Tests fail on jenkins

[sta-szek]

One test is failing when running on jenkins.
Problem might be with assertj's is(condition) method. Jenkins tries to compare ClassAndFieldPredicatePair to ClassAndFieldPredicatePairCondition class.

It seems that is(...) method works on jenkins as isInstanceOf(...)

Test does not fail locally, on teamcity and travis.

Failures (1):
  JUnit Jupiter:AssertionsTest:Should_Create_Expected_Multi_Class_Assertion_Using_Package()
    MethodSource [className = 'pl.pojo.tester.api.assertion.AssertionsTest', methodName = 'Should_Create_Expected_Multi_Class_Assertion_Using_Package', methodParameterTypes = '']
    => java.lang.AssertionError: 
Expecting:
 <pl.pojo.tester.api.ClassAndFieldPredicatePair@3f49e266>
to be <ClassAndFieldPredicatePairCondition>

Test run finished after 5086 ms
[       163 containers found      ]
[         0 containers skipped    ]
[       163 containers started    ]
[         0 containers aborted    ]
[       163 containers successful ]
[         0 containers failed     ]
[       911 tests found           ]
[         0 tests skipped         ]
[       911 tests started         ]
[         0 tests aborted         ]
[       910 tests successful      ]
[         1 tests failed          ]

:junitPlatformTest FAILED