diff --git a/.github/workflows/actions.yml b/.github/workflows/actions.yml
index 1cd2e578f..ec50abe08 100644
--- a/.github/workflows/actions.yml
+++ b/.github/workflows/actions.yml
@@ -29,6 +29,7 @@ jobs:
       run: |
         npm ci
         npm run build:clean
+        npm run validate-exports
     - name: Test
       if: success() || failure()
       shell: bash
diff --git a/package.json b/package.json
index 7dc63ea71..0b8df40d6 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
     "test": "vitest",
     "test-ui": "vitest --ui",
     "coverage": "vitest run --coverage",
+    "validate-exports": "npm run validate-exports --workspace=langium",
     "version:dependencies": "node ./scripts/update-version.js && npm install",
     "langium:generate": "npm run langium:generate --workspace=langium --workspace=examples/domainmodel --workspace=examples/arithmetics --workspace=examples/statemachine --workspace=examples/requirements",
     "dev-build": "npm run dev-clean && npm install && npm link ./packages/langium && npm link ./packages/langium-cli && npm link ./packages/generator-langium",
diff --git a/packages/langium/package.json b/packages/langium/package.json
index f3ae2bff5..8eaf6b6c6 100644
--- a/packages/langium/package.json
+++ b/packages/langium/package.json
@@ -52,6 +52,7 @@
     "build": "tsc",
     "watch": "tsc --watch",
     "lint": "eslint src test --ext .ts",
+    "validate-exports": "tsc -p test/tsconfig.export-main.json",
     "langium:generate": "langium generate",
     "langium:generate:production": "langium generate --mode=production",
     "publish:next": "npm --no-git-tag-version version \"$(semver $npm_package_version -i minor)-next.$(git rev-parse --short HEAD)\" && npm publish --tag next",
diff --git a/packages/langium/test/tsconfig.export-main.json b/packages/langium/test/tsconfig.export-main.json
new file mode 100644
index 000000000..b453a2326
--- /dev/null
+++ b/packages/langium/test/tsconfig.export-main.json
@@ -0,0 +1,10 @@
+// Validate the main package export by excluding parts of the code that shouldn't be directly linked
+{
+    "extends": "../tsconfig.src.json",
+    "compilerOptions": {
+      "noEmit": true
+    },
+    "exclude": [
+        "../src/test/**/*"
+    ]
+}