi?sponsor=1"
-      }
-    },
     "node_modules/string.prototype.trim": {
       "version": "1.2.8",
       "resolved": "https://registry.npmjs.org/string.prototype.trim/-/string.prototype.trim-1.2.8.tgz",
@@ -11912,24 +11978,17 @@
       }
     },
     "node_modules/strip-ansi": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
-      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.0.tgz",
+      "integrity": "sha512-iq6eVVI64nQQTRYq2KtEg2d2uU7LElhTJwsH4YzIHZshxlgZms/wIc4VoDQTlG/IvVIrBKG06CrZnp0qv7hkcQ==",
       "dependencies": {
-        "ansi-regex": "^5.0.1"
+        "ansi-regex": "^6.0.1"
       },
       "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/strip-ansi/node_modules/ansi-regex": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
-      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
-      "dev": true,
-      "engines": {
-        "node": ">=8"
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/strip-ansi?sponsor=1"
       }
     },
     "node_modules/strip-bom": {
@@ -12245,6 +12304,15 @@
         "node": ">=8.0.0"
       }
     },
+    "node_modules/tty-table/node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/tty-table/node_modules/ansi-styles": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
@@ -12303,6 +12371,18 @@
         "node": ">=6"
       }
     },
+    "node_modules/tty-table/node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "dev": true,
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/type-check": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
@@ -12700,20 +12780,6 @@
         "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
     },
-    "node_modules/wrap-ansi/node_modules/strip-ansi": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.0.tgz",
-      "integrity": "sha512-iq6eVVI64nQQTRYq2KtEg2d2uU7LElhTJwsH4YzIHZshxlgZms/wIc4VoDQTlG/IvVIrBKG06CrZnp0qv7hkcQ==",
-      "dependencies": {
-        "ansi-regex": "^6.0.1"
-      },
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/strip-ansi?sponsor=1"
-      }
-    },
     "node_modules/wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
@@ -12793,6 +12859,15 @@
         "node": ">=6"
       }
     },
+    "node_modules/yargs/node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/yargs/node_modules/emoji-regex": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
@@ -12822,6 +12897,18 @@
         "node": ">=8"
       }
     },
+    "node_modules/yargs/node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "dev": true,
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/yargs/node_modules/yargs-parser": {
       "version": "21.1.1",
       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-21.1.1.tgz",
diff --git a/package.json b/package.json
index 609b800c8..68e491c8e 100644
--- a/package.json
+++ b/package.json
@@ -29,8 +29,8 @@
   ],
   "scripts": {
     "lint": "eslint .",
-    "test": "jest --coverage",
-    "test:watch": "jest --watch",
+    "test": "cross-env NODE_OPTIONS=--experimental-vm-modules npx jest --coverage",
+    "test:watch": "npm run test -- --watch",
     "version": "npx changeset version",
     "postversion": "npm i --package-lock-only && git commit -am \"chore(changeset): release\"",
     "tag": "npx changeset tag"
@@ -55,9 +55,8 @@
     "@changesets/cli": "2.27.1",
     "@commitlint/cli": "18.4.3",
     "@commitlint/config-conventional": "18.4.3",
-    "babel-jest": "29.7.0",
-    "babel-plugin-transform-imports": "2.0.0",
     "consolemock": "1.1.0",
+    "cross-env": "7.0.3",
     "eslint": "8.55.0",
     "eslint-config-prettier": "9.0.0",
     "eslint-plugin-import": "2.29.0",
diff --git a/test/e2e/__utils__/getLintStagedExecutor.js b/test/e2e/__utils__/getLintStagedExecutor.js
index cbbff6245..deb40ff65 100644
--- a/test/e2e/__utils__/getLintStagedExecutor.js
+++ b/test/e2e/__utils__/getLintStagedExecutor.js
@@ -1,8 +1,11 @@
-import { resolve } from 'node:path'
+import path from 'node:path'
+import { fileURLToPath } from 'node:url'
 
 import { execaCommand } from 'execa'
 
-const lintStagedBin = resolve(__dirname, '../../../bin/lint-staged.js')
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
+
+const lintStagedBin = path.resolve(__dirname, '../../../bin/lint-staged.js')
 
 /**
  * @param {string} cwd
diff --git a/test/e2e/no-stash.test.js b/test/e2e/no-stash.test.js
index e454835f9..d46296cdb 100644
--- a/test/e2e/no-stash.test.js
+++ b/test/e2e/no-stash.test.js
@@ -1,5 +1,3 @@
-import '../integration/__mocks__/resolveConfig.js'
-
 import { jest } from '@jest/globals'
 
 import { withGitIntegration } from '../integration/__utils__/withGitIntegration.js'
diff --git a/test/e2e/stdin-config.test.js b/test/e2e/stdin-config.test.js
index 9c002fdc4..e3ad8db15 100644
--- a/test/e2e/stdin-config.test.js
+++ b/test/e2e/stdin-config.test.js
@@ -1,5 +1,3 @@
-import '../integration/__mocks__/resolveConfig.js'
-
 import { jest } from '@jest/globals'
 
 import { withGitIntegration } from '../integration/__utils__/withGitIntegration.js'
diff --git a/test/integration/__mocks__/dynamicImport.js b/test/integration/__mocks__/dynamicImport.js
deleted file mode 100644
index 5fd38b13d..000000000
--- a/test/integration/__mocks__/dynamicImport.js
+++ /dev/null
@@ -1,4 +0,0 @@
-jest.mock('../../../lib/dynamicImport.js', () => ({
-  // 'pathToFileURL' is not supported with Jest + Babel
-  dynamicImport: jest.fn().mockImplementation(async (input) => require(input)),
-}))
diff --git a/test/integration/__mocks__/resolveConfig.js b/test/integration/__mocks__/resolveConfig.js
deleted file mode 100644
index 842f9e17a..000000000
--- a/test/integration/__mocks__/resolveConfig.js
+++ /dev/null
@@ -1,10 +0,0 @@
-/** Unfortunately necessary due to non-ESM tests. */
-jest.mock('../../../lib/resolveConfig.js', () => ({
-  resolveConfig: (configPath) => {
-    try {
-      return require.resolve(configPath)
-    } catch {
-      return configPath
-    }
-  },
-}))
diff --git a/test/integration/allow-empty.test.js b/test/integration/allow-empty.test.js
index 33a71b32d..d742471f0 100644
--- a/test/integration/allow-empty.test.js
+++ b/test/integration/allow-empty.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import { jest } from '@jest/globals'
 
 import { withGitIntegration } from './__utils__/withGitIntegration.js'
diff --git a/test/integration/basic-functionality.test.js b/test/integration/basic-functionality.test.js
index 51d53df65..da6b76679 100644
--- a/test/integration/basic-functionality.test.js
+++ b/test/integration/basic-functionality.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import fs from 'node:fs/promises'
 import path from 'node:path'
 
diff --git a/test/integration/binary-files.test.js b/test/integration/binary-files.test.js
index c61ca93d7..af563f894 100644
--- a/test/integration/binary-files.test.js
+++ b/test/integration/binary-files.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import { jest } from '@jest/globals'
 
