Jasmine test for Angular service does not resolve deferred call

I'm pretty new to Angular and I am working to test an Angular service that runs off an API level service which wraps a bunch of calls to a REST service. Because it is working with HTTP requests, both parts of the service are working with promises and it seems to work fine, but I am having trouble getting any tests of promised behaviour working.

The relevant part of my service code ( grossly simplified ) looks like this:

angular.module('my.info')
 .service('myInfoService', function (infoApi, $q) {
    infoLoaded: false,
    allInfo: [],
    getInfo: function () {
        var defer = $q.defer();
        if (infoLoaded) {
            defer.resolve(allInfo);
        } else {
            infoApi.getAllInfo().then(function (newInfo) {
                allInfo = newInfo;
                infoLoaded = true;
                defer.resolve(allInfo);
            });
        }
        return defer.promise;
    }
});

When I am setting up my mock I have something like this:

   describe("Info Service ",
     function() {
        var infoService, infoRequestApi, $q;
        beforeEach(module("my.info"));
        beforeEach(function() {
            module(function($provide) {
                infoRequestApi = {
                   requestCount: 0,
                   getAllInfo: function() {
                       var defer = $q.defer(); 
                       this.requestCount++;
                       defer.resolve( [ "info 1", "info 2" ] );
                       return defer.promise;
                   }
                };
                $provide.value("infoApi", infoRequestApi);
            });
            inject(function( _myInfoService_, _$q_ ) {
                 infoService = _myInfoService_,
                 $q = _$q_;
            });
        });

        it("should not fail in the middle of a test", function(done) {
            infoService.getInfo().then( function(infoResult) {
                  // expectation checks.
                  expect( true ).toBeTrue();
              }).finally(done);
        });
   });

Any synchronous tests pass fine, but when I try to run any tests like this I get a message saying: Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL.

It seems as though something about the way that Angular.Mocks handles the deferred result is causing it to fail. When I step through the test, the mock object's defer variable is being set correctly, but the then statement in the service is never called. Where am I going wrong?