$ tar -cvpf travis_test_env.tar tests/etc/*.yml
tests/etc/commands.yml
tests/etc/responses.yml
tests/etc/test_devices.yml

$ tar -tvpf travis_test_env.tar
-rw-rw-r-- kbyers/kbyers  1776 2015-05-03 18:34 tests/etc/commands.yml
-rw-rw-r-- kbyers/kbyers  1423 2015-05-03 18:35 tests/etc/responses.yml
-rw-rw-r-- kbyers/kbyers   635 2015-05-15 11:01 tests/etc/test_devices.yml

$ travis login
We need your GitHub login to identify you.
This information will not be sent to Travis CI, only to api.github.com.
The password will not be displayed.

Try running with --github-token or --auto if you don't want to enter your password anyway.

$ mv travis_test_env.tar.enc travis_test_env.tar.enc_old
$ travis encrypt-file travis_test_env.tar
encrypting travis_test_env.tar for ktbyers/netmiko
storing result as travis_test_env.tar.enc
storing secure env variables for decryption

Please add the following to your build script (before_install stage in your .travis.yml, for instance):