I am trying to unit test a class which uses KafkaAvroDeserializer to deserialize an object. I would like to mock the KafkaAvroDeserializer so that I can test the business logic. However, when I am trying to mock KafkaAvroDeserializer, I get the following error:

org.mockito.exceptions.base.MockitoException:
Mockito cannot mock this class: class io.confluent.kafka.serializers.KafkaAvroDeserializer.

error-log-1

error-log-2

error-log-3

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Jdk: OpenJdk17

Gradle configuration

testImplementation 'org.mockito:mockito-junit-jupiter:2.23.0'
    testImplementation 'org.mockito:mockito-core:2.23.4'
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.0'
    testImplementation 'net.javacrumbs.json-unit:json-unit:1.30.0'
    testImplementation(
            'org.mockito:mockito-core:2.22.0',
            "io.opentracing:opentracing-mock:0.31.0"
    )
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.6.0'