diff --git a/jkube-kit/helm/src/test/java/org/eclipse/jkube/kit/resource/helm/ChartTest.java b/jkube-kit/helm/src/test/java/org/eclipse/jkube/kit/resource/helm/ChartTest.java
index cdb6d8122c..27da39a6df 100644
--- a/jkube-kit/helm/src/test/java/org/eclipse/jkube/kit/resource/helm/ChartTest.java
+++ b/jkube-kit/helm/src/test/java/org/eclipse/jkube/kit/resource/helm/ChartTest.java
@@ -57,7 +57,7 @@ void deserialize() throws Exception {
         .hasFieldOrPropertyWithValue("home", "e.t.")
         .hasFieldOrPropertyWithValue("version", "1337")
         .hasToString("Chart{name='chart', home='e.t.', version='1337'}")
-        .extracting("sources").asList().containsExactly("source");
+        .extracting("sources").asInstanceOf(InstanceOfAssertFactories.list(String.class)).containsExactly("source");
   }
 
   @Test