> For the complete documentation index, see [llms.txt](https://cover-docs.diffblue.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cover-docs.diffblue.com/features/output-codes/v-validation-codes.md).

# V - Validation Codes

## Introduction

These output codes are associated with validation checks performed on the tests created by Diffblue Cover, to ensure they run without any issues.

### V003 - Tests discarded during validation

Tests were discarded during the validation stage where the created tests are run in a realistic test environment. See [Working with code V003](https://docs.diffblue.com/knowledge-base/troubleshooting/resolving-code-v003/) for more information.