decrease in unit test success in sonar - unit-testing

Recently i have upgraded sonar from 3.1.1 to 3.2.1. There is a decrease in unit test success leading to decrease in code coverage. In 3.1.1 there were no errors after unit test and 100%unit test success, but in 3.2.1 about 267 errors generated after test resulting 93% unit test success.
could someone tell me what to do to get 100%success in unit test?
thanks in advance.

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