diff --git a/bundles/tools.vitruv.framework.vsum/src/tools/vitruv/framework/vsum/internal/ResourceRepositoryImpl.java b/bundles/tools.vitruv.framework.vsum/src/tools/vitruv/framework/vsum/internal/ResourceRepositoryImpl.java
index 3631d08ba..91810bd31 100644
--- a/bundles/tools.vitruv.framework.vsum/src/tools/vitruv/framework/vsum/internal/ResourceRepositoryImpl.java
+++ b/bundles/tools.vitruv.framework.vsum/src/tools/vitruv/framework/vsum/internal/ResourceRepositoryImpl.java
@@ -1,6 +1,5 @@
 package tools.vitruv.framework.vsum.internal;
 
-import static com.google.common.base.Preconditions.checkState;
 import static edu.kit.ipd.sdq.commons.util.org.eclipse.emf.ecore.resource.ResourceSetUtil.getOrCreateResource;
 import static edu.kit.ipd.sdq.commons.util.org.eclipse.emf.ecore.resource.ResourceSetUtil.loadOrCreateResource;
 import static edu.kit.ipd.sdq.commons.util.org.eclipse.emf.ecore.resource.ResourceSetUtil.withGlobalFactories;
diff --git a/bundles/tools.vitruv.testutils.vsum/src/tools/vitruv/testutils/DefaultVirtualModelBasedTestView.xtend b/bundles/tools.vitruv.testutils.vsum/src/tools/vitruv/testutils/DefaultVirtualModelBasedTestView.xtend
index 1427c79ba..21b0c31a1 100644
--- a/bundles/tools.vitruv.testutils.vsum/src/tools/vitruv/testutils/DefaultVirtualModelBasedTestView.xtend
+++ b/bundles/tools.vitruv.testutils.vsum/src/tools/vitruv/testutils/DefaultVirtualModelBasedTestView.xtend
@@ -39,7 +39,7 @@ class DefaultVirtualModelBasedTestView implements VirtualModelBasedTestView, Non
 
 	private def NonTransactionalTestView generateTestView(Path testProjectPath, TestUserInteraction userInteraction) {
 		new ChangePublishingTestView(testProjectPath, userInteraction, this.uriMode, virtualModel,
-			virtualModel.uuidResolver)[virtualModel.getModelInstance(it).resource]
+			virtualModel.uuidResolver)[virtualModel.getModelInstance(it)?.resource]
 	}
 
 	override getVirtualModel() {