diff --git a/scripts/memory/package-lock.json b/scripts/memory/package-lock.json
new file mode 100644
index 00000000000..884f248f804
--- /dev/null
+++ b/scripts/memory/package-lock.json
@@ -0,0 +1,162 @@
+{
+  "name": "apollo-client-memory-tests",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "apollo-client-memory-tests",
+      "dependencies": {
+        "@apollo/client": "file:../../dist",
+        "graphql": "^16.0.0"
+      }
+    },
+    "../../dist": {
+      "name": "@apollo/client",
+      "version": "3.12.8",
+      "license": "MIT",
+      "dependencies": {
+        "@graphql-typed-document-node/core": "^3.1.1",
+        "@wry/caches": "^1.0.0",
+        "@wry/equality": "^0.5.6",
+        "@wry/trie": "^0.5.0",
+        "graphql-tag": "^2.12.6",
+        "optimism": "^0.18.0",
+        "rehackt": "^0.1.0",
+        "symbol-observable": "^4.0.0",
+        "ts-invariant": "^0.10.3",
+        "tslib": "^2.3.0",
+        "zen-observable-ts": "^1.2.5"
+      },
+      "devDependencies": {
+        "@arethetypeswrong/cli": "0.15.3",
+        "@ark/attest": "0.28.0",
+        "@babel/parser": "7.25.0",
+        "@changesets/changelog-github": "0.5.0",
+        "@changesets/cli": "2.27.7",
+        "@eslint/compat": "1.2.5",
+        "@eslint/eslintrc": "3.2.0",
+        "@eslint/js": "9.18.0",
+        "@graphql-tools/merge": "9.0.4",
+        "@graphql-tools/schema": "10.0.4",
+        "@graphql-tools/utils": "10.5.0",
+        "@jest/expect-utils": "29.7.0",
+        "@jest/globals": "29.7.0",
+        "@microsoft/api-extractor": "7.49.1",
+        "@microsoft/api-extractor-model": "7.30.2",
+        "@microsoft/tsdoc": "0.15.1",
+        "@rollup/plugin-node-resolve": "11.2.1",
+        "@size-limit/esbuild-why": "11.1.4",
+        "@size-limit/preset-small-lib": "11.1.4",
+        "@testing-library/dom": "10.4.0",
+        "@testing-library/jest-dom": "6.6.3",
+        "@testing-library/react": "16.1.0",
+        "@testing-library/react-render-stream": "2.0.0",
+        "@testing-library/user-event": "14.5.2",
+        "@tsconfig/node20": "20.1.4",
+        "@types/bytes": "3.1.4",
+        "@types/fetch-mock": "7.3.8",
+        "@types/glob": "8.1.0",
+        "@types/jest": "29.5.12",
+        "@types/lodash": "4.17.7",
+        "@types/node": "^22.10.7",
+        "@types/node-fetch": "2.6.11",
+        "@types/react": "19.0.0",
+        "@types/react-dom": "19.0.0",
+        "@types/relay-runtime": "14.1.24",
+        "@types/use-sync-external-store": "0.0.6",
+        "@typescript-eslint/eslint-plugin": "8.21.0",
+        "@typescript-eslint/parser": "8.21.0",
+        "@typescript-eslint/rule-tester": "8.21.0",
+        "@typescript-eslint/types": "8.21.0",
+        "@typescript-eslint/utils": "8.21.0",
+        "ast-types": "0.16.1",
+        "blob-polyfill": "7.0.20220408",
+        "bytes": "3.1.2",
+        "eslint": "9.18.0",
+        "eslint-import-resolver-typescript": "3.7.0",
+        "eslint-plugin-import": "npm:@phryneas/eslint-plugin-import@2.27.5-pr.2813.2817.199971c",
+        "eslint-plugin-local-rules": "3.0.2",
+        "eslint-plugin-react-compiler": "19.0.0-beta-decd7b8-20250118",
+        "eslint-plugin-react-hooks": "5.1.0",
+        "eslint-plugin-testing-library": "7.1.1",
+        "expect": "29.7.0",
+        "expect-type": "1.1.0",
+        "fetch-mock": "9.11.0",
+        "glob": "8.1.0",
+        "globals": "15.14.0",
+        "graphql": "16.9.0",
+        "graphql-17-alpha2": "npm:graphql@17.0.0-alpha.2",
+        "graphql-ws": "5.16.0",
+        "jest": "29.7.0",
+        "jest-environment-jsdom": "29.7.0",
+        "jest-junit": "16.0.0",
+        "jest-matcher-utils": "29.7.0",
+        "knip": "^5.42.2",
+        "lodash": "4.17.21",
+        "patch-package": "8.0.0",
+        "pkg-pr-new": "0.0.24",
+        "prettier": "3.1.1",
+        "react": "19.0.0",
