Error while running "ember test" inside ember addon - undefined is not an object (evaluating 'Ember.View.extend')

I am getting this error "undefined is not an object (evaluating 'Ember.View.extend')" when I run "ember test" inside my ember addon project.Used ember versions are as follows

Ember CLI Version : 1.13.1

Ember Version : 2.6.0

Ember CLI Qunit : 0.3.15.

I haven't used ember-data. Does the problem arise due to ember-cli version? Kindly guide me.