diff --git a/jkube-kit/enricher/api/src/test/java/org/eclipse/jkube/kit/enricher/api/util/KubernetesResourceUtilTest.java b/jkube-kit/enricher/api/src/test/java/org/eclipse/jkube/kit/enricher/api/util/KubernetesResourceUtilTest.java
index 01022eed1f..5a42183664 100644
--- a/jkube-kit/enricher/api/src/test/java/org/eclipse/jkube/kit/enricher/api/util/KubernetesResourceUtilTest.java
+++ b/jkube-kit/enricher/api/src/test/java/org/eclipse/jkube/kit/enricher/api/util/KubernetesResourceUtilTest.java
@@ -17,6 +17,7 @@
 import io.fabric8.kubernetes.api.model.ConfigMapBuilder;
 import io.fabric8.kubernetes.api.model.Container;
 import io.fabric8.kubernetes.api.model.ContainerBuilder;
+import io.fabric8.kubernetes.api.model.ContainerPort;
 import io.fabric8.kubernetes.api.model.EnvVarBuilder;
 import io.fabric8.kubernetes.api.model.HasMetadata;
 import io.fabric8.kubernetes.api.model.KubernetesListBuilder;
@@ -130,7 +131,8 @@ void mergePodSpec_withFragmentWithContainerNameAndSidecarDisabled_shouldPreserve
         .hasFieldOrPropertyWithValue("name", "demo")
         .hasFieldOrPropertyWithValue("image", "spring-boot-test:latest")
         .hasFieldOrPropertyWithValue("args", Collections.singletonList("/usr/local/s2i/run"))
-        .extracting("ports").asList().extracting("containerPort")
+        .extracting("ports").asInstanceOf(InstanceOfAssertFactories.list(ContainerPort.class))
+        .extracting("containerPort")
         .containsExactly(8080, 9779, 8778);
   }