Karma WARN [web-server] error for endpoint

When I run my karma tests, I keep getting the following WARN errors.

WARN [web-server]: 404: /api/my_example_endpoint
WARN [web-server]: 404: /api/my_example_endpoint
WARN [web-server]: 404: /api/my_example_endpoint
WARN [web-server]: 404: /api/my_example_endpoint

This my_example_endpoint is being called from a UI-router resolve for all views. Something like...

  .state('global', {
      abstract: true,
      resolve: {
        exampleResolve: function(MyExampleService) {
          // this calls the '/api/my_example_endpoint' endpoint
          return MyExampleService.getGlobalData();
        }
      },
      //....
    })

How can I fix this WARN error?