Check if you're running with seeAllData = true

CheckSeeAllData.cls

@isTest
    public static void it_should_say_seeall_is_false() {
        Boolean seeAllData = true;
        try {
            ConnectApi.UserProfiles.getUserProfile(null, UserInfo.getUserId());
        } catch (UnsupportedOperationException ex) {
            seeAllData = false;
        }
        System.assert(!seeAllData, 'See All data returned true');
    }

    @isTest(seeAllData=true)
    public static void it_should_say_seeall_is_true() {
        Boolean seeAllData = true;
        try {
            ConnectApi.UserProfiles.getUserProfile(null, UserInfo.getUserId());
        } catch (UnsupportedOperationException ex) {
            seeAllData = false;
        }
        System.assert(seeAllData, 'See All data returned false');
    }