Chandigarh: Punjab Chief Minister Amarinder Singh on Saturday tested negative for the coronavirus infection.This was the third time that the chief minister had got himself tested for Covid-19 since the outbreak of the pandemic.Singh also ended his week-long self-isolation after testing negative for the contagion.The CM had gone into seven-day self-quarantine on August 28 after he came in contact with two Congress legislators, Kulbir Singh Zira and Nirmal Singh, who had tested positive after the one-day Punjab Assembly session.Singh, who presided over a virtual meeting of ministers, Congress MLAs and senior officials, disclosed during the interaction that he had got himself tested on Saturday and was found negative, according to a government.