Unable to run qunit tests for SAP UI5 applications

[hpooj93]

Gruntfile consists:

module.exports = function (grunt) {
    'use strict';
    grunt.initConfig({
        qunit: {
            all: ['/webapp/test/unit/unitTests.qunit.html']
        }
    });
	grunt.loadNpmTasks('grunt-contrib-qunit');
         grunt.registerTask('default', ['qunit']);
};

QUnit runs but not able to read the test cases as it shows zero test cases.