+        "react-17": "npm:react@^17",
+        "react-18": "npm:react@^18",
+        "react-dom": "19.0.0",
+        "react-dom-17": "npm:react-dom@^17",
+        "react-dom-18": "npm:react-dom@^18",
+        "react-error-boundary": "4.0.13",
+        "recast": "0.23.9",
+        "rimraf": "5.0.9",
+        "rollup": "2.79.2",
+        "rollup-plugin-cleanup": "3.2.1",
+        "rollup-plugin-terser": "7.0.2",
+        "rxjs": "7.8.1",
+        "size-limit": "11.1.4",
+        "subscriptions-transport-ws": "0.11.0",
+        "terser": "5.31.3",
+        "ts-api-utils": "2.0.0",
+        "ts-jest": "29.2.3",
+        "ts-jest-resolver": "2.0.1",
+        "ts-morph": "25.0.0",
+        "ts-node": "10.9.2",
+        "tsx": "4.19.2",
+        "typedoc": "0.25.0",
+        "typescript": "^5.7.3",
+        "wait-for-observables": "1.0.3",
+        "web-streams-polyfill": "4.0.0"
+      },
+      "peerDependencies": {
+        "graphql": "^15.0.0 || ^16.0.0",
+        "graphql-ws": "^5.5.5",
+        "react": "^17.0.0 || ^18.0.0 || >=19.0.0-rc",
+        "react-dom": "^17.0.0 || ^18.0.0 || >=19.0.0-rc",
+        "subscriptions-transport-ws": "^0.9.0 || ^0.11.0"
+      },
+      "peerDependenciesMeta": {
+        "graphql-ws": {
+          "optional": true
+        },
+        "react": {
+          "optional": true
+        },
+        "react-dom": {
+          "optional": true
+        },
+        "subscriptions-transport-ws": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@apollo/client": {
+      "resolved": "../../dist",
+      "link": true
+    },
+    "node_modules/graphql": {
+      "version": "16.10.0",
+      "resolved": "https://registry.npmjs.org/graphql/-/graphql-16.10.0.tgz",
+      "integrity": "sha512-AjqGKbDGUFRKIRCP9tCKiIGHyriz2oHEbPIbEtcSLSs4YjReZOIPQQWek4+6hjw62H9QShXHyaGivGiYVLeYFQ==",
+      "license": "MIT",
+      "engines": {
+        "node": "^12.22.0 || ^14.16.0 || ^16.0.0 || >=17.0.0"
+      }
+    }
+  }
+}
diff --git a/scripts/memory/package.json b/scripts/memory/package.json
index 1672c0abc81..d73d1a03f0c 100644
--- a/scripts/memory/package.json
+++ b/scripts/memory/package.json
@@ -2,13 +2,10 @@
   "name": "apollo-client-memory-tests",
   "private": true,
   "scripts": {
-    "test": "mocha --exit -n expose-gc tests.js"
+    "test": "node --expose-gc --test tests.cts"
   },
   "dependencies": {
     "@apollo/client": "file:../../dist",
     "graphql": "^16.0.0"
-  },
-  "devDependencies": {
-    "mocha": "11.0.1"
   }
 }
diff --git a/scripts/memory/tests.js b/scripts/memory/tests.cts
similarity index 98%
rename from scripts/memory/tests.js
rename to scripts/memory/tests.cts
index a764f4dac96..23ff95efca3 100644
--- a/scripts/memory/tests.js
+++ b/scripts/memory/tests.cts
@@ -1,4 +1,6 @@
-const assert = require("assert");
+const assert = require("node:assert");
+const { describe, it } = require("node:test");
+
 const {
   ApolloClient,
   InMemoryCache,
@@ -318,7 +320,7 @@ describe("garbage collection", () => {
     assert.strictEqual(typeof getDataFromTree, "function");
 
     const expectedKeys = new Set(["cache", "queryInfo1"]);
-    const renderPromisesSet = new Set();
+    const renderPromisesSet = new Set<any>();
     const registry = makeRegistry((key) => {
       // By retaining the RenderPromises object in a Set in the scope of
       // this callback function, we artificially ensure the RenderPromises
diff --git a/scripts/memory/tsconfig.json b/scripts/memory/tsconfig.json
new file mode 100644
index 00000000000..7df4303890c
--- /dev/null
+++ b/scripts/memory/tsconfig.json
@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "target": "esnext",
+    "module": "nodenext",
+    "allowJs": true,
+    "noEmit": true,
+    "allowImportingTsExtensions": true,
+    "rewriteRelativeImportExtensions": true,
+    "verbatimModuleSyntax": true,
+    "resolveJsonModule": true
+  }
+}