diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8df07ee..2ac686c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -36,8 +36,7 @@ jobs:
       - name: Build
         run: pnpm run build
 
-# Tests are not implemented yet
-      # - name: Test
-      #   run: pnpm run test
-      #   continue-on-error: true
+      # vscode-test launches a real VS Code instance, which needs a display on Linux.
+      - name: Test
+        run: xvfb-run -a pnpm run test
 
diff --git a/.vscodeignore b/.vscodeignore
index c6b00f0..1d69387 100644
--- a/.vscodeignore
+++ b/.vscodeignore
@@ -14,6 +14,7 @@ test-data/**
 .yarnrc
 vsc-extension-quickstart.md
 tsconfig.json
+tsconfig.test.json
 esbuild.js
 eslint.config.mjs
 pnpm-lock.yaml
diff --git a/.whitesource b/.whitesource
deleted file mode 100644
index 9c7ae90..0000000
--- a/.whitesource
+++ /dev/null
@@ -1,14 +0,0 @@
-{
-  "scanSettings": {
-    "baseBranches": []
-  },
-  "checkRunSettings": {
-    "vulnerableCheckRunConclusionLevel": "failure",
-    "displayMode": "diff",
-    "useMendCheckNames": true
-  },
-  "issueSettings": {
-    "minSeverityLevel": "LOW",
-    "issueType": "DEPENDENCY"
-  }
-}
\ No newline at end of file
diff --git a/README.md b/README.md
index 851ed9e..f352e67 100644
--- a/README.md
+++ b/README.md
@@ -63,3 +63,21 @@ Set the log level in VS Code settings:
 - Use `logger.warn()` for recoverable issues (e.g., 404s, validation warnings)
 - Use `logger.error()` for failures (e.g., server errors, exceptions)
 - Never use `showInformationMessage()` for routine operations—reserve for critical user notifications only
+
+### Testing
+
+```bash
+pnpm run test
+```
+
+`vscode-test` downloads and launches a real VS Code instance, so the tests need a display. On a
+headless machine (including CI) run them under `xvfb-run -a pnpm run test`.
+
+The `pretest` hook compiles the sources with `tsconfig.test.json`, which is the only place emit is
+configured: the main `tsconfig.json` is type-check only, so the test build overrides it to emit
+CommonJS into `out/`. `.vscode-test.mjs` then picks up `out/test/**/*.test.js`.
+
+### Dependency updates
+
+Renovate keeps dependencies current. `renovate.json` extends the org-wide preset in
+[`EduIDE/.github`](https://github.com/EduIDE/.github), so repo-local config stays minimal.
diff --git a/package.json b/package.json
index 7006224..0c2f8c8 100644
--- a/package.json
+++ b/package.json
@@ -47,8 +47,8 @@
         "watch:esbuild": "node esbuild.js --watch",
         "build": "pnpm run ts:check && pnpm run lint && node esbuild.js --production",
         "package": "vsce package --no-dependencies",
-        "compile-tests": "tsc -p . --outDir out",
-        "watch-tests": "tsc -p . -w --outDir out",
+        "compile-tests": "tsc -p ./tsconfig.test.json",
+        "watch-tests": "tsc -p ./tsconfig.test.json -w",
         "pretest": "pnpm run compile-tests && pnpm run compile && pnpm run lint",
         "ts:check": "tsc --noEmit",
         "ts:watch": "tsc --noEmit --watch --project tsconfig.json",
diff --git a/renovate.json b/renovate.json
new file mode 100644
index 0000000..b54e28f
--- /dev/null
+++ b/renovate.json
@@ -0,0 +1,5 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["local>EduIDE/.github:renovate-config"],
+  "postUpdateOptions": ["pnpmDedupe"]
+}
diff --git a/tsconfig.test.json b/tsconfig.test.json
new file mode 100644
index 0000000..88dbb83
--- /dev/null
+++ b/tsconfig.test.json
@@ -0,0 +1,16 @@
+{
+	/* The main tsconfig is type-check only (noEmit) and keeps the source module
+	   syntax as authored. vscode-test needs real CommonJS files on disk under
+	   out/, so the test build overrides just enough to emit them. */
+	"extends": "./tsconfig.json",
+	"compilerOptions": {
+		"noEmit": false,
+		"outDir": "out",
+		"module": "commonjs",
+		"moduleResolution": "node10",
+		"verbatimModuleSyntax": false,
+		/* Source files import each other with explicit .ts extensions; rewrite
+		   those to .js so the emitted requires resolve. */
+		"rewriteRelativeImportExtensions": true
+	}
+}