 import { withGitIntegration } from './__utils__/withGitIntegration.js'
diff --git a/test/integration/diff-options.test.js b/test/integration/diff-options.test.js
index ba3e8611b..7df7e32c8 100644
--- a/test/integration/diff-options.test.js
+++ b/test/integration/diff-options.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import { jest } from '@jest/globals'
 import makeConsoleMock from 'consolemock'
 
diff --git a/test/integration/file-resurrection.test.js b/test/integration/file-resurrection.test.js
index aee4d4235..b25073dee 100644
--- a/test/integration/file-resurrection.test.js
+++ b/test/integration/file-resurrection.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import fs from 'node:fs/promises'
 import path from 'node:path'
 
diff --git a/test/integration/files-outside-cwd.test.js b/test/integration/files-outside-cwd.test.js
index 1beb1cea3..bfcbc79f3 100644
--- a/test/integration/files-outside-cwd.test.js
+++ b/test/integration/files-outside-cwd.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import path from 'node:path'
 
 import { jest } from '@jest/globals'
diff --git a/test/integration/git-amend.test.js b/test/integration/git-amend.test.js
index 77f5c49a8..8bdf3faa5 100644
--- a/test/integration/git-amend.test.js
+++ b/test/integration/git-amend.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import { jest } from '@jest/globals'
 
 import { withGitIntegration } from './__utils__/withGitIntegration.js'
diff --git a/test/integration/git-lock-file.test.js b/test/integration/git-lock-file.test.js
index f1dd3f8bd..f53e98a71 100644
--- a/test/integration/git-lock-file.test.js
+++ b/test/integration/git-lock-file.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import { jest } from '@jest/globals'
 
 import { withGitIntegration } from './__utils__/withGitIntegration.js'
diff --git a/test/integration/git-submodules.test.js b/test/integration/git-submodules.test.js
index 9e5587f7f..96245863e 100644
--- a/test/integration/git-submodules.test.js
+++ b/test/integration/git-submodules.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import fs from 'node:fs/promises'
 import path from 'node:path'
 
diff --git a/test/integration/git-worktree.test.js b/test/integration/git-worktree.test.js
index b8bef8fb1..68fbcfb5a 100644
--- a/test/integration/git-worktree.test.js
+++ b/test/integration/git-worktree.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import path from 'node:path'
 
 import { jest } from '@jest/globals'
diff --git a/test/integration/gitWorkFlow.test.js b/test/integration/gitWorkFlow.test.js
index 7ae752e0c..bd0fbb211 100644
--- a/test/integration/gitWorkFlow.test.js
+++ b/test/integration/gitWorkFlow.test.js
@@ -1,10 +1,7 @@
-import './__mocks__/resolveConfig.js'
-
 import path from 'node:path'
 
-import { jest as jestGlobals } from '@jest/globals'
+import { jest } from '@jest/globals'
 
-import { writeFile } from '../../lib/file.js'
 import { GitWorkflow } from '../../lib/gitWorkflow.js'
 import { getInitialState } from '../../lib/state.js'
 import {
@@ -17,15 +14,14 @@ import {
 import { normalizeWindowsNewlines } from './__utils__/normalizeWindowsNewlines.js'
 import { withGitIntegration } from './__utils__/withGitIntegration.js'
 
-jestGlobals.mock('../../lib/file.js', () => {
-  return {
-    // notice `jestGlobals` vs `jest` here... this will be changed with `jest.unstable_mockModule`
-    writeFile: jest.fn(() => Promise.resolve()),
-  }
-})
+jest.unstable_mockModule('../../lib/file.js', () => ({
+  writeFile: jest.fn(() => Promise.resolve()),
+}))
+
+const { writeFile } = await import('../../lib/file.js')
 
-jestGlobals.setTimeout(20000)
-jestGlobals.retryTimes(2)
+jest.setTimeout(20000)
+jest.retryTimes(2)
 
 describe('gitWorkflow', () => {
   describe('prepare', () => {
diff --git a/test/integration/merge-conflict.test.js b/test/integration/merge-conflict.test.js
index 63c3cf3b4..601552a55 100644
--- a/test/integration/merge-conflict.test.js
+++ b/test/integration/merge-conflict.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import fs from 'node:fs'
 import path from 'node:path'
 
diff --git a/test/integration/multiple-config-files.test.js b/test/integration/multiple-config-files.test.js
index 70387e512..f3a771a21 100644
--- a/test/integration/multiple-config-files.test.js
+++ b/test/integration/multiple-config-files.test.js
@@ -1,6 +1,3 @@
-import './__mocks__/resolveConfig.js'
-import './__mocks__/dynamicImport.js'
-
 import path from 'node:path'
 
 import { jest as jestGlobals } from '@jest/globals'
diff --git a/test/integration/no-initial-commit.test.js b/test/integration/no-initial-commit.test.js
index 507289301..52d2430f3 100644
--- a/test/integration/no-initial-commit.test.js
+++ b/test/integration/no-initial-commit.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import { jest } from '@jest/globals'
 
 import { withGitIntegration } from './__utils__/withGitIntegration.js'
diff --git a/test/integration/no-stash.test.js b/test/integration/no-stash.test.js
index 769efbb8d..5463a8717 100644
--- a/test/integration/no-stash.test.js
+++ b/test/integration/no-stash.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import fs from 'node:fs'
 import path from 'node:path'
 
diff --git a/test/integration/non-ascii.test.js b/test/integration/non-ascii.test.js
index 9db92fd83..89645e676 100644
--- a/test/integration/non-ascii.test.js
+++ b/test/integration/non-ascii.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import { jest } from '@jest/globals'
 
 import { withGitIntegration } from './__utils__/withGitIntegration.js'
diff --git a/test/integration/not-inside-git-repo.test.js b/test/integration/not-inside-git-repo.test.js
index fffee9439..7fb97225a 100644
--- a/test/integration/not-inside-git-repo.test.js
+++ b/test/integration/not-inside-git-repo.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import fs from 'node:fs/promises'
 
 import { jest } from '@jest/globals'
diff --git a/test/integration/parent-globs.test.js b/test/integration/parent-globs.test.js
index 51229f88d..e2c097293 100644
--- a/test/integration/parent-globs.test.js
+++ b/test/integration/parent-globs.test.js
@@ -1,6 +1,3 @@
-import './__mocks__/resolveConfig.js'
-import './__mocks__/dynamicImport.js'
-
 import path from 'node:path'
 
 import { jest } from '@jest/globals'
diff --git a/test/integration/partially-staged-changes.test.js b/test/integration/partially-staged-changes.test.js
index 450fe5769..1356caf0b 100644
--- a/test/integration/partially-staged-changes.test.js
+++ b/test/integration/partially-staged-changes.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import { jest } from '@jest/globals'
 
 import { normalizeWindowsNewlines } from './__utils__/normalizeWindowsNewlines.js'
diff --git a/test/integration/symlink-git-dir.test.js b/test/integration/symlink-git-dir.test.js
index cea8e4c66..1f8261e22 100644
--- a/test/integration/symlink-git-dir.test.js
+++ b/test/integration/symlink-git-dir.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import fs from 'node:fs/promises'
 import path from 'node:path'
 
