redis_client redis_client_tests.dart error on Linux/64 Redis 2.6.13

gistfile1.txt

unittest-suite-wait-for-done
Uncaught Error: Expected: '16.800000000000001'
  Actual: '16.8'
   Which: is different. Both strings start the same, but the given value is missing the following trailing characters: 0000000000 ...

Unhandled exception:
Expected: '16.800000000000001'
  Actual: '16.8'
   Which: is different. Both strings start the same, but the given value is missing the following trailing characters: 0000000000 ...

#0      _rootHandleUncaughtError.<anonymous closure>.<anonymous closure> (dart:async/zone.dart:677)
#1      _asyncRunCallback (dart:async/schedule_microtask.dart:18)
#2      _asyncRunCallback (dart:async/schedule_microtask.dart:21)
#3      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:119)
Stack Trace: 
#0      SimpleConfiguration.onExpectFailure (package:unittest/src/simple_configuration.dart:137:7)
#1      _ExpectFailureHandler.fail (package:unittest/src/simple_configuration.dart:15:28)
#2      DefaultFailureHandler.failMatch (package:unittest/src/expect.dart:117:9)
#3      expect (package:unittest/src/expect.dart:75:29)
#4      main.<anonymous closure>.<anonymous closure>.<anonymous closure>.<anonymous closure> (file:///home/tomek/projects/redis_client/test/redis_client_tests.dart:394:43)
#5      _Future._propagateToListeners.<anonymous closure> (dart:async/future_impl.dart:453)
#6      _rootRun (dart:async/zone.dart:683)
#7      _RootZone.run (dart:async/zone.dart:832)
#8      _Future._propagateToListeners (dart:async/future_impl.dart:445)
#9      _Future._complete (dart:async/future_impl.dart:303)
#10     _Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:354)
#11     _asyncRunCallback (dart:async/schedule_microtask.dart:18)
#12     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:119)