JUnit Test Cases for Sling Models based on Delegation Pattern - Failing

Hi Everyone,

I followed all the steps mentioned in AEM Mock plugin for Core Component : https://github.com/adobe/aem-core-wcm-components/issues/1777
I am trying to write JUnits for the extended model of Core title component here and getting Error :

Caused by: org.apache.sling.testing.mock.osgi.ReferenceViolationException: Unable to inject mandatory reference 'externalizer' for class com.adobe.cq.wcm.core.components.internal.link.DefaultPathProcessor : no matching services were found.

Below is the code for the test class and related classes. 

@ExtendWith({AemContextExtension.class, MockitoExtension.class})
class TitleImplTest {

    public static final String COMPONENT_PATH = "component_path";
    public static final String COMPONENT_CONTENT_PATH = "content_path";

    public final static String PAGE_PATH = "page_path";
    private final AemContext ctx = AppAemContext.newAemContextForCore();

    private Title title;

    /**
     * Setup aem context with resource and models.
     */
    @BeforeEach
    void setUp() {
        // Load all sling models to AEM context
        ctx.addModelsForClasses(Title.class);
        // Load Page resource with component to context
        ctx.load().json("/models/TitleImplTest/TitleImplTest.json", PAGE_PATH);
        // Load Component to context for delegation pattern
        ctx.load().json("/models/TitleImplTest/Component.json", COMPONENT_PATH);
        // Set Current path to component under page
        ctx.currentResource(COMPONENT_CONTENT_PATH);

        // Adapt request to Sling Model
        title = ctx.request().adaptTo(Title.class);
    }

    /**
     * Test Title Impl methods.
     */
    @Test
    void testTitleImpl() {
        // Validate all fields/methods
        assertEquals("Explore Process Optimization", title.getText(), "Verify title text");
        assertFalse(title.enableAnchor(), "Verify anchor disabled");
        assertEquals("explore-process-optimization", title.getAnchorID(), "Verify anchor id");
        assertEquals("/jcr:content/root/responsivegrid/container/title", title.getMeta().getComponentRelativePath(), "Verify component relative path");
    }

public static AemContext newAemContextForCore() {
        return new AemContextBuilder().resourceResolverType(ResourceResolverType.JCR_MOCK)
                .plugin(CORE_COMPONENTS).build();
    }

@Delegate(types = com.adobe.cq.wcm.core.components.models.Title.class, excludes = Handled.class)
    @Self @Via(type = ResourceSuperType.class)
    private com.adobe.cq.wcm.core.components.models.Title delegate;

Could anyone please help here to fix the above issue. Thanks in advance!