tests: Fix print_exception test and re-enable it on Travis CI.

Issue was with uPy: on local machine with micropython-lib installed, io
module is available.  Not the case on Travis CI, where only _io module
is available in uPy.

1 files changed, 0 insertions, 1 deletions

diff --git a/tests/run-tests b/tests/run-tests
index 801fb897c..fd41931d3 100755
--- a/tests/run-tests
+++ b/tests/run-tests
@@ -60,7 +60,6 @@ def run_tests(pyb, tests, args):
     # Some tests shouldn't be run under Travis CI
     if os.getenv('TRAVIS') == 'true':
         skip_tests.add('basics/memoryerror.py')
-        skip_tests.add('misc/print_exception.py')
 
     # Some tests shouldn't be run on pyboard
     if pyb is not None: