anchor.diff:              yield!
                   offsets
                   |> List.map (fun (offset, _) ->
  -                    // ensure offset isn't local offset -> doesn't throw
  -                    let offset =
  -                        if offset = localOffset then
  -                            // adjust towards 0, otherwise might get out of range (+/- 14h)
  -                            if offset.TotalHours < 0.0 then
  -                                offset.Add(TimeSpan.FromMinutes(1.0))
  -                            else
  -                                offset.Subtract(TimeSpan.FromMinutes(1.0))
  -                        else
  -                            offset
  -                    (offset, shouldThrowUTCOffsetAndLocalDateTimeDontMatch)
  +                    // offset = local offset doesn't throw
  +                    if offset = localOffset then
  +                        // don't adjust to throw: generated test name might conflict with other test case
  +                        // instead emit succeeding test to keep test count same
  +                        // -> same as single testCase below (`offset = localOffset (...) succeeds`)
  +                        (offset, shouldSucceed)
  +                    else
  +                        (offset, shouldThrowUTCOffsetAndLocalDateTimeDontMatch)
                   )
                   |> withCtor fromLocalDateTime
                   |> List.map toTestCase
  
positive.code: 
                  // positive range
                  TimeSpan.FromMinutes(30.0), shouldSucceed
                  TimeSpan.FromHours(1.0), shouldSucceed
                  TimeSpan.FromHours(2.0), shouldSucceed
                  TimeSpan(13, 59, 0), shouldSucceed
                  TimeSpan.FromHours(14.0), shouldSucceed
  
negative.code: 
                  // negative range
                  TimeSpan.FromMinutes(-30.0), shouldSucceed
                  TimeSpan.FromHours(-2.0), shouldSucceed
                  TimeSpan(-13, -59, 0), shouldSucceed
                  TimeSpan.FromHours(-14.0), shouldSucceed
  