diff --git a/.vscode/extensions.json b/.vscode/extensions.json
index 2956839129..177cfc7f63 100644
--- a/.vscode/extensions.json
+++ b/.vscode/extensions.json
@@ -3,10 +3,9 @@
         "sonarsource.sonarlint-vscode",
         "ms-vscode.cpptools",
         "ms-vscode.cmake-tools",
-        "orta.vscode-jest",
-        "esbenp.prettier-vscode",
-        "dbaeumer.vscode-eslint",
+        "oxc.oxc-vscode",
         "redhat.java",
+        "vitest.explorer",
         "vscjava.vscode-gradle",
         "vscjava.vscode-java-debug"
     ]
diff --git a/Clava-JS/CxxTestSources/test1/lib.cpp b/Clava-JS/CxxTestSources/test1/lib.cpp
deleted file mode 100644
index 0792bc4a1f..0000000000
--- a/Clava-JS/CxxTestSources/test1/lib.cpp
+++ /dev/null
@@ -1,4 +0,0 @@
-#include "lib.h"
-#include <stdio.h>
-
-void foo() { printf("Hello, world!"); }
\ No newline at end of file
diff --git a/Clava-JS/CxxTestSources/test1/lib.h b/Clava-JS/CxxTestSources/test1/lib.h
deleted file mode 100644
index 21eac780fc..0000000000
--- a/Clava-JS/CxxTestSources/test1/lib.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef __LIB_H__
-#define __LIB_H__
-
-void foo();
-
-#endif // __LIB_H__
diff --git a/Clava-JS/CxxTestSources/test1/main.cpp b/Clava-JS/CxxTestSources/test1/main.cpp
deleted file mode 100644
index 7556e5638d..0000000000
--- a/Clava-JS/CxxTestSources/test1/main.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#include "lib.h"
-
-#pragma clava foo
-int main(int argc, char *argv[]) {
-    foo();
-    return 0;
-}
\ No newline at end of file
diff --git a/Clava-JS/README.md b/Clava-JS/README.md
index 0182411ffa..67af82eb1d 100644
--- a/Clava-JS/README.md
+++ b/Clava-JS/README.md
@@ -35,20 +35,12 @@ Starting from the `workspace` directory, execute the following commands to build
 
 ```bash
 npm install
+gradle -p clava/ClavaWeaver installDist
 npm run build -w lara-framework/Lara-JS
 npm run build -w clava/Clava-JS
-npm install
-cd clava/ClavaWeaver
-gradle installDist
-cd ../..
 ```
 
-Finally, copy the JARs in the folder `./clava/ClavaWeaver/build/install/ClavaWeaver/lib` into a new folder called java-binaries in `./clava/Clava-JS`:
-
-```bash
-mkdir clava/Clava-JS/java-binaries
-cp -r ./clava/ClavaWeaver/build/install/ClavaWeaver/lib ./clava/Clava-JS/java-binaries
-```
+The `installDist` task synchronizes the complete ClavaWeaver distribution into `./clava/Clava-JS/java-binaries`. The generated directory is refreshed automatically, including when `installDist` is invoked directly, so do not copy or edit its contents manually. Local `npm pack` and `npm publish` also validate that `java-binaries` is a real, populated directory before creating a package.
 
 Install the package globally:
 
diff --git a/Clava-JS/api/Issues.test.ts b/Clava-JS/api/Issues.test.ts
index 165a255610..d6e3a89fdb 100644
--- a/Clava-JS/api/Issues.test.ts
+++ b/Clava-JS/api/Issues.test.ts
@@ -1,7 +1,7 @@
 import {
   registerSourceCode,
   registerSourceCodes,
-} from "@specs-feup/lara/jest/jestHelpers.ts";
+} from "@specs-feup/lara/vitest/weaverTestHelpers.ts";
 import Query from "@specs-feup/lara/api/weaver/Query.ts";
 import { FunctionJp } from "./Joinpoints.ts";
 import ClavaJoinPoints from "./clava/ClavaJoinPoints.ts";
diff --git a/Clava-JS/api/LegacyIntegrationTests - C.test.ts b/Clava-JS/api/LegacyIntegrationTests - C.test.ts
index 819f278223..ec85066b3a 100644
--- a/Clava-JS/api/LegacyIntegrationTests - C.test.ts	
+++ b/Clava-JS/api/LegacyIntegrationTests - C.test.ts	
@@ -1,12 +1,14 @@
-import { ClavaLegacyTester } from "../jest/ClavaLegacyTester.ts";
+import IdGenerator from "@specs-feup/lara/api/lara/util/IdGenerator.js";
 import JavaTypes from "@specs-feup/lara/api/lara/util/JavaTypes.ts";
-import ClavaJavaTypes from "./clava/ClavaJavaTypes.ts";
+import PrintOnce from "@specs-feup/lara/api/lara/util/PrintOnce.js";
 import path from "path";
+import { ClavaLegacyTester } from "../vitest/ClavaLegacyTester.ts";
+import ClavaJavaTypes from "./clava/ClavaJavaTypes.ts";
 
