Skip to content
masterclass Buddy

FastAPI · Pipe

app.dependency_overrides

Use app.dependency_overrides to replace a FastAPI dependency during tests. The replacement function runs instead of the original one.

Last updated

Syntax

app.dependency_overrides[original_dependency] = override_dependency

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

Subscribe
  • FastAPI
  • Depends
  • TestClient
  • Testing Dependencies with Overrides

Source: Testing Dependencies with Overrides - FastAPI. Checked 2026-11-03.