Is there a word for the beliefs of Baptists?

The beliefs of Catholics are Catholicism; the beliefs of Lutherans are Lutheranism; the beliefs of Presbyterians are Presbyterianism; etc. What about the beliefs of Baptists? It "should" be "Baptism," but that would be confusing. "Baptistism" is more understandable, but sounds wrong ("-ist" changes to "-ism"; they aren't normally combined).