 const isWindows = process.platform === "win32";
 const isMacOS = process.platform === "darwin";
 
-/* eslint-disable jest/expect-expect */
+/* oxlint-disable vitest/expect-expect */
 describe("CTest", () => {
     function newTester() {
         return new ClavaLegacyTester(
@@ -17,6 +19,11 @@ describe("CTest", () => {
             .setSrcPackage("c/src");
     }
 
+    afterEach(() => {
+        PrintOnce.messagesSet.clear();
+        IdGenerator.idCounter.clear();
+    });
+
     // TODO: Temporarily disabled, Jenkins fails with "Cannot inherit from final class"
     it("Loop", async () => {
         await newTester().test("Loop.js", "loop.c");
@@ -101,7 +108,7 @@ describe("CTest", () => {
         await newTester()
             .checkExpectedOutput(false)
             .test("InlineNasLu.js", "inline_nas_lu.c");
-    });
+    }, 10_000);
 
     it("InlineNasFt", async () => {
         await newTester()
@@ -340,7 +347,7 @@ describe("CApiTest", () => {
         }
 
         await tester.test("InlinerTest.js", "inliner.c");
-    });
+    }, 15_000);
 
     it("StatementDecomposer", async () => {
         await newTester().test(
diff --git a/Clava-JS/api/LegacyIntegrationTests - CXX.test.ts b/Clava-JS/api/LegacyIntegrationTests - CXX.test.ts
index c0bef9b83d..8fd880d59b 100644
--- a/Clava-JS/api/LegacyIntegrationTests - CXX.test.ts	
+++ b/Clava-JS/api/LegacyIntegrationTests - CXX.test.ts	
@@ -1,12 +1,14 @@
-import { ClavaLegacyTester } from "../jest/ClavaLegacyTester.ts";
-import ClavaJavaTypes from "./clava/ClavaJavaTypes.ts";
 import JavaInterop from "@specs-feup/lara/api/lara/JavaInterop.ts";
+import IdGenerator from "@specs-feup/lara/api/lara/util/IdGenerator.js";
+import PrintOnce from "@specs-feup/lara/api/lara/util/PrintOnce.js";
 import path from "path";
+import { ClavaLegacyTester } from "../vitest/ClavaLegacyTester.ts";
+import ClavaJavaTypes from "./clava/ClavaJavaTypes.ts";
 
 const isWindows = process.platform === "win32";
 const isMacOS = process.platform === "darwin";
 
-/* eslint-disable jest/expect-expect */
+/* oxlint-disable vitest/expect-expect */
 describe("CxxTest", () => {
     function newTester() {
         return new ClavaLegacyTester(
@@ -17,6 +19,11 @@ describe("CxxTest", () => {
             .setSrcPackage("cpp/src");
     }
 
+    afterEach(() => {
+        PrintOnce.messagesSet.clear();
+        IdGenerator.idCounter.clear();
+    });
+
     it("Statement", async () => {
         await newTester().test("Statement.js", "statement.cpp");
     });
diff --git a/Clava-JS/api/LegacyIntegrationTests - Issues.test.ts b/Clava-JS/api/LegacyIntegrationTests - Issues.test.ts
index e73847c701..c4782a44ec 100644
--- a/Clava-JS/api/LegacyIntegrationTests - Issues.test.ts	
+++ b/Clava-JS/api/LegacyIntegrationTests - Issues.test.ts	
@@ -1,8 +1,8 @@
-import { ClavaLegacyTester } from "../jest/ClavaLegacyTester.ts";
+import { ClavaLegacyTester } from "../vitest/ClavaLegacyTester.ts";
 import ClavaJavaTypes from "./clava/ClavaJavaTypes.ts";
 import path from "path";
 
