2 files declare their use of PasswordInterface

PasswordItemTest.php in core/tests/Drupal/KernelTests/Core/Field/FieldType/PasswordItemTest.php
PhpPasswordTest.php in core/tests/Drupal/Tests/Core/Password/PhpPasswordTest.php

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.