diff --git a/tests/unit/app/__init__.py b/tests/unit/app/__init__.py
new file mode 100644
index 00000000..57c0f58e
--- /dev/null
+++ b/tests/unit/app/__init__.py
@@ -0,0 +1 @@
+"""Init of tests/unit/app."""
diff --git a/tests/unit/app/test_routers.py b/tests/unit/app/test_routers.py
new file mode 100644
index 00000000..59b575c0
--- /dev/null
+++ b/tests/unit/app/test_routers.py
@@ -0,0 +1,32 @@
+"""Unit tests for routers.py."""
+
+from app.routers import include_routers  # noqa:E402
+
+from app.endpoints import root, info, models, query, health, config  # noqa:E402
+
+
+class MockFastAPI:
+    """Mock class for FastAPI."""
+
+    def __init__(self):
+        """Initialize mock class."""
+        self.routers = []
+
+    def include_router(self, router, prefix=None):
+        """Register new router."""
+        self.routers.append(router)
+
+
+def test_include_routers():
+    """Test the function include_routers."""
+    app = MockFastAPI()
+    include_routers(app)
+
+    # are all routers added?
+    assert len(app.routers) == 6
+    assert root.router in app.routers
+    assert info.router in app.routers
+    assert models.router in app.routers
+    assert query.router in app.routers
+    assert health.router in app.routers
+    assert config.router in app.routers