How can I reference a profile in a Salesforce test class?

 I'm doing it as follows: `ProfileId = [SELECT Id FROM Profile WHERE Name = 'Comercial' LIMIT 1].Id`, but it is returning the error: `System.DmlException: Update failed. First exception on row 7 with id 005Kj00000AvzLaIAJ; first error: INSUFFICIENT_ACCESS_OR_READONLY, Cannot insert a user with this profile: []`. 

(That's all my user fields)  User testUser = new User(

            LastName = 'Test User',

            Email = 'testuser@test.com',

            Username = 'testuser@test.com' + System.currentTimeMillis(),

            Alias = 'testu',

            TimeZoneSidKey = 'America/Sao_Paulo',

            LocaleSidKey = 'pt_BR',

            EmailEncodingKey = 'UTF-8',

            ProfileId = [SELECT Id FROM Profile WHERE Name != 'Administrador do Sistema' limit 1].Id,       

            LanguageLocaleKey = 'pt_BR',

            UserRoleId = role.Id,

            Aprovacao_Disponivel_Novo__c = 10,

            Aprova_o_Disponivel_Seminovo__c = 20

        );

        insert testUser;

  How can I fix it?