-/* eslint-disable jest/expect-expect */
+/* oxlint-disable vitest/expect-expect */
 describe("IssuesTest", () => {
     function newTester() {
         return new ClavaLegacyTester(
diff --git a/Clava-JS/api/Query.test.ts b/Clava-JS/api/Query.test.ts
index ca2fba6d11..f937f5a1fb 100644
--- a/Clava-JS/api/Query.test.ts
+++ b/Clava-JS/api/Query.test.ts
@@ -1,4 +1,4 @@
-import { registerSourceCode } from "@specs-feup/lara/jest/jestHelpers.ts";
+import { registerSourceCode } from "@specs-feup/lara/vitest/weaverTestHelpers.ts";
 import Query from "@specs-feup/lara/api/weaver/Query.ts";
 import { FunctionJp, Loop } from "./Joinpoints.ts";
 
diff --git a/Clava-JS/api/clava/ClavaJavaTypes.ts b/Clava-JS/api/clava/ClavaJavaTypes.ts
index 3f3d47692d..e617cf3b43 100644
--- a/Clava-JS/api/clava/ClavaJavaTypes.ts
+++ b/Clava-JS/api/clava/ClavaJavaTypes.ts
@@ -2,9 +2,9 @@ import JavaTypes, {
   type JavaClasses,
 } from "@specs-feup/lara/api/lara/util/JavaTypes.ts";
 
-// eslint-disable-next-line @typescript-eslint/no-namespace
+// oxlint-disable-next-line typescript/no-namespace
 export namespace ClavaJavaClasses {
-  /* eslint-disable @typescript-eslint/no-empty-object-type */
+  /* oxlint-disable typescript/no-empty-object-type */
   export interface ClavaNodes extends JavaClasses.JavaClass {}
   export interface ClavaNode extends JavaClasses.JavaClass {}
   export interface CxxJoinpoints extends JavaClasses.JavaClass {}
@@ -19,7 +19,7 @@ export namespace ClavaJavaClasses {
   export interface CxxWeaverOption extends JavaClasses.JavaClass {}
   export interface ClavaOptions extends JavaClasses.JavaClass {}
   export interface CodeParser extends JavaClasses.JavaClass {}
-  /* eslint-enable @typescript-eslint/no-empty-object-type */
+  /* oxlint-enable typescript/no-empty-object-type */
 }
 
