CakePHP 3: Plugin and test cases + Travis build is failing

Hello,

I am learning the plugin development and making it available via composer.

Here is my code: https://github.com/narendravaghela/cakephp-remember-me

Here is Travis build: https://travis-ci.org/narendravaghela/cakephp-remember-me/jobs/124758432

All tests are getting passed on my local machine. But, when I run Travis build, it shows errors.

Can someone please help on this?

Thanks in advance.

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