Why Spring @Qualifier does not work with Spock and Spring Boot

I'm trying to write a test for controller in the Spock.

@ContextConfiguration(loader = SpringApplicationContextLoader.class,
    classes = [Application.class, CreateUserControllerTest.class])
@WebAppConfiguration
@Configuration
class CreateUserControllerTest extends Specification {

    @Autowired
    @Qualifier("ble")
    PasswordEncryptor passwordEncryptor

    @Autowired
    UserRepository userRepository

    @Autowired
    WebApplicationContext context

    @Autowired
    CreateUserController testedInstance

    def "Injection works"() {
        expect:
        testedInstance instanceof CreateUserController
        userRepository != null
    }

    @Bean
    public UserRepository userRepository() {
        return Mock(UserRepository.class)
    }

    @Bean(name = "ble")
    PasswordEncryptor passwordEncryptor() {
        return Mock(PasswordEncryptor)
    }

}

Application class is just Spring Boot simplest config (enables autoscanning).It provides a with PasswordEncryptor. I want to replace this bean from Application with my bean providing a mock.

But unfortunately Spring throws a NoUniqueBeanDefinitionException:

Caused by: org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type [org.jasypt.util.password.PasswordEncryptor] is defined: expected single matching bean but found 2: provide,ble
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1054)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:533)
... 54 more

@Qualifier annotation seems not working at all. What can I do?