Seed method not called, Entity Framework 6

I have a DatabaseInitializer class

public class DatabaseInitializer : CreateDatabaseIfNotExists<DatabaseContext>
{
    protected override void Seed
        (
        DatabaseContext databaseContext
        )
    {
        // Seed the hash methods.
        var defaultHashMethod = new HashMethod
        {
            Description = "Default",
            CreateDate = DateTime.Now
        };

        databaseContext.HashMethod.Add(defaultHashMethod);

        databaseContext.SaveChanges();
    }
}

In my DatabaseContext class I set the initializer

public DatabaseContext() : base("DatabaseContext")
{
    InitializeDatabase();
}

private void InitializeDatabase()
{
    Database.SetInitializer(new DatabaseInitializer());
    if (!Database.Exists())
    {
        Database.Initialize(true);
    }            
}

As far as I can understand the seed method is only invoked once you perform an operation such as a query. My database is created successfully and I'm querying the table, but the seed method is never called.

Update:

It seems like the problem is caused because of a class that is inheriting from my DatabaseContext class, when using this class to perform database operations, the seed method is not called. When using my DatabaseContext class, everything works as expected

public DbSet<TestEntity> TestEntity { get; set; }

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
}