diff --git a/backend/app/main.py b/backend/app/main.py
index 560daa4..3f46f00 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -109,15 +109,14 @@ async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
 )
 
 # --- Routes ---
-from app.api.routes import generate, health  # noqa: E402
+from app.api.routes import export, generate, health, styles  # noqa: E402
 
 app.include_router(generate.router, prefix="/api", tags=["generation"])
 app.include_router(health.router, tags=["health"])
 
 # Optional: register export and styles routes when ready
-# from app.api.routes import export, styles
-# app.include_router(export.router, prefix="/api", tags=["export"])
-# app.include_router(styles.router, prefix="/api", tags=["styles"])
+app.include_router(export.router, prefix="/api", tags=["export"])
+app.include_router(styles.router, prefix="/api", tags=["styles"])
 
 
 @app.get("/")
diff --git a/backend/tests/test_api.py b/backend/tests/test_api.py
index 150e0a9..c61e722 100644
--- a/backend/tests/test_api.py
+++ b/backend/tests/test_api.py
@@ -63,5 +63,14 @@ class TestExportEndpoint:
 
     def test_export_requires_job_id(self) -> None:
         """Should return 422 if job_id is missing."""
-        # TODO: Implement
-        pass
+        response = client.post("/api/export", json={"format": "png"})
+        assert response.status_code == 422
+
+        data = response.json()
+        assert "detail" in data
+
+        # Check that job_id is the missing field
+        missing_fields = [
+            error["loc"][-1] for error in data["detail"] if error["type"] == "missing"
+        ]
+        assert "job_id" in missing_fields