**Historical thing that is not relevant anymore go to https://github.com/scikit-learn/scikit-learn/issues/8959#issuecomment-333104108 for the current problem**: ~~See https://travis-ci.org/scikit-learn/scikit-learn/jobs/237455099 for example.~~ ``` Expected: GaussianProcess(beta0=None, corr=<function squared_exponential at 0x...>, normalize=True, nugget=array(2.22...-15), ... Got: GaussianProcess(beta0=None, corr=<function squared_exponential at 0x2b0bb7aa5ae8>, normalize=True, nugget=array( 2.22045e-15), ... ``` Additional leading space in the repr of the `nugget` parameter.