Update readme and prevent backoff from throwing L1 exceptions

[ChrisTho23]

No description provided.

[ChrisTho23]

Test file was renamed but exemplary test comment in readme not

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}