diff --git a/test/integration/symlinked-config.test.js b/test/integration/symlinked-config.test.js
index 3b1adc0f6..35022446c 100644
--- a/test/integration/symlinked-config.test.js
+++ b/test/integration/symlinked-config.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import fs from 'node:fs/promises'
 import path from 'node:path'
 
diff --git a/test/integration/untracked-files.test.js b/test/integration/untracked-files.test.js
index b5df9fb9e..986cfcf7a 100644
--- a/test/integration/untracked-files.test.js
+++ b/test/integration/untracked-files.test.js
@@ -1,5 +1,3 @@
-import './__mocks__/resolveConfig.js'
-
 import { jest } from '@jest/globals'
 
 import { withGitIntegration } from './__utils__/withGitIntegration.js'
diff --git a/test/serializer.cjs b/test/serializer.cjs
new file mode 100644
index 000000000..243a67e95
--- /dev/null
+++ b/test/serializer.cjs
@@ -0,0 +1,40 @@
+/**
+ * Inlined functionality of `jest-snapshot-serializer-ansi` converted to CJS
+ * until Jest supports loading ESM snapshot serializers.
+ * @see https://github.com/jestjs/jest/issues/11167
+ */
+
+/** @see https://github.com/chalk/ansi-regex/blob/02fa893d619d3da85411acc8fd4e2eea0e95a9d9/index.js */
+const ansiRegex = ({ onlyFirst = false } = {}) => {
+  const pattern = [
+    '[\\u001B\\u009B][[\\]()#;?]*(?:(?:(?:(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]+)*|[a-zA-Z\\d]+(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]*)*)?\\u0007)',
+    '(?:(?:\\d{1,4}(?:;\\d{0,4})*)?[\\dA-PR-TZcf-nq-uy=><~]))',
+  ].join('|')
+
+  return new RegExp(pattern, onlyFirst ? undefined : 'g')
+}
+
+const onlyFirstRegex = ansiRegex({ onlyFirst: true })
+
+/** @see https://github.com/chalk/has-ansi/blob/a285373adebe5e01f325d5a2e9df2686a09bc0d7/index.js */
+const hasAnsi = (string) => onlyFirstRegex.test(string)
+
+const allRegex = ansiRegex()
+
+/** @see https://github.com/chalk/strip-ansi/blob/1fdc531d4046cbaa830460f5c74452bf1f0a0884/index.js */
+const stripAnsi = (string) => {
+  if (typeof string !== 'string') {
+    throw new TypeError(`Expected a \`string\`, got \`${typeof string}\``)
+  }
+
+  // Even though the regex is global, we don't need to reset the `.lastIndex`
+  // because unlike `.exec()` and `.test()`, `.replace()` does it automatically
+  // and doing it manually has a performance penalty.
+  return string.replace(allRegex, '')
+}
+
+/** @see https://github.com/ikatyang/jest-snapshot-serializer-ansi/blob/3ca79ba5a2201124b4b616f728b4a92b7388fc68/src/index.ts */
+module.exports = {
+  test: (value) => typeof value === 'string' && hasAnsi(value),
+  print: (value, serialize) => serialize(stripAnsi(value)),
+}
diff --git a/testSetup.js b/test/testSetup.js
similarity index 100%
rename from testSetup.js
rename to test/testSetup.js
diff --git a/test/unit/__mocks__/advanced-config.js b/test/unit/__mocks__/advanced-cjs-config.cjs
similarity index 100%
rename from test/unit/__mocks__/advanced-config.js
rename to test/unit/__mocks__/advanced-cjs-config.cjs
diff --git a/test/unit/__mocks__/advanced-esm-config.js b/test/unit/__mocks__/advanced-esm-config.js
new file mode 100644
index 000000000..6f470c436
--- /dev/null
+++ b/test/unit/__mocks__/advanced-esm-config.js
@@ -0,0 +1,4 @@
+export default {
+  '*.css': (filenames) => `echo ${filenames.join(' ')}`,
+  '*.js': (filenames) => filenames.map((filename) => `echo ${filename}`),
+}
diff --git a/test/unit/__utils__/getMockExeca.js b/test/unit/__utils__/getMockExeca.js
new file mode 100644
index 000000000..496731ba0
--- /dev/null
+++ b/test/unit/__utils__/getMockExeca.js
@@ -0,0 +1,12 @@
+import { jest } from '@jest/globals'
+
+import { mockExecaReturnValue } from './mockExecaReturnValue.js'
+
+export const getMockExeca = async (mockReturnValue = {}) => {
+  jest.unstable_mockModule('execa', () => {
+    const execa = jest.fn().mockImplementation(() => mockExecaReturnValue(mockReturnValue))
+    return { execa, execaCommand: execa }
+  })
+
+  return import('execa')
+}
diff --git a/test/unit/__utils__/getMockListr2.js b/test/unit/__utils__/getMockListr2.js
new file mode 100644
index 000000000..7769ef297
--- /dev/null
+++ b/test/unit/__utils__/getMockListr2.js
@@ -0,0 +1,16 @@
+import { jest } from '@jest/globals'
+import { figures } from 'listr2'
+
+export const getMockListr2 = async () => {
+  const mockRunner = jest.fn()
+  mockRunner.run = jest.fn()
+
+  jest.unstable_mockModule('listr2', () => ({
+    Listr: jest.fn(() => mockRunner),
+    ListrLogger: jest.fn(),
+    figures,
+    ProcessOutput: jest.fn(),
+  }))
+
+  return import('listr2')
+}
diff --git a/test/unit/execGit.spec.js b/test/unit/execGit.spec.js
index 8b49dca50..97b40117a 100644
--- a/test/unit/execGit.spec.js
+++ b/test/unit/execGit.spec.js
@@ -1,14 +1,9 @@
 import path from 'node:path'
 
-import { execa } from 'execa'
+import { getMockExeca } from './__utils__/getMockExeca.js'
 
-import { execGit, GIT_GLOBAL_OPTIONS } from '../../lib/execGit.js'
-
-import { mockExecaReturnValue } from './__utils__/mockExecaReturnValue.js'
-
-jest.mock('execa', () => ({
-  execa: jest.fn(() => mockExecaReturnValue()),
-}))
+const { execa } = await getMockExeca()
+const { execGit, GIT_GLOBAL_OPTIONS } = await import('../../lib/execGit.js')
 
 test('GIT_GLOBAL_OPTIONS', () => {
   expect(GIT_GLOBAL_OPTIONS).toMatchInlineSnapshot(`
diff --git a/test/unit/getBackupStash.spec.js b/test/unit/getBackupStash.spec.js
index 4b53819c1..85f64be37 100644
--- a/test/unit/getBackupStash.spec.js
+++ b/test/unit/getBackupStash.spec.js
@@ -1,12 +1,18 @@
-import { execGit } from '../../lib/execGit.js'
-import { GitWorkflow, STASH } from '../../lib/gitWorkflow.js'
+import { jest } from '@jest/globals'
+
 import { getInitialState } from '../../lib/state.js'
 import { GetBackupStashError } from '../../lib/symbols'
 