 /**
diff --git a/Clava-JS/api/clava/ClavaJoinPoints.test.ts b/Clava-JS/api/clava/ClavaJoinPoints.test.ts
index 53cf209c38..ae34056103 100644
--- a/Clava-JS/api/clava/ClavaJoinPoints.test.ts
+++ b/Clava-JS/api/clava/ClavaJoinPoints.test.ts
@@ -1,4 +1,4 @@
-import { registerSourceCode } from "@specs-feup/lara/jest/jestHelpers.ts";
+import { registerSourceCode } from "@specs-feup/lara/vitest/weaverTestHelpers.ts";
 import Query from "@specs-feup/lara/api/weaver/Query.ts";
 import { ExprStmt } from "../Joinpoints.ts";
 import ClavaJoinPoints from "./ClavaJoinPoints.ts";
diff --git a/Clava-JS/api/jest.config.ts b/Clava-JS/api/jest.config.ts
deleted file mode 100644
index 64b53490b5..0000000000
--- a/Clava-JS/api/jest.config.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-import { defineConfig } from "jest";
-import { weaverConfig } from "../code/WeaverConfiguration.ts";
-
-export default defineConfig({
-  preset: "ts-jest/presets/default-esm",
-  testEnvironment: "@specs-feup/lara/jest/jestEnvironment.ts",
-  globalSetup: "@specs-feup/lara/jest/jestGlobalSetup.ts",
-  globalTeardown: "@specs-feup/lara/jest/jestGlobalTeardown.ts",
-  setupFiles: ["@specs-feup/lara/jest/setupFiles/sharedJavaModule.ts"],
-  setupFilesAfterEnv: ["@specs-feup/lara/jest/setupFiles/importSideEffects.ts"],
-  moduleNameMapper: {
-    "(.+)\\.js": "$1",
-  },
-  testEnvironmentOptions: {
-    weaverConfig,
-  },
-});
diff --git a/Clava-JS/clang-plugin-binaries/ClangASTDumper_14.0.6.so b/Clava-JS/clang-plugin-binaries/ClangASTDumper_14.0.6.so
deleted file mode 100755
index d014202170..0000000000
Binary files a/Clava-JS/clang-plugin-binaries/ClangASTDumper_14.0.6.so and /dev/null differ
diff --git a/Clava-JS/clang-plugin-binaries/plugin-14.so b/Clava-JS/clang-plugin-binaries/plugin-14.so
deleted file mode 100755
index 577f9ac1bc..0000000000
Binary files a/Clava-JS/clang-plugin-binaries/plugin-14.so and /dev/null differ
diff --git a/Clava-JS/clang-plugin-binaries/plugin-15.so b/Clava-JS/clang-plugin-binaries/plugin-15.so
deleted file mode 100755
index 6b86438dd0..0000000000
Binary files a/Clava-JS/clang-plugin-binaries/plugin-15.so and /dev/null differ
diff --git a/Clava-JS/clang-plugin-binaries/plugin-16.so b/Clava-JS/clang-plugin-binaries/plugin-16.so
deleted file mode 100755
index a6b176b590..0000000000
Binary files a/Clava-JS/clang-plugin-binaries/plugin-16.so and /dev/null differ
diff --git a/Clava-JS/clava.json b/Clava-JS/clava.json
deleted file mode 100644
index 48ccc2168a..0000000000
--- a/Clava-JS/clava.json
+++ /dev/null
@@ -1 +0,0 @@
-{ "watch": "CxxTestSources/test1" }
diff --git a/Clava-JS/code/ClangPlugin/ClangPlugin.test.ts b/Clava-JS/code/ClangPlugin/ClangPlugin.test.ts
index 376983f398..cea1531967 100644
--- a/Clava-JS/code/ClangPlugin/ClangPlugin.test.ts
+++ b/Clava-JS/code/ClangPlugin/ClangPlugin.test.ts
@@ -1,4 +1,4 @@
-import { jest } from "@jest/globals";
+import { vi } from "vitest";
 import fs from "fs";
 import path from "path";
 
@@ -76,17 +76,17 @@ describe("ClangPlugin", () => {
       const actualMap = await ClangPlugin.getAvailablePlugins();
 
       expect(actualMap).toEqual(expectedMap);
-      jest.restoreAllMocks();
+      vi.restoreAllMocks();
     });
 
     it("should throw an error when the clang-plugin-binaries directory does not exist", async () => {
-      jest.spyOn(fs, "existsSync").mockClear().mockReturnValue(false);
+      vi.spyOn(fs, "existsSync").mockClear().mockReturnValue(false);
 
       await expect(ClangPlugin.getAvailablePlugins()).rejects.toThrow(
         "Could not find 'clang-plugin-binaries' directory"
       );
 
