I apply both these tests to school yard snow removal auctions in the City of Helsinki and find some evidence of collusion. Both the tests suggests collusion. Moreover the analyzed firms do not behave strategically as we would expect in the competitive setting. Two bidders seem to participate in a contract allocation scheme. According to descriptive evidence, the collusive regime seems to last only the year 2003. However due to possible endogeneity problems and problems in the numerical optimization, these results should be treated with caution. Still, this analysis should validate closer legal study to support the prosecution of these two companies.