Prevent PRs from breaking Python 3 tests #3345
Merged
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New pull requests are breaking Python 3 pytests that are already passing. See: #3335 (comment) and #3081 (comment) This change ensures that Travis CI will fail the build when this happens. This is done in a way that allows all tests to be run on Python 3 but only those tests that have already been fixed will fail the build.
I would like to have this fast tracked because it is quite difficult and time consuming to clean up code after it has been landed.
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Testing
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