If you are using OpenAthens Keystone
Your own OpenAthens accounts can be used for testing as long as you have enabled 'users from my domain' on your connection. It is set to on by default on creation, but if it is not already on: toggle the switch and save. Changes are almost instant for OpenAthens Keystone.
To add additional IdPs before you are live, enable the additional identity providers option on your connection and add their metadata.
If you are using other software (e.g. Shibboleth)
To test with your own OpenAthens accounts, you will need to add their metadata to your system: https://login.openathens.net/saml/2/metadata-idp/YOUR_OPENATHENS_DOMAIN.
This is our managed directory product and in normal operation should be the only type of IdP you encounter in the OpenAthens federation. As well as your own OpenAthens accounts our service desk can supply you with credentials for an additional IdP:
Metadata address: https://login.openathens.net/saml/2/metadata-idp/sd.openathens.net
Our service desk will need to add your metadata at our end before they pass you the details.
Testing by the OpenAthens Service Desk
When you submit your site for publication in the metadata our service desk will run some tests based on the and our to make sure things will work well for our mutual customers. To avoid delays, you should pre-enable access for their test accounts.
See also: Getting production ready