Use the specified filter to select tests to run based on filter criteria. You can use the format Operator to construct your ...

Use the specified filter to select tests to run based on filter criteria.  You can use the format Operator to construct your filter where Operator is one of =, != or ~ (Operator ~ has 'contains' semantics and is applicable for string properties like DisplayName).  You can also use the logical operator |, to construct your filter and parenthesis () for grouping.  For example, (FullyQualifiedName~Nightly|Name=MyTestMethod)