diff --git a/jkube-kit/jkube-kit-vertx/src/test/java/org/eclipse/jkube/vertx/generator/VertxGeneratorIsApplicableTest.java b/jkube-kit/jkube-kit-vertx/src/test/java/org/eclipse/jkube/vertx/generator/VertxGeneratorIsApplicableTest.java
index b4a575de21..38438b9af0 100644
--- a/jkube-kit/jkube-kit-vertx/src/test/java/org/eclipse/jkube/vertx/generator/VertxGeneratorIsApplicableTest.java
+++ b/jkube-kit/jkube-kit-vertx/src/test/java/org/eclipse/jkube/vertx/generator/VertxGeneratorIsApplicableTest.java
@@ -38,9 +38,10 @@ class VertxGeneratorIsApplicableTest {
 
   @BeforeEach
   void setUp() {
-    project = mock(JavaProject.class, Mockito.RETURNS_DEEP_STUBS);
-    context = mock(GeneratorContext.class, Mockito.RETURNS_DEEP_STUBS);
-    when(context.getProject()).thenReturn(project);
+    project = JavaProject.builder().build();
+    context = GeneratorContext.builder()
+            .project(project)
+            .build();
   }
 
   static Stream<Arguments> data() {
@@ -56,8 +57,9 @@ static Stream<Arguments> data() {
   @MethodSource("data")
   void isApplicable(String testDescription, List<Plugin> pluginList, List<Dependency> dependencyList, boolean expectedValue) {
     // Given
-    when(project.getPlugins()).thenReturn(pluginList);
-    when(project.getDependencies()).thenReturn(dependencyList);
+    context = context.toBuilder()
+            .project(project.toBuilder().plugins(pluginList).dependencies(dependencyList).build())
+            .build();
     // When
     final boolean result = new VertxGenerator(context).isApplicable(Collections.emptyList());
     // Then