[PyTorch-nightly-test] Fix Wav2Vec2 LM & Phoneme tests
Author: patrickvonplaten
Pull request: yes

# What does this PR do?

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## Before submitting
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Comments:
_The documentation is not available anymore as the PR was closed or merged._

Hey @patrickvonplaten, could you write a description in the PR on why the change is needed?

Thanks for the careful review @stas00 !