dependencies {
    ...
    testCompile "com.amazonaws:DynamoDBLocal:1.11.477"
}

task copyDependencies(type: Copy) {
    from(configurations.compile + configurations.testCompile) {
        include '*.dll'
        include '*.dylib'
        include '*.so'
    }
    into 'build/libs'
}

test {
    dependsOn copyDependencies
    systemProperty 'sqlite4java.library.path', 'build/libs'
    useJUnitPlatform()
}