diff --git a/README.md b/README.md
index 08216c3..595c76f 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ The action has the following options:
 | `api_key`            | Datadog API key to use to upload the junit files.                                                                                                                                                                                                      | True     |                 |
 | `site`               | The Datadog site to upload the files to.                                                                                                                                                                                                               | False    | `datadoghq.com` |
 | `files`              | Path to file or folder containing XML files to upload                                                                                                                                                                                                  | False    | `.`             |
-| `auto-discovery`     | Do a recursive search and automatic XML files discovery in the folders provided in `files` input (current folder if omitted).                                                                                                                          | False    | `true`          |
+| `auto-discovery`     | Do a recursive search and automatic XML files discovery in the folders provided in `files` input (current folder if omitted). Search for filenames that match `*junit*.xml`, `*test*.xml`, `*TEST-*.xml`.                                              | False    | `true`          |
 | `ignored-paths`      | A comma-separated list of paths that are ignored when junit files auto-discovery is done. Glob patterns are supported.                                                                                                                                 | False    |                 |
 | `concurrency`        | Controls the maximum number of concurrent file uploads                                                                                                                                                                                                 | False    | `20`            |
 | `node-version`       | The node version to use to install the datadog-ci. It must be `>=14`                                                                                                                                                                                   | False    | `20`            |