-jest.mock('../../lib/execGit.js', () => ({
-  execGit: jest.fn(async () => ''),
+jest.unstable_mockModule('../../lib/execGit.js', () => ({
+  execGit: jest.fn(async () => {
+    /** Mock fails by default */
+    return ''
+  }),
 }))
 
+const { execGit } = await import('../../lib/execGit.js')
+const { GitWorkflow, STASH } = await import('../../lib/gitWorkflow.js')
+
 describe('gitWorkflow', () => {
   const options = { gitConfigDir: '.' }
 
diff --git a/test/unit/getStagedFiles.spec.js b/test/unit/getStagedFiles.spec.js
index 901c0c5dc..b8efb6536 100644
--- a/test/unit/getStagedFiles.spec.js
+++ b/test/unit/getStagedFiles.spec.js
@@ -1,10 +1,15 @@
 import path from 'node:path'
 
-import { execGit } from '../../lib/execGit.js'
-import { getStagedFiles } from '../../lib/getStagedFiles.js'
+import { jest } from '@jest/globals'
+
 import { normalizePath } from '../../lib/normalizePath.js'
 
-jest.mock('../../lib/execGit.js')
+jest.unstable_mockModule('../../lib/execGit.js', () => ({
+  execGit: jest.fn(async () => ''),
+}))
+
+const { execGit } = await import('../../lib/execGit.js')
+const { getStagedFiles } = await import('../../lib/getStagedFiles.js')
 
 // Windows filepaths
 const normalizeWindowsPath = (input) => normalizePath(path.resolve('/', input))
diff --git a/test/unit/index.spec.js b/test/unit/index.spec.js
index e4041c72e..60da63c00 100644
--- a/test/unit/index.spec.js
+++ b/test/unit/index.spec.js
@@ -1,47 +1,21 @@
-import { lilconfig } from 'lilconfig'
 import makeConsoleMock from 'consolemock'
+import { jest } from '@jest/globals'
 
-import { getStagedFiles } from '../../lib/getStagedFiles.js'
-import lintStaged from '../../lib/index.js'
+jest.unstable_mockModule('lilconfig', () => ({
+  lilconfig: jest.fn(),
+}))
 
-jest.unmock('execa')
+jest.unstable_mockModule('../../lib/getStagedFiles.js', () => ({ getStagedFiles: jest.fn() }))
 
-jest.mock('lilconfig', () => {
-  const actual = jest.requireActual('lilconfig')
-  return {
-    lilconfig: jest.fn((name, options) => actual.lilconfig(name, options)),
-  }
-})
+jest.unstable_mockModule('../../lib/gitWorkflow.js', () => ({ GitWorkflow: jest.fn() }))
 
-const mockLilConfig = (result) => {
-  lilconfig.mockImplementationOnce(() => ({
-    search: () => Promise.resolve(result),
-  }))
-}
-
-/**
- * This converts paths into `file://` urls, but this doesn't
- * work with `import()` when using babel + jest.
- */
-jest.mock('node:url', () => ({
-  pathToFileURL: (path) => path,
+jest.unstable_mockModule('../../lib/validateOptions.js', () => ({
+  validateOptions: jest.fn().mockImplementation(async () => void {}),
 }))
 
-jest.mock('../../lib/getStagedFiles.js')
-jest.mock('../../lib/gitWorkflow.js')
-jest.mock('../../lib/resolveConfig.js', () => ({
-  /** Unfortunately necessary due to non-ESM tests. */
-  resolveConfig: (configPath) => {
-    try {
-      return require.resolve(configPath)
-    } catch {
-      return configPath
-    }
-  },
-}))
-jest.mock('../../lib/validateOptions.js', () => ({
-  validateOptions: jest.fn().mockImplementation(async () => {}),
-}))
+const { lilconfig } = await import('lilconfig')
+const { getStagedFiles } = await import('../../lib/getStagedFiles.js')
+const { default: lintStaged } = await import('../../lib/index.js')
 
 // TODO: Never run tests in the project's WC because this might change source files git status
 
@@ -56,7 +30,7 @@ describe('lintStaged', () => {
     expect.assertions(1)
 
     const config = { '*': 'mytask' }
-    mockLilConfig({ config })
+    lilconfig({ config })
 
     await lintStaged(undefined, logger)
 
@@ -79,7 +53,7 @@ describe('lintStaged', () => {
   it('should use use the console if no logger is passed', async () => {
     expect.assertions(1)
 
-    mockLilConfig({ config: {} })
+    lilconfig({ config: {} })
 
     const previousConsole = console
     const mockedConsole = makeConsoleMock()
diff --git a/test/unit/index2.spec.js b/test/unit/index2.spec.js
index 890c5aa82..98afacb45 100644
--- a/test/unit/index2.spec.js
+++ b/test/unit/index2.spec.js
@@ -1,40 +1,35 @@
 import path from 'node:path'
+import { fileURLToPath } from 'node:url'
 
-import { Listr } from 'listr2'
+import { jest } from '@jest/globals'
 import makeConsoleMock from 'consolemock'
 
-import lintStaged from '../../lib/index.js'
+import { getMockListr2 } from './__utils__/getMockListr2.js'
 
-import { mockExecaReturnValue } from './__utils__/mockExecaReturnValue.js'
+const { Listr } = await getMockListr2()
 
-jest.mock('execa', () => ({
-  execa: jest.fn(() => mockExecaReturnValue()),
-}))
-
-jest.mock('listr2')
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
 
 const MOCK_CONFIG_FILE = path.join(__dirname, '__mocks__', 'my-config.json')
 const MOCK_STAGED_FILE = path.resolve(__dirname, '__mocks__', 'sample.js')
 
-jest.mock('../../lib/getStagedFiles.js', () => ({
-  getStagedFiles: async () => [MOCK_STAGED_FILE],
+jest.unstable_mockModule('../../lib/execGit.js', () => ({
+  execGit: jest.fn(async () => {
+    /** Mock fails by default */
+    return ''
+  }),
 }))
 
-jest.mock('../../lib/resolveConfig.js', () => ({
-  /** Unfortunately necessary due to non-ESM tests. */
-  resolveConfig: (configPath) => {
-    try {
-      return require.resolve(configPath)
-    } catch {
-      return configPath
-    }
-  },
+jest.unstable_mockModule('../../lib/getStagedFiles.js', () => ({
+  getStagedFiles: jest.fn(async () => [MOCK_STAGED_FILE]),
 }))
 
-jest.mock('../../lib/resolveGitRepo.js', () => ({
-  resolveGitRepo: async () => ({ gitDir: 'foo', gitConfigDir: 'bar' }),
+jest.unstable_mockModule('../../lib/resolveGitRepo.js', () => ({
+  resolveGitRepo: jest.fn(async () => ({ gitDir: 'foo', gitConfigDir: 'bar' })),
 }))
 