-      jest.restoreAllMocks();
+      vi.restoreAllMocks();
     });
   });
   */
diff --git a/Clava-JS/code/jest.config.ts b/Clava-JS/code/jest.config.ts
deleted file mode 100644
index 76873b4a20..0000000000
--- a/Clava-JS/code/jest.config.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-import { defineConfig } from "jest";
-
-export default defineConfig({
-  preset: "ts-jest/presets/default-esm",
-  testEnvironment: "node",
-  moduleNameMapper: {
-    "(.+)\\.js": "$1",
-  },
-});
diff --git a/Clava-JS/eslint.config.ts b/Clava-JS/eslint.config.ts
deleted file mode 100644
index 7df9bdcf0e..0000000000
--- a/Clava-JS/eslint.config.ts
+++ /dev/null
@@ -1,52 +0,0 @@
-import js from "@eslint/js";
-import eslintConfigPrettier from "eslint-config-prettier";
-import jest from "eslint-plugin-jest";
-import tsdoc from "eslint-plugin-tsdoc";
-import { defineConfig } from "eslint/config";
-import { dirname } from "path";
-import typescriptEslint from "typescript-eslint";
-import { fileURLToPath } from "url";
-
-const __filename = fileURLToPath(import.meta.url);
-const __dirname = dirname(__filename);
-
-export default defineConfig([
-  js.configs.recommended,
-  eslintConfigPrettier,
-  ...typescriptEslint.configs.recommended,
-  {
-    plugins: {
-      "@typescript-eslint": typescriptEslint.plugin,
-      tsdoc,
-    },
-
-    languageOptions: {
-      parser: typescriptEslint.parser,
-      ecmaVersion: 5,
-      sourceType: "script",
-
-      parserOptions: {
-        project: ["./tsconfig.json", "./tsconfig.*.json"],
-        tsconfigRootDir: __dirname,
-      },
-    },
-
-    rules: {
-      "tsdoc/syntax": "warn",
-    },
-  },
-  {
-    ...jest.configs["flat/recommended"],
-    files: ["**/*.spec.ts", "**/*.test.ts"],
-
-    plugins: {
-      jest,
-    },
-
-    languageOptions: {
-      globals: {
-        ...jest.environments.globals.globals,
-      },
-    },
-  },
-]);
diff --git a/Clava-JS/jest.config.ts b/Clava-JS/jest.config.ts
deleted file mode 100644
index cfa242603e..0000000000
--- a/Clava-JS/jest.config.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-import { defineConfig } from "jest";
-
-export default defineConfig({
-  preset: "ts-jest/presets/default-esm",
-  testEnvironment: "node",
-  notify: true,
-  notifyMode: "always",
-  //verbose: true,
-  collectCoverage: false,
-  coverageDirectory: "coverage",
-  coverageReporters: ["text", "lcov"],
-  collectCoverageFrom: ["**/*[^.d].(t|j)s"],
-  coverageProvider: "v8",
-  moduleNameMapper: {
-    "(.+)\\.js": "$1",
-  },
-  projects: ["api", "code"],
-});
diff --git a/Clava-JS/jest/ClavaLegacyTester.ts b/Clava-JS/jest/ClavaLegacyTester.ts
deleted file mode 100644
index a57c0c07e6..0000000000
--- a/Clava-JS/jest/ClavaLegacyTester.ts
+++ /dev/null
@@ -1,44 +0,0 @@
-import ClavaJavaTypes, {
-    type ClavaJavaClasses,
-} from "../api/clava/ClavaJavaTypes.ts";
-
-import { WeaverLegacyTester } from "@specs-feup/lara/jest/WeaverLegacyTester.ts";
-
-export class ClavaLegacyTester extends WeaverLegacyTester {
-    protected readonly WORK_FOLDER: string = "cxx_weaver_output";
-    private readonly standard: ClavaJavaClasses.Standard;
-    private readonly compilerFlags: string;
-
-    public constructor(
-        basePackage: string,
-        standard: ClavaJavaClasses.Standard,
-        compilerFlags: string = ""
-    ) {
-        super(basePackage);
-        this.standard = standard;
-        this.compilerFlags = compilerFlags;
-
-        this.set(ClavaJavaTypes.ClavaOptions.FLAGS, this.compilerFlags);
-    }
-
-    public async test(
-        laraResource: string,
-        ...codeResources: string[]
-    ): Promise<void> {
-        if (this.standard != null) {
-            this.set(ClavaJavaTypes.ClavaOptions.STANDARD, this.standard);
-        }
-
-        this.set(
-            ClavaJavaTypes.CxxWeaverOption.CHECK_SYNTAX,
-            this.checkWovenCodeSyntax
-        );
-        this.set(ClavaJavaTypes.CxxWeaverOption.DISABLE_CLAVA_INFO, true);
-        this.set(ClavaJavaTypes.CxxWeaverOption.DISABLE_CODE_GENERATION);
-
-        // Enable parallel parsing
-        //this.set(ClavaJavaTypes.ParallelCodeParser.PARALLEL_PARSING);
-
-        await super.test(laraResource, ...codeResources);
-    }
-}
diff --git a/Clava-JS/oxlint.config.ts b/Clava-JS/oxlint.config.ts
new file mode 100644
index 0000000000..2f6883cbde
--- /dev/null
+++ b/Clava-JS/oxlint.config.ts
@@ -0,0 +1,6 @@
+import config from "@specs-feup/lara/oxlint.config.ts";
+import { defineConfig } from "oxlint";
+
+export default defineConfig({
+  extends: [config],
+});
diff --git a/Clava-JS/package.json b/Clava-JS/package.json
index a19401e298..b9b559c9f9 100644
--- a/Clava-JS/package.json
+++ b/Clava-JS/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@specs-feup/clava",
