Millions of Ethiopians went to the polls on Sunday in parliamentary elections widely expected to give Prime Minister Meles Zenawi's ruling coalition a third five-year term. The polls, only the second real multi-party contest in Africa's top coffee producer, will test how democratic it has become since Prime Minister Meles Zenawi toppled dictator Mengistu Haile Mariam in 1991 ending 17 years of Marxist rule, Reuters said . Opposition parties advocating a bigger role for free markets in the Horn of Africa country of 72 million have set aside their ethnic differences for the first time, pledging to unite if it means winning a majority in the 547-seat national assembly. In Addis Ababa the stream of voters swelled throughout the morning at polling stations dotted among the capital's mist-shrouded hills as church services ended and worshippers turned up to cast their ballots.