Mockito cannot mock this class:.. Java 11

[TheGitHubGuy1]

gradle.build

// **Testing**
testCompileOnly 'org.projectlombok:lombok:1.18.12'
testCompile "org.testcontainers:junit-jupiter:1.14.1"
testCompile "org.testcontainers:testcontainers:1.14.1"
testCompile "org.testcontainers:postgresql:1.14.1"
testAnnotationProcessor platform("io.micronaut:micronaut-bom:1.3.6")
testAnnotationProcessor "io.micronaut:micronaut-inject-java"
testAnnotationProcessor "org.projectlombok:lombok:1.18.12"
testImplementation platform("io.micronaut:micronaut-bom:1.3.6")
testImplementation "org.junit.jupiter:junit-jupiter-api"
testImplementation "io.micronaut.test:micronaut-test-junit5"
// Mockito
testImplementation "org.mockito:mockito-junit-jupiter:2.22.0"
testRuntime "org.junit.jupiter:junit-jupiter-engine:5.1.0"

Error instantiating bean of type x.x.x
Mockito cannot mock this class: x.x.x

Java               : 11
JVM vendor name    : JetBrains s.r.o
JVM vendor version : 11.0.4+10-b304.77
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 11.0.4+10-b304.77
JVM info           : mixed mode
OS name            : Linux
OS version         : 5.3.0-53-generic

Refers to instances of @MockBean

    @MockBean(X.class)
       X x(){
        return mock(X.class);
    }

Works with Java8

openjdk version "1.8.0_252"
OpenJDK Runtime Environment (build 1.8.0_252-8u252-b09-1~18.04-b09)
OpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)

Suspect related to mockito-core version being < 2.22 after a little googling.
Imported testCompile group: 'org.mockito', name: 'mockito-core', version: '2.22.0
Didn't resolve the issue

[TheGitHubGuy1]

Looks like upgrading to latest mockito-junit-jupiter updated mockito-core to 3.3.3 too.

// https://mvnrepository.com/artifact/org.mockito/mockito-junit-jupiter
testCompile group: 'org.mockito', name: 'mockito-junit-jupiter', version: '3.3.3'

Solved it for me