[unrelated] Fix warnings
diff --git a/tests/org.eclipse.qvtd.umlx.tests/build.properties b/tests/org.eclipse.qvtd.umlx.tests/build.properties
index 2b112c4..215eafe 100644
--- a/tests/org.eclipse.qvtd.umlx.tests/build.properties
+++ b/tests/org.eclipse.qvtd.umlx.tests/build.properties
@@ -1,7 +1,9 @@
-source.. = src/
+source.. = src/,\
+		   src-gen/
 output.. = bin/
 bin.includes = META-INF/,\
                .,\
                plugin.properties,\
-               about.html
+               about.html,\
+               plugin.xml
 src.includes = about.html
diff --git a/tests/org.eclipse.qvtd.xtext.qvtcore.tests/build.properties b/tests/org.eclipse.qvtd.xtext.qvtcore.tests/build.properties
index 2b04ed1..62e9a05 100644
--- a/tests/org.eclipse.qvtd.xtext.qvtcore.tests/build.properties
+++ b/tests/org.eclipse.qvtd.xtext.qvtcore.tests/build.properties
@@ -18,7 +18,6 @@
                build.properties
 jars.compile.order = .
 source.. = src/,\
-           src-gen/,\
-           test-gen/
+           src-gen/
 output.. = bin/
 src.includes = about.html
diff --git a/tests/org.eclipse.qvtd.xtext.qvtcore.tests/src/org/eclipse/qvtd/xtext/qvtcore/tests/families2persons/Families2PersonsNormalizer.java b/tests/org.eclipse.qvtd.xtext.qvtcore.tests/src/org/eclipse/qvtd/xtext/qvtcore/tests/families2persons/Families2PersonsNormalizer.java
index 35098e6..63b1546 100644
--- a/tests/org.eclipse.qvtd.xtext.qvtcore.tests/src/org/eclipse/qvtd/xtext/qvtcore/tests/families2persons/Families2PersonsNormalizer.java
+++ b/tests/org.eclipse.qvtd.xtext.qvtcore.tests/src/org/eclipse/qvtd/xtext/qvtcore/tests/families2persons/Families2PersonsNormalizer.java
@@ -74,7 +74,7 @@
 		assert maleClass != null;
 		EClass personClass = (EClass) ePackage.getEClassifier(PersonsPackage.Literals.PERSON.getName());
 		assert personClass != null;
-		@NonNull EAttribute personFullName = (EAttribute) personClass.getEStructuralFeature(PersonsPackage.Literals.PERSON__FULL_NAME.getName());
+		EAttribute personFullName = (EAttribute) personClass.getEStructuralFeature(PersonsPackage.Literals.PERSON__FULL_NAME.getName());
 		assert personFullName != null;
 		PersonComparator personComparator = new PersonComparator(femaleClass, personFullName);
 		ECollections.sort(resource.getContents(), personComparator);
diff --git a/tests/org.eclipse.qvtd.xtext.qvtcore.tests/src/org/eclipse/qvtd/xtext/qvtcore/tests/hsv2hsl/HSV2HSLNormalizer.java b/tests/org.eclipse.qvtd.xtext.qvtcore.tests/src/org/eclipse/qvtd/xtext/qvtcore/tests/hsv2hsl/HSV2HSLNormalizer.java
index 65f823d..898b31e 100644
--- a/tests/org.eclipse.qvtd.xtext.qvtcore.tests/src/org/eclipse/qvtd/xtext/qvtcore/tests/hsv2hsl/HSV2HSLNormalizer.java
+++ b/tests/org.eclipse.qvtd.xtext.qvtcore.tests/src/org/eclipse/qvtd/xtext/qvtcore/tests/hsv2hsl/HSV2HSLNormalizer.java
@@ -60,16 +60,18 @@
 		EPackage ePackage = eRoot.eClass().getEPackage();
 		EClass hslNodeClass = (EClass) ePackage.getEClassifier(HSLTreePackage.Literals.HSL_NODE.getName());
 		assert hslNodeClass != null;
-		@NonNull EReference hslNodeChildren = (EReference) hslNodeClass.getEStructuralFeature(HSLTreePackage.Literals.HSL_NODE__CHILDREN.getName());
+		EReference hslNodeChildren = (EReference) hslNodeClass.getEStructuralFeature(HSLTreePackage.Literals.HSL_NODE__CHILDREN.getName());
 		assert hslNodeChildren != null;
-		@NonNull EAttribute hslNodeName = (EAttribute) hslNodeClass.getEStructuralFeature(HSLTreePackage.Literals.HSL_NODE__NAME.getName());
+		EAttribute hslNodeName = (EAttribute) hslNodeClass.getEStructuralFeature(HSLTreePackage.Literals.HSL_NODE__NAME.getName());
 		assert hslNodeName != null;
 		HLSNodeComparator personComparator = new HLSNodeComparator(hslNodeName);
 		List<@NonNull EObject> allNodes = new ArrayList<@NonNull EObject>();
 		for (TreeIterator<EObject> tit = resource.getAllContents(); tit.hasNext(); ) {
 			EObject eObject = tit.next();
 			if (hslNodeClass.isInstance(eObject)) {
-				allNodes.add(eObject);
+				if (eObject != null) {
+					allNodes.add(eObject);
+				}
 			}
 		}
 		for (@NonNull EObject hslNode : allNodes) {