+const { default: lintStaged } = await import('../../lib/index.js')
+
 describe('lintStaged', () => {
   afterEach(() => {
     Listr.mockClear()
@@ -67,7 +62,7 @@ describe('lintStaged', () => {
     })
   })
 
-  it('should catch errors from js function config', async () => {
+  it.only('should catch errors from js function config', async () => {
     const logger = makeConsoleMock()
     const config = {
       '*': () => {
diff --git a/test/unit/index3.spec.js b/test/unit/index3.spec.js
index 051984544..5e6a0304f 100644
--- a/test/unit/index3.spec.js
+++ b/test/unit/index3.spec.js
@@ -1,18 +1,21 @@
+import { jest } from '@jest/globals'
 import makeConsoleMock from 'consolemock'
 
-import lintStaged from '../../lib/index.js'
-import { runAll } from '../../lib/runAll.js'
-import { getInitialState } from '../../lib/state.js'
-import { ApplyEmptyCommitError, ConfigNotFoundError, GitError } from '../../lib/symbols.js'
-
-jest.mock('../../lib/validateOptions.js', () => ({
+jest.unstable_mockModule('../../lib/validateOptions.js', () => ({
   validateOptions: jest.fn(async () => {}),
 }))
 
-jest.mock('../../lib/runAll.js', () => ({
+jest.unstable_mockModule('../../lib/runAll.js', () => ({
   runAll: jest.fn(async () => {}),
 }))
 
+const { default: lintStaged } = await import('../../lib/index.js')
+const { runAll } = await import('../../lib/runAll.js')
+const { getInitialState } = await import('../../lib/state.js')
+const { ApplyEmptyCommitError, ConfigNotFoundError, GitError } = await import(
+  '../../lib/symbols.js'
+)
+
 describe('lintStaged', () => {
   it('should log error when configuration not found', async () => {
     const ctx = getInitialState()
diff --git a/test/unit/loadConfig.spec.js b/test/unit/loadConfig.spec.js
index 963700210..3fa633493 100644
--- a/test/unit/loadConfig.spec.js
+++ b/test/unit/loadConfig.spec.js
@@ -1,29 +1,14 @@
 import fs from 'node:fs/promises'
 import path from 'node:path'
+import { fileURLToPath } from 'node:url'
 
+import { jest } from '@jest/globals'
 import makeConsoleMock from 'consolemock'
 
 import { createTempDir } from '../__utils__/createTempDir.js'
 import { loadConfig } from '../../lib/loadConfig.js'
 
-/** Unfortunately necessary due to non-ESM tests. */
-jest.mock('../../lib/resolveConfig.js', () => ({
-  resolveConfig: (configPath) => {
-    try {
-      return require.resolve(configPath)
-    } catch {
-      return configPath
-    }
-  },
-}))
-
-/**
- * This converts paths into `file://` urls, but this doesn't
- * work with `import()` when using babel + jest.
- */
-jest.mock('node:url', () => ({
-  pathToFileURL: (path) => path,
-}))
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
 
 describe('loadConfig', () => {
   const logger = makeConsoleMock()
@@ -73,11 +58,43 @@ describe('loadConfig', () => {
     expect(config).toBeUndefined()
   })
 
-  it('should load CommonJS config file from absolute path', async () => {
+  it('should load advanced config from absolute .js filepath', async () => {
+    expect.assertions(1)
+
+    const { config } = await loadConfig(
+      { configPath: path.join(__dirname, '__mocks__', 'advanced-esm-config.js') },
+      logger
+    )
+
+    expect(config).toMatchInlineSnapshot(`
+      {
+        "*.css": [Function],
+        "*.js": [Function],
+      }
+    `)
+  })
+
+  it('should load advanced config file from relative .js filepath', async () => {
+    expect.assertions(1)
+
+    const { config } = await loadConfig(
+      { configPath: path.join('test', 'unit', '__mocks__', 'advanced-esm-config.js') },
+      logger
+    )
+
+    expect(config).toMatchInlineSnapshot(`
+      {
+        "*.css": [Function],
+        "*.js": [Function],
+      }
+    `)
+  })
+
+  it('should load CommonJS config from absolute .cjs file', async () => {
     expect.assertions(1)
 
     const { config } = await loadConfig(
-      { configPath: path.join(__dirname, '__mocks__', 'advanced-config.js') },
+      { configPath: path.join(__dirname, '__mocks__', 'advanced-cjs-config.cjs') },
       logger
     )
 
@@ -93,7 +110,7 @@ describe('loadConfig', () => {
     expect.assertions(1)
 
     const { config } = await loadConfig(
-      { configPath: path.join('test', 'unit', '__mocks__', 'advanced-config.js') },
+      { configPath: path.join('test', 'unit', '__mocks__', 'advanced-cjs-config.cjs') },
       logger
     )
 
@@ -105,7 +122,7 @@ describe('loadConfig', () => {
     `)
   })
 
-  it('should load CommonJS config file from .cjs file', async () => {
+  it('should load CommonJS from relative .cjs file', async () => {
     expect.assertions(1)
 
     const { config } = await loadConfig(
diff --git a/test/unit/makeCmdTasks.spec.js b/test/unit/makeCmdTasks.spec.js
index fe1569250..a599fd056 100644
--- a/test/unit/makeCmdTasks.spec.js
+++ b/test/unit/makeCmdTasks.spec.js
@@ -1,12 +1,8 @@
-import { execa } from 'execa'
+import { getMockExeca } from './__utils__/getMockExeca.js'
 
-import { makeCmdTasks } from '../../lib/makeCmdTasks.js'
+const { execa } = await getMockExeca()
 
-import { mockExecaReturnValue } from './__utils__/mockExecaReturnValue.js'
-
-jest.mock('execa', () => ({
-  execa: jest.fn(() => mockExecaReturnValue()),
-}))
+const { makeCmdTasks } = await import('../../lib/makeCmdTasks.js')
 
 describe('makeCmdTasks', () => {
   const gitDir = process.cwd()
diff --git a/test/unit/printTaskOutput.spec.js b/test/unit/printTaskOutput.spec.js
index f7ba4ce7e..f6a94173b 100644
--- a/test/unit/printTaskOutput.spec.js
+++ b/test/unit/printTaskOutput.spec.js
@@ -1,3 +1,5 @@
+import { jest } from '@jest/globals'
+
 import { printTaskOutput } from '../../lib/printTaskOutput.js'
 
 const logger = {
diff --git a/test/unit/resolveGitRepo.spec.js b/test/unit/resolveGitRepo.spec.js
index 9f63d0835..11cd00e01 100644
--- a/test/unit/resolveGitRepo.spec.js
+++ b/test/unit/resolveGitRepo.spec.js
@@ -1,12 +1,11 @@
 import path from 'node:path'
+import { fileURLToPath } from 'node:url'
 
 import { normalizePath } from '../../lib/normalizePath.js'
 import { determineGitDir, resolveGitRepo } from '../../lib/resolveGitRepo.js'
 
