Integration test fails when using @MockBean which is type ObjectMapper

I have an integration test as per the screenshot below where I am trying to mock the methods for ObjectMapper.
After implementing spring hateos this no longer works and returns an error. I've tried changing this to a @SpyBean but this didn't work either. The only workaround I can think of is creating a test configuration and passing the object mapper (mocked) to the class being tested which would require overriding the bean which I really don't want to do as it looks messy.

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hypermediaWebMvcConverters' defined in class path resource [org/springframework/hateoas/config/HateoasConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.config.WebConverters]: Factory method 'hypermediaWebMvcConverters' threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:656) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:636) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1338) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1290) at org.springframework.beans.factory.support.DefaultListableBeanFactory$DependencyObjectProvider.getObject(DefaultListableBeanFactory.java:1884) at org.springframework.hateoas.config.RestTemplateHateoasConfiguration$HypermediaRestTemplateBeanPostProcessor.postProcessBeforeInitialization(RestTemplateHateoasConfiguration.java:68) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:416) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1788) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ... 133 more Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.config.WebConverters]: Factory method 'hypermediaWebMvcConverters' threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:651) ... 149 more Caused by: java.lang.NullPointerException at org.springframework.hateoas.mediatype.hal.HalMediaTypeConfiguration.configureObjectMapper(HalMediaTypeConfiguration.java:84) at org.springframework.hateoas.config.WebConverters.lambda$new$0(WebConverters.java:50) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578) at org.springframework.hateoas.config.WebConverters.<init>(WebConverters.java:51) at org.springframework.hateoas.config.WebConverters.of(WebConverters.java:67) at org.springframework.hateoas.config.HateoasConfiguration.hypermediaWebMvcConverters(HateoasConfiguration.java:79) at org.springframework.hateoas.config.HateoasConfiguration$$EnhancerBySpringCGLIB$$88358704.CGLIB$hypermediaWebMvcConverters$1(<generated>) at org.springframework.hateoas.config.HateoasConfiguration$$EnhancerBySpringCGLIB$$88358704$$FastClassBySpringCGLIB$$9d36ce51.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331) at org.springframework.hateoas.config.HateoasConfiguration$$EnhancerBySpringCGLIB$$88358704.hypermediaWebMvcConverters(<generated>) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ... 150 more

Start by reproducing the integration test shown in the issue, then inspect HalMediaTypeConfiguration.java, WebConverters.java, and HateoasConfiguration.java at the stack-trace locations. Determine why an @MockBean ObjectMapper causes hypermediaWebMvcConverters to fail, and add a regression test showing that the integration context starts successfully with the mock.