The following github links helped in fixing the issue up, all I had to do was to upgrade the powermock-api version to 2.0.0-beta.5 to make it work properly with mockito2.

https://github.com/mockito/mockito/issues/1207

https://github.com/powermock/powermock/wiki/Mockito#introduction

https://github.com/mockito/mockito/issues/292

<dependency>

    <groupId>org.powermock</groupId>

    <artifactId>powermock-core</artifactId>

    <version>2.0.0-RC.4</version>

    <scope>test</scope>

    </dependency>

<dependency>

    <groupId>org.powermock</groupId>

    <artifactId>powermock-module-junit4</artifactId>

    <version>2.0.0-beta.5</version>

    <scope>test</scope>

</dependency>

<dependency>

    <groupId>org.powermock</groupId>

    <artifactId>powermock-api-mockito2</artifactId>

    <version>2.0.0-beta.5</version>

    <scope>test</scope>

</dependency>

<dependency>

    <groupId>cglib</groupId>

    <artifactId>cglib</artifactId>

    <version>3.2.9</version>

</dependency>

<dependency>

    <groupId>org.mockito</groupId>

    <artifactId>mockito-inline</artifactId>

    <version>2.15.0</version>

</dependency>