-/**
- * resolveGitRepo runs execa, so the mock needs to be disabled for these tests
- */
-jest.unmock('execa')
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = path.dirname(__filename)
 
 describe('resolveGitRepo', () => {
   it('should resolve to current working dir when .git is in the same dir', async () => {
diff --git a/test/unit/resolveTaskFn.spec.js b/test/unit/resolveTaskFn.spec.js
index 3de8b29de..8df03bf25 100644
--- a/test/unit/resolveTaskFn.spec.js
+++ b/test/unit/resolveTaskFn.spec.js
@@ -1,27 +1,24 @@
-import { execa, execaCommand } from 'execa'
-import pidTree from 'pidtree'
+import { jest } from '@jest/globals'
 
-import { resolveTaskFn } from '../../lib/resolveTaskFn.js'
 import { getInitialState } from '../../lib/state.js'
 import { TaskError } from '../../lib/symbols.js'
 
+import { getMockExeca } from './__utils__/getMockExeca.js'
 import { mockExecaReturnValue } from './__utils__/mockExecaReturnValue.js'
 
-jest.useFakeTimers()
+const { execa, execaCommand } = await getMockExeca()
 
-jest.mock('execa', () => ({
-  execa: jest.fn(() => mockExecaReturnValue()),
-  execaCommand: jest.fn(() => mockExecaReturnValue()),
+jest.unstable_mockModule('pidtree', () => ({
+  default: jest.fn(async () => []),
 }))
 
-jest.mock('pidtree', () => jest.fn(async () => []))
+const { default: pidTree } = await import('pidtree')
 
-const defaultOpts = { files: ['test.js'] }
+const { resolveTaskFn } = await import('../../lib/resolveTaskFn.js')
+
+jest.useFakeTimers()
 
-const mockExecaImplementationOnce = (value) => {
-  execa.mockImplementationOnce(() => mockExecaReturnValue(value))
-  execaCommand.mockImplementationOnce(() => mockExecaReturnValue(value))
-}
+const defaultOpts = { files: ['test.js'] }
 
 describe('resolveTaskFn', () => {
   beforeEach(() => {
@@ -153,13 +150,15 @@ describe('resolveTaskFn', () => {
 
   it('should throw error for failed linters', async () => {
     expect.assertions(1)
-    mockExecaImplementationOnce({
-      stdout: 'Mock error',
-      stderr: '',
-      code: 0,
-      failed: true,
-      cmd: 'mock cmd',
-    })
+    execa.mockReturnValueOnce(
+      mockExecaReturnValue({
+        stdout: 'Mock error',
+        stderr: '',
+        code: 0,
+        failed: true,
+        cmd: 'mock cmd',
+      })
+    )
 
     const taskFn = resolveTaskFn({ ...defaultOpts, command: 'mock-fail-linter' })
     await expect(taskFn()).rejects.toThrowErrorMatchingInlineSnapshot(`"mock-fail-linter [FAILED]"`)
@@ -167,15 +166,17 @@ describe('resolveTaskFn', () => {
 
   it('should throw error for interrupted processes', async () => {
     expect.assertions(1)
-    mockExecaImplementationOnce({
-      stdout: 'Mock error',
-      stderr: '',
-      code: 0,
-      failed: false,
-      killed: false,
-      signal: 'SIGINT',
-      cmd: 'mock cmd',
-    })
+    execa.mockReturnValueOnce(
+      mockExecaReturnValue({
+        stdout: 'Mock error',
+        stderr: '',
+        code: 0,
+        failed: false,
+        killed: false,
+        signal: 'SIGINT',
+        cmd: 'mock cmd',
+      })
+    )
 
     const taskFn = resolveTaskFn({ ...defaultOpts, command: 'mock-killed-linter' })
     await expect(taskFn()).rejects.toThrowErrorMatchingInlineSnapshot(
@@ -185,15 +186,17 @@ describe('resolveTaskFn', () => {
 
   it('should throw error for killed processes without signal', async () => {
     expect.assertions(1)
-    mockExecaImplementationOnce({
-      stdout: 'Mock error',
-      stderr: '',
-      code: 0,
-      failed: false,
-      killed: true,
-      signal: undefined,
-      cmd: 'mock cmd',
-    })
+    execa.mockReturnValueOnce(
+      mockExecaReturnValue({
+        stdout: 'Mock error',
+        stderr: '',
+        code: 0,
+        failed: false,
+        killed: true,
+        signal: undefined,
+        cmd: 'mock cmd',
+      })
+    )
 
     const taskFn = resolveTaskFn({ ...defaultOpts, command: 'mock-killed-linter' })
     await expect(taskFn()).rejects.toThrowErrorMatchingInlineSnapshot(
@@ -210,13 +213,16 @@ describe('resolveTaskFn', () => {
   })
 
   it('should add TaskError on error', async () => {
-    mockExecaImplementationOnce({
-      stdout: 'Mock error',
-      stderr: '',
-      code: 0,
-      failed: true,
-      cmd: 'mock cmd',
-    })
+    execa.mockReturnValueOnce(
+      mockExecaReturnValue({
+        stdout: 'Mock error',
+        stderr: '',
+        code: 0,
+        failed: true,
+        cmd: 'mock cmd',
+      })
+    )
+
     const context = getInitialState()
     const taskFn = resolveTaskFn({ ...defaultOpts, command: 'mock-fail-linter' })
     expect.assertions(2)
@@ -228,15 +234,17 @@ describe('resolveTaskFn', () => {
 
   it('should not add output when there is none', async () => {
     expect.assertions(2)
-    mockExecaImplementationOnce({
-      stdout: '',
-      stderr: '',
-      code: 0,
-      failed: false,
-      killed: false,
-      signal: undefined,
-      cmd: 'mock cmd',
-    })
+    execa.mockReturnValueOnce(
+      mockExecaReturnValue({
+        stdout: '',
+        stderr: '',
+        code: 0,
+        failed: false,
+        killed: false,
+        signal: undefined,
+        cmd: 'mock cmd',
+      })
+    )
 
     const taskFn = resolveTaskFn({ ...defaultOpts, command: 'mock cmd', verbose: true })
     const context = getInitialState()
@@ -247,15 +255,17 @@ describe('resolveTaskFn', () => {
 
   it('should add output even when task succeeds if `verbose: true`', async () => {
     expect.assertions(2)
-    mockExecaImplementationOnce({
-      stdout: 'Mock success',
-      stderr: '',
-      code: 0,
-      failed: false,
-      killed: false,
-      signal: undefined,
-      cmd: 'mock cmd',
-    })
+    execa.mockReturnValueOnce(
+      mockExecaReturnValue({
+        stdout: 'Mock success',
+        stderr: '',
+        code: 0,
+        failed: false,
+        killed: false,
+        signal: undefined,
+        cmd: 'mock cmd',
+      })
+    )
 
     const taskFn = resolveTaskFn({ ...defaultOpts, command: 'mock cmd', verbose: true })
     const context = getInitialState()
@@ -272,15 +282,17 @@ describe('resolveTaskFn', () => {
 
