diff --git a/com.avaloq.tools.ddk.xtext.test.core/src/com/avaloq/tools/ddk/xtext/test/jupiter/AbstractScopingTest.java b/com.avaloq.tools.ddk.xtext.test.core/src/com/avaloq/tools/ddk/xtext/test/jupiter/AbstractScopingTest.java
index 4d3d271fb9..87b0c5b684 100644
--- a/com.avaloq.tools.ddk.xtext.test.core/src/com/avaloq/tools/ddk/xtext/test/jupiter/AbstractScopingTest.java
+++ b/com.avaloq.tools.ddk.xtext.test.core/src/com/avaloq/tools/ddk/xtext/test/jupiter/AbstractScopingTest.java
@@ -19,6 +19,7 @@
 import static com.avaloq.tools.ddk.xtext.resource.AbstractSelectorFragmentProvider.VALUE_SEP;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
@@ -856,7 +857,7 @@ protected EObject getCrossReferencedObject(final int sourceTag, final boolean tr
     EReference reference = (EReference) context.eClass().getEStructuralFeature(featureName);
     if (reference.isMany()) {
       Object featureValue = context.eGet(reference, false);
-      assertTrue(featureValue instanceof EObjectResolvingEList, "List must be of type EObjectResolvingEList"); //$NON-NLS-1$
+      assertInstanceOf(EObjectResolvingEList.class, featureValue, "List must be of type EObjectResolvingEList"); //$NON-NLS-1$
       @SuppressWarnings("unchecked")
       EList<? extends EObject> objects = (EObjectResolvingEList<? extends EObject>) context.eGet(reference, false);
       if (objects.size() == 1) {