diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 95edb91c8..dde27a8ee 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -24,6 +24,7 @@ jobs:
         node-version: ${{ matrix.node-version }}
     - run: npm ci
     - run: npm run test
+    - run: npm run test:types
     - run: npm run check-formatting
     - run: npm run lint
     - run: npm run build
diff --git a/package.json b/package.json
index 00153a688..c2d34c73d 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
     "build:devtools-chrome": "node tools/devtools/build.mjs --browser=chrome --env=production",
     "build:devtools-firefox": "node tools/devtools/build.mjs --browser=firefox --env=production",
     "test": "npm run test -w packages/owl",
+    "test:types": "npm run test:types -w packages/owl",
     "test:doc-links": "vitest run --config tools/vitest.config.ts",
     "build:playground": "npm run build -w tools/playground",
     "build:site": "npm run build && npm run build:playground && node tools/site/assemble.mjs",
diff --git a/packages/owl/build.mjs b/packages/owl/build.mjs
index ffb1ca50c..c1588f645 100644
--- a/packages/owl/build.mjs
+++ b/packages/owl/build.mjs
@@ -72,7 +72,7 @@ async function buildCompiler() {
 function buildTypes() {
   mkdirSync("dist/types", { recursive: true });
   execSync(
-    "npx dts-bundle-generator --project tsconfig.json -o dist/types/owl.d.ts src/index.ts --no-banner",
+    "npx dts-bundle-generator --project tsconfig.build.json -o dist/types/owl.d.ts src/index.ts --no-banner",
     { stdio: "inherit" }
   );
 }
diff --git a/packages/owl/package.json b/packages/owl/package.json
index 5a6361816..e3b2d52b0 100644
--- a/packages/owl/package.json
+++ b/packages/owl/package.json
@@ -29,7 +29,8 @@
     "build": "npm run build:bundle",
     "build:types": "node build.mjs types",
     "test": "vitest run",
-    "test:watch": "vitest"
+    "test:watch": "vitest",
+    "test:types": "tsc"
   },
   "repository": {
     "type": "git",
diff --git a/packages/owl/tests/helpers.ts b/packages/owl/tests/helpers.ts
index e93f7d255..bba5deac0 100644
--- a/packages/owl/tests/helpers.ts
+++ b/packages/owl/tests/helpers.ts
@@ -277,9 +277,9 @@ expect.extend({
   },
 });
 
-export function nextAppError(app: any) {
-  let resolve: (value: any) => void;
-  const result = new Promise((res) => (resolve = res));
+export function nextAppError(app: any): Promise<Error> {
+  let resolve: (value: Error) => void;
+  const result = new Promise<Error>((res) => (resolve = res));
 
   const original = app._handleError;
   app._handleError = (error: any) => {
diff --git a/packages/owl/tsconfig.build.json b/packages/owl/tsconfig.build.json
new file mode 100644
index 000000000..d826016af
--- /dev/null
+++ b/packages/owl/tsconfig.build.json
@@ -0,0 +1,11 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "include": [
+    "src/**/*.ts",
+    "src/*.ts"
+  ],
+  "compilerOptions": {
+    "outDir": "dist",
+    "declarationDir": "dist/types"
+  }
+}
diff --git a/packages/owl/tsconfig.json b/packages/owl/tsconfig.json
index d826016af..f54f6ba90 100644
--- a/packages/owl/tsconfig.json
+++ b/packages/owl/tsconfig.json
@@ -2,10 +2,12 @@
   "extends": "../../tsconfig.base.json",
   "include": [
     "src/**/*.ts",
-    "src/*.ts"
+    "tests/**/*.ts"
   ],
   "compilerOptions": {
-    "outDir": "dist",
-    "declarationDir": "dist/types"
+    "noEmit": true,
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "types": ["node", "vitest/globals"]
   }
 }