There is a problem with ByteArrayKey class and we get
java.lang.AssertionError: org/infinispan/util/ByteArrayKey
at org.testng.AssertJUnit.fail(AssertJUnit.java:59)
at org.testng.AssertJUnit.assertTrue(AssertJUnit.java:24)
at org.testng.AssertJUnit.assertFalse(AssertJUnit.java:41)
at org.infinispan.cli.interpreter.UpgradeTest.checkNoErrors(UpgradeTest.java:101)
at org.infinispan.cli.interpreter.UpgradeTest.testSynchronization(UpgradeTest.java:87)

In infinispan-cachestore-remote/pom.xml
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>infinispan-adaptor52x</artifactId>
<optional>true</optional> <<< this dependency is optional
</dependency>
So when test is running there is no ByteArrayKey under classpath and it fails