In SpringBoot 3.3 @SpyBean can able to mock and spy but after upgrading to Springboot 3.4 @MockitoSpyBean can able to spy but cannot able to mock

[JavaDevaraj]

In springboot 3.3

@SpyBean
private ReprocessBackOffImpl reprocessBackOffImpl;
doThrow(exception).when(reprocessBackOffImpl).assertPreConditions(context);

Its working fine....

but after upgrading to Springboot 3.4

@MockitoSpyBean
private ReprocessBackOffImpl reprocessBackOffImpl;

doThrow(exception).when(reprocessBackOffImpl).assertPreConditions(context);

getting below exception

Argument passed to when() is not a mock! 
Example of correct stubbing: 
doThrow(new RuntimeException()).when(mock).someMethod(); 
org.mockito.exceptions.misusing.NotAMockException:  Argument passed to when() is not a mock! 

[bclozel]

Duplicates spring-projects/spring-framework#34516
Please avoid cross-posting and wasting contributor's time.