   it('should not add title to output when task errors while quiet', async () => {
     expect.assertions(2)
-    mockExecaImplementationOnce({
-      stdout: '',
-      stderr: 'stderr',
-      code: 1,
-      failed: true,
-      killed: false,
-      signal: undefined,
-      cmd: 'mock cmd',
-    })
+    execa.mockReturnValueOnce(
+      mockExecaReturnValue({
+        stdout: '',
+        stderr: 'stderr',
+        code: 1,
+        failed: true,
+        killed: false,
+        signal: undefined,
+        cmd: 'mock cmd',
+      })
+    )
 
     const taskFn = resolveTaskFn({ ...defaultOpts, command: 'mock cmd' })
     const context = getInitialState({ quiet: true })
@@ -295,15 +307,17 @@ describe('resolveTaskFn', () => {
 
   it('should not print anything when task errors without output while quiet', async () => {
     expect.assertions(2)
-    mockExecaImplementationOnce({
-      stdout: '',
-      stderr: '',
-      code: 1,
-      failed: true,
-      killed: false,
-      signal: undefined,
-      cmd: 'mock cmd',
-    })
+    execa.mockReturnValueOnce(
+      mockExecaReturnValue({
+        stdout: '',
+        stderr: '',
+        code: 1,
+        failed: true,
+        killed: false,
+        signal: undefined,
+        cmd: 'mock cmd',
+      })
+    )
 
     const taskFn = resolveTaskFn({ ...defaultOpts, command: 'mock cmd' })
     const context = getInitialState({ quiet: true })
diff --git a/test/unit/resolveTaskFn.unmocked.spec.js b/test/unit/resolveTaskFn.unmocked.spec.js
index e60649d09..61502791f 100644
--- a/test/unit/resolveTaskFn.unmocked.spec.js
+++ b/test/unit/resolveTaskFn.unmocked.spec.js
@@ -1,8 +1,6 @@
 import { resolveTaskFn } from '../../lib/resolveTaskFn.js'
 import { getInitialState } from '../../lib/state.js'
 
-jest.unmock('execa')
-
 describe('resolveTaskFn', () => {
   it('should call execa with shell when configured so', async () => {
     const taskFn = resolveTaskFn({
diff --git a/test/unit/runAll.spec.js b/test/unit/runAll.spec.js
index fc5990ade..7f45d3aa4 100644
--- a/test/unit/runAll.spec.js
+++ b/test/unit/runAll.spec.js
@@ -1,46 +1,49 @@
 import path from 'node:path'
 
+import { jest } from '@jest/globals'
 import makeConsoleMock from 'consolemock'
-import { execa } from 'execa'
+import normalize from 'normalize-path'
 
-import { getStagedFiles } from '../../lib/getStagedFiles.js'
-import { GitWorkflow } from '../../lib/gitWorkflow.js'
 import { normalizePath } from '../../lib/normalizePath.js'
-import { resolveGitRepo } from '../../lib/resolveGitRepo.js'
-import { runAll } from '../../lib/runAll.js'
-import * as searchConfigsNS from '../../lib/searchConfigs.js'
-import { ConfigNotFoundError, GitError } from '../../lib/symbols.js'
 
 import { mockExecaReturnValue } from './__utils__/mockExecaReturnValue.js'
+import { getMockExeca } from './__utils__/getMockExeca.js'
 
-jest.mock('execa', () => ({
-  execa: jest.fn(() => mockExecaReturnValue()),
-}))
+const { execa } = await getMockExeca()
 
-jest.mock('../../lib/file.js')
-jest.mock('../../lib/getStagedFiles.js')
-jest.mock('../../lib/gitWorkflow.js')
-jest.mock('../../lib/resolveGitRepo.js')
+jest.unstable_mockModule('../../lib/getStagedFiles.js', () => ({
+  getStagedFiles: jest.fn(async () => []),
+}))
 
-jest.mock('../../lib/resolveConfig.js', () => ({
-  /** Unfortunately necessary due to non-ESM tests. */
-  resolveConfig: (configPath) => {
-    try {
-      return require.resolve(configPath)
-    } catch {
-      return configPath
-    }
-  },
+const mockGitWorkflow = {
+  prepare: jest.fn(() => Promise.resolve()),
+  hideUnstagedChanges: jest.fn(() => Promise.resolve()),
+  applyModifications: jest.fn(() => Promise.resolve()),
+  restoreUnstagedChanges: jest.fn(() => Promise.resolve()),
+  restoreOriginalState: jest.fn(() => Promise.resolve()),
+  cleanup: jest.fn(() => Promise.resolve()),
+}
+
+jest.unstable_mockModule('../../lib/gitWorkflow.js', () => ({
+  GitWorkflow: jest.fn(() => mockGitWorkflow),
 }))
 
-const searchConfigs = jest.spyOn(searchConfigsNS, 'searchConfigs')
+jest.unstable_mockModule('../../lib/resolveGitRepo.js', () => ({
+  resolveGitRepo: jest.fn(async () => {
+    const cwd = process.cwd()
+    return { gitConfigDir: normalize(path.resolve(cwd, '.git')), gitDir: normalize(cwd) }
+  }),
+}))
 
-getStagedFiles.mockImplementation(async () => [])
+jest.unstable_mockModule('../../lib/searchConfigs.js', () => ({
+  searchConfigs: jest.fn(async () => ({})),
+}))
 
-resolveGitRepo.mockImplementation(async () => {
-  const cwd = process.cwd()
-  return { gitConfigDir: normalizePath(path.resolve(cwd, '.git')), gitDir: normalizePath(cwd) }
-})
+const { getStagedFiles } = await import('../../lib/getStagedFiles.js')
+const { GitWorkflow } = await import('../../lib/gitWorkflow.js')
+const { runAll } = await import('../../lib/runAll.js')
+const { searchConfigs } = await import('../../lib/searchConfigs.js')
+const { ConfigNotFoundError, GitError } = await import('../../lib/symbols.js')
 
 const configPath = '.lintstagedrc.json'
 
@@ -62,7 +65,7 @@ describe('runAll', () => {
 
   it('should resolve the promise with no tasks', async () => {
     expect.assertions(1)
-    await expect(runAll({ configObject: {}, configPath })).resolves.toBeTruthy()
+    await expect(runAll({})).resolves.toBeTruthy()
   })
 
   it('should throw when failed to find staged files', async () => {
@@ -111,40 +114,56 @@ describe('runAll', () => {
   })
 
   it('should exit without output when no staged files match configured tasks and quiet', async () => {
-    expect.assertions(1)
+    expect.assertions(2)
+
     getStagedFiles.mockImplementationOnce(async () => ['sample.js'])
-    await runAll({ configObject: { '*.css': ['echo "sample"'] }, configPath, quiet: true })
+    searchConfigs.mockImplementationOnce(async () => ({
+      '': { '*.css': 'echo "sample"' },
+    }))
+
+    await expect(runAll({ quiet: true })).resolves.toBeTruthy()
+
     expect(console.printHistory()).toMatchInlineSnapshot(`""`)
   })
 
   it('should not skip tasks if there are files', async () => {
     expect.assertions(1)
     getStagedFiles.mockImplementationOnce(async () => ['sample.js'])
-    await runAll({ configObject: { '*.js': ['echo "sample"'] }, configPath })
+    searchConfigs.mockImplementationOnce(async () => ({
+      '': { '*.js': 'echo "sample"' },
+    }))
+
+    await runAll({})
+
     expect(console.printHistory()).toMatch(/"data":"COMPLETED".*Running tasks for staged files/)
   })
 
   it('should skip tasks if previous git error', async () => {
     expect.assertions(2)
+
     getStagedFiles.mockImplementationOnce(async () => ['sample.js'])
-    GitWorkflow.mockImplementationOnce(() => ({
-      ...jest.requireActual('../../lib/gitWorkflow.js'),
-      prepare: (ctx) => {
-        ctx.errors.add(GitError)
-        throw new Error('test error')
-      },
+    searchConfigs.mockImplementationOnce(async () => ({
+      '': { '*.js': 'echo "sample"' },
     }))
 
