# Testing with CSRFSpring Security also provides support for CSRF testing with `WebTestClient`.For example:Java```this.rest // provide a valid CSRF token .mutateWith(csrf()) .post() .uri("/login") ...```Kotlin```this.rest // provide a valid CSRF token .mutateWith(csrf()) .post() .uri("/login") ...```[Testing Authentication](authentication.html)[Testing OAuth 2.0](oauth2.html)