I wonder if we can do better than this, so as to be able to more quickly debug issues on foreign systems? If there is one error among many here, it will say something like "0.00001 is not greater or equal to 0.000231", and we won't immediately be able to tell which of the test values failed. If we write our own EXPECT_REL_ERROR macro that additionally prints out the expected and actual values on failure, I think we will be much happer in that scenario.