add skyscreamer to core as test dependency
<artifactId>gson</artifactId>
<version>2.8.6</version>
</dependency>
+ <dependency>
+ <groupId>org.skyscreamer</groupId>
+ <artifactId>jsonassert</artifactId>
+ <version>1.5.0</version>
+ <scope>test</scope>
+ </dependency>
</dependencies>
<build>