-    await expect(
-      runAll({ configObject: { '*.js': ['echo "sample"'] }, configPath })
-    ).rejects.toThrowErrorMatchingInlineSnapshot(`"lint-staged failed"`)
+    mockGitWorkflow.prepare.mockImplementationOnce((ctx) => {
+      ctx.errors.add(GitError)
+      throw new Error('test')
+    })
+
+    await expect(runAll({})).rejects.toThrowErrorMatchingInlineSnapshot(`"lint-staged failed"`)
 
     expect(console.printHistory()).toMatch(/"data":"SKIPPED".*Running tasks for staged files/)
   })
 
   it('should skip applying unstaged modifications if there are errors during linting', async () => {
     expect.assertions(2)
+
     getStagedFiles.mockImplementationOnce(async () => ['sample.js'])
+    searchConfigs.mockImplementationOnce(async () => ({
+      '': { '*.js': 'echo "sample"' },
+    }))
+
     execa.mockImplementation(() =>
       mockExecaReturnValue({
         stdout: '',
@@ -155,16 +174,19 @@ describe('runAll', () => {
       })
     )
 
-    await expect(
-      runAll({ configObject: { '*.js': ['echo "sample"'] }, configPath })
-    ).rejects.toThrowErrorMatchingInlineSnapshot(`"lint-staged failed"`)
+    await expect(runAll({})).rejects.toThrowErrorMatchingInlineSnapshot(`"lint-staged failed"`)
 
     expect(console.printHistory()).toMatch(/"data":"SKIPPED".*Applying modifications from tasks/)
   })
 
   it('should skip tasks and restore state if terminated', async () => {
     expect.assertions(2)
+
     getStagedFiles.mockImplementationOnce(async () => ['sample.js'])
+    searchConfigs.mockImplementationOnce(async () => ({
+      '': { '*.js': 'echo "sample"' },
+    }))
+
     execa.mockImplementation(() =>
       mockExecaReturnValue({
         stdout: '',
@@ -177,9 +199,7 @@ describe('runAll', () => {
       })
     )
 
-    await expect(
-      runAll({ configObject: { '*.js': ['echo "sample"'] }, configPath })
-    ).rejects.toThrowErrorMatchingInlineSnapshot(`"lint-staged failed"`)
+    await expect(runAll({})).rejects.toThrowErrorMatchingInlineSnapshot(`"lint-staged failed"`)
 
     expect(console.printHistory()).toMatch(
       /"data":"COMPLETED".*Reverting to original state because of errors/
@@ -197,6 +217,10 @@ describe('runAll', () => {
 
     const mockTask = jest.fn(() => ['echo "sample"'])
 
+    searchConfigs.mockImplementationOnce(async () => ({
+      '': { '*.js': mockTask },
+    }))
+
     // actual cwd
     const cwd = process.cwd()
     // For the test, set cwd in test/
@@ -206,8 +230,6 @@ describe('runAll', () => {
     // This means the sample task will receive `foo.js`
     await expect(
       runAll({
-        configObject: { '*.js': mockTask },
-        configPath,
         stash: false,
         relative: true,
         cwd: innerCwd,
@@ -297,7 +319,11 @@ describe('runAll', () => {
 
   it('should warn when "git add" was used in commands', async () => {
     getStagedFiles.mockImplementationOnce(async () => ['sample.js'])
-    await expect(runAll({ configObject: { '*.js': ['git add'] } })).rejects.toThrowError()
+    searchConfigs.mockResolvedValueOnce({
+      '.lintstagedrc.json': { '*.js': 'git add' },
+    })
+
+    await expect(runAll({})).rejects.toThrowError()
     expect(console.printHistory()).toMatch('Some of your tasks use `git add` command')
   })
 
diff --git a/test/unit/searchConfigs.spec.js b/test/unit/searchConfigs.spec.js
index 9739e62b2..fcc156831 100644
--- a/test/unit/searchConfigs.spec.js
+++ b/test/unit/searchConfigs.spec.js
@@ -1,11 +1,11 @@
-import path from 'node:path'
+import path from 'path'
+import { fileURLToPath } from 'url'
+
+import { jest } from '@jest/globals'
 
-import { execGit } from '../../lib/execGit.js'
-import { loadConfig } from '../../lib/loadConfig.js'
 import { normalizePath } from '../../lib/normalizePath.js'
-import { searchConfigs } from '../../lib/searchConfigs.js'
 
-jest.mock('../../lib/resolveConfig', () => ({
+jest.unstable_mockModule('../../lib/resolveConfig.js', () => ({
   /** Unfortunately necessary due to non-ESM tests. */
   resolveConfig: (configPath) => {
     try {
@@ -16,24 +16,25 @@ jest.mock('../../lib/resolveConfig', () => ({
   },
 }))
 
-jest.mock('../../lib/execGit.js', () => ({
+jest.unstable_mockModule('../../lib/execGit.js', () => ({
   execGit: jest.fn(async () => {
     /** Mock fails by default */
     return ''
   }),
 }))
 
-jest.mock('../../lib/loadConfig.js', () => {
-  const { searchPlaces } = jest.requireActual('../../lib/loadConfig.js')
+jest.unstable_mockModule('../../lib/loadConfig.js', () => ({
+  loadConfig: jest.fn(async () => {
+    /** Mock fails by default */
+    return {}
+  }),
+}))
+
+const { execGit } = await import('../../lib/execGit.js')
+const { loadConfig } = await import('../../lib/loadConfig.js')
+const { searchConfigs } = await import('../../lib/searchConfigs.js')
 
-  return {
-    searchPlaces,
-    loadConfig: jest.fn(async () => {
-      /** Mock fails by default */
-      return {}
-    }),
-  }
-})
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
 
 describe('searchConfigs', () => {
   afterEach(() => {
diff --git a/test/unit/validateOptions.spec.js b/test/unit/validateOptions.spec.js
index d0f928e47..2de937bfe 100644
--- a/test/unit/validateOptions.spec.js
+++ b/test/unit/validateOptions.spec.js
@@ -2,6 +2,7 @@ import { constants } from 'node:fs'
 import fs from 'node:fs/promises'
 import path from 'node:path'
 
+import { jest } from '@jest/globals'
 import makeConsoleMock from 'consolemock'
 
 import { validateOptions } from '../../lib/validateOptions.js'