NoClassDefFoundError when running test in project with classifiers

VSCode version: 1.37.0
Java Test Runner version: 0.19.0

The workspace contains two projects, i.e. A and B. Project A depends on Project B.

When executing an unit test of Project A, the test failed due to a missing Java class definition from Project B.

Caused by: java.lang.NoClassDefFoundError: a/b/c/d/e/exception/InvalidTokenException
	at a.b.c.d.f.g.registrationService(g.java:27)
	at a.b.c.d.f.g$$EnhancerBySpringCGLIB$$db27a38.CGLIB$registrationService$0(<generated>)
	at a.b.c.d.f.g$$EnhancerBySpringCGLIB$$db27a38$$FastClassBySpringCGLIB$$df65555.invoke(<generated>)
	at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:355)
	at a.b.be.d.f.g$$EnhancerBySpringCGLIB$$db27a38.registrationService(<generated>)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
	... 39 more
Caused by: java.lang.ClassNotFoundException: a.b.c.d.e.exception.InvalidTokenException
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 50 more

When browsing the dependency of Project A using Java Dependency Viewer, Project B is missing from Maven Dependencies.

If I remove Project B from the workspace, Project B re-appears in the dependency list under Maven Dependencies. At this moment, the test runs perfectly fine without any issue.

I am not sure whether there are some issues on resolving classpath in mutli-project workspace.

Reproduce the failure in the described two-project workspace, then inspect Project A in Java Dependency Viewer while Project B is present or removed. Done means Project B remains in Maven Dependencies and Project A's unit test runs without the NoClassDefFoundError; the issue names no repository files or tests to inspect.