Lat fix for Ray HP search

[sgugger]

No description provided.

[LysandreJik]

Yes!

[codecov]

Codecov Report

Merging #6691 into master will increase coverage by 0.48%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #6691      +/-   ##
==========================================
+ Coverage   78.95%   79.44%   +0.48%     
==========================================
  Files         156      156              
  Lines       28384    28386       +2     
==========================================
+ Hits        22412    22551     +139     
+ Misses       5972     5835     -137     

Impacted Files	Coverage Δ
src/transformers/trainer.py	50.73% <0.00%> (-0.17%)	⬇️
src/transformers/modeling_tf_xlnet.py	21.12% <0.00%> (-71.05%)	⬇️
src/transformers/modeling_tf_flaubert.py	24.53% <0.00%> (-63.81%)	⬇️
src/transformers/modeling_roberta.py	77.37% <0.00%> (-19.71%)	⬇️
src/transformers/modeling_utils.py	88.05% <0.00%> (+0.55%)	⬆️
src/transformers/modeling_tf_utils.py	86.64% <0.00%> (+1.95%)	⬆️
src/transformers/generation_tf_utils.py	86.46% <0.00%> (+2.50%)	⬆️
src/transformers/configuration_t5.py	96.42% <0.00%> (+10.71%)	⬆️
src/transformers/modeling_t5.py	83.83% <0.00%> (+12.21%)	⬆️
src/transformers/modeling_tf_t5.py	90.93% <0.00%> (+64.09%)	⬆️
... and 1 more

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