-  "version": "3.5.1",
+  "version": "4.0.0",
   "description": "A C/C++ source-to-source compiler written in Typescript",
   "type": "module",
   "bin": {
@@ -23,20 +23,23 @@
     "code",
     "java-binaries",
     ".gitignore",
-    "eslint.config.ts",
-    "jest.config.ts",
     "LICENSE",
+    "oxlint.config.ts",
     "package.json",
     "README.md",
     "tsconfig.json",
-    "typedoc.config.js"
+    "typedoc.config.js",
+    "vitest.config.ts"
   ],
   "scripts": {
     "run": "node ./code/index.ts",
     "build": "tsc",
     "build:watch": "npm run build -- --watch",
-    "lint": "eslint --flag unstable_native_nodejs_ts_config .",
-    "test": "cross-env NODE_OPTIONS=\"$NODE_OPTIONS --experimental-vm-modules\" jest --detectOpenHandles --forceExit",
+    "lint": "oxlint .",
+    "format": "oxfmt .",
+    "format:check": "oxfmt --check .",
+    "prepack": "node --input-type=module --eval \"import { validateJavaBinaries } from '@specs-feup/lara/scripts/validateJavaBinaries.js'; validateJavaBinaries();\"",
+    "test": "vitest run",
     "test:api": "npm run test -- api",
     "test:code": "npm run test -- code",
     "test:cov": "npm run test -- --coverage",
@@ -62,25 +65,20 @@
   },
   "homepage": "https://github.com/specs-feup/clava#readme",
   "dependencies": {
-    "@specs-feup/lara": "~3.5.0",
+    "@specs-feup/lara": "^4.0.0",
     "cytoscape": "^3.33.1"
   },
   "devDependencies": {
-    "@jest/globals": "^30.2.0",
     "@types/debug": "^4.1.12",
     "@types/java": "^0.9.6",
-    "@types/jest": "^30.0.0",
-    "@types/node": "^25.0.0",
+    "@types/node": "^24.0.0",
     "@types/yargs": "^17.0.35",
-    "cross-env": "^10.1.0",
-    "eslint": "^9.39.2",
-    "eslint-config-prettier": "^10.1.8",
-    "eslint-plugin-jest": "^29.12.1",
+    "@vitest/coverage-v8": "^4.1.10",
     "eslint-plugin-tsdoc": "^0.5.0",
-    "jest": "^30.2.0",
-    "node-notifier": "^10.0.1",
-    "ts-jest": "^29.4.6",
-    "typescript": "^6.0.3",
-    "typescript-eslint": "^8.52.0"
+    "oxfmt": "^0.59.0",
+    "oxlint": "^1.74.0",
+    "typescript": "^7.0.2",
+    "oxlint-tsgolint": "^7.0.2001",
+    "vitest": "^4.1.10"
   }
 }
diff --git a/Clava-JS/tsconfig.json b/Clava-JS/tsconfig.json
index 45c2114568..416c109338 100644
--- a/Clava-JS/tsconfig.json
+++ b/Clava-JS/tsconfig.json
@@ -6,7 +6,7 @@
     "strict": true,
     "isolatedModules": true,
     "allowSyntheticDefaultImports": true,
-    "types": ["node", "jest"],
+    "types": ["node", "vitest/globals"],
     "rewriteRelativeImportExtensions": true,
     "erasableSyntaxOnly": true,
     "verbatimModuleSyntax": true
diff --git a/Clava-JS/vitest.config.ts b/Clava-JS/vitest.config.ts
new file mode 100644
index 0000000000..8a6562ca7c
--- /dev/null
+++ b/Clava-JS/vitest.config.ts
@@ -0,0 +1,4 @@
+import { createWeaverVitestConfig } from "@specs-feup/lara/vitest/weaverVitestConfig.ts";
+import { weaverConfig } from "./code/WeaverConfiguration.ts";
+
+export default createWeaverVitestConfig(weaverConfig);
diff --git a/Clava-JS/vitest/ClavaLegacyTester.ts b/Clava-JS/vitest/ClavaLegacyTester.ts
new file mode 100644
index 0000000000..3b038339e5
--- /dev/null
+++ b/Clava-JS/vitest/ClavaLegacyTester.ts
@@ -0,0 +1,44 @@
+import ClavaJavaTypes, {
+  type ClavaJavaClasses,
+} from "../api/clava/ClavaJavaTypes.ts";
+
+import { WeaverLegacyTester } from "@specs-feup/lara/vitest/WeaverLegacyTester.ts";
+
+export class ClavaLegacyTester extends WeaverLegacyTester {
+  protected readonly WORK_FOLDER: string = "cxx_weaver_output";
+  private readonly standard: ClavaJavaClasses.Standard;
+  private readonly compilerFlags: string;
+
+  public constructor(
+    basePackage: string,
+    standard: ClavaJavaClasses.Standard,
+    compilerFlags: string = "",
+  ) {
+    super(basePackage);
+    this.standard = standard;
+    this.compilerFlags = compilerFlags;
+
+    this.set(ClavaJavaTypes.ClavaOptions.FLAGS, this.compilerFlags);
+  }
+
+  public async test(
+    laraResource: string,
+    ...codeResources: string[]
+  ): Promise<void> {
+    if (this.standard != null) {
+      this.set(ClavaJavaTypes.ClavaOptions.STANDARD, this.standard);
+    }
+
+    this.set(
+      ClavaJavaTypes.CxxWeaverOption.CHECK_SYNTAX,
+      this.checkWovenCodeSyntax,
+    );
+    this.set(ClavaJavaTypes.CxxWeaverOption.DISABLE_CLAVA_INFO, true);
+    this.set(ClavaJavaTypes.CxxWeaverOption.DISABLE_CODE_GENERATION);
+
+    // Enable parallel parsing
+    //this.set(ClavaJavaTypes.ParallelCodeParser.PARALLEL_PARSING);
+
+    await super.test(laraResource, ...codeResources);
+  }
+}
diff --git a/ClavaWeaver/build.gradle b/ClavaWeaver/build.gradle
index 1ff759a7e0..91128a6e1c 100644
--- a/ClavaWeaver/build.gradle
+++ b/ClavaWeaver/build.gradle
@@ -73,3 +73,36 @@ tasks.register('generateWeaver', JavaExec) {
 }
 
 compileJava.dependsOn generateWeaver
+
+def clavaWeaverInstallDir = layout.buildDirectory.dir('install/ClavaWeaver')
+def clavaJsJavaBinaries = layout.projectDirectory.dir('../Clava-JS/java-binaries')
+
+def syncClavaJsJavaBinaries = tasks.register('syncClavaJsJavaBinaries', Sync) {
+    group = 'distribution'
+    description = 'Synchronizes the ClavaWeaver installDist output used by Clava-JS.'
+    dependsOn tasks.named('installDist')
+    from clavaWeaverInstallDir
+    into clavaJsJavaBinaries
+
+    // The destination is also used by npm packaging and must not retain files
+    // that are no longer part of installDist.
+    outputs.upToDateWhen { false }
+
+    doFirst {
+        def installLib = clavaWeaverInstallDir.get().dir('lib').asFile
+        if (!installLib.isDirectory()) {
+            throw new GradleException("ClavaWeaver installDist output is missing: ${installLib}")
+        }
+
+        def destination = clavaJsJavaBinaries.asFile.toPath()
+        if (java.nio.file.Files.isSymbolicLink(destination)) {
+            java.nio.file.Files.delete(destination)
+        } else if (java.nio.file.Files.exists(destination) && !java.nio.file.Files.isDirectory(destination)) {
+            throw new GradleException("Clava-JS java-binaries is not a directory: ${destination}")
+        }
+    }
+}
+
+tasks.named('installDist') {
+    finalizedBy syncClavaJsJavaBinaries
+}