diff --git a/tests/org.eclipse.m2m.tests.qvt.oml/src/org/eclipse/m2m/tests/qvt/oml/transform/TestFailedTransformation.java b/tests/org.eclipse.m2m.tests.qvt.oml/src/org/eclipse/m2m/tests/qvt/oml/transform/TestFailedTransformation.java
index 9691a85..1ff5d53 100644
--- a/tests/org.eclipse.m2m.tests.qvt.oml/src/org/eclipse/m2m/tests/qvt/oml/transform/TestFailedTransformation.java
+++ b/tests/org.eclipse.m2m.tests.qvt.oml/src/org/eclipse/m2m/tests/qvt/oml/transform/TestFailedTransformation.java
@@ -5,6 +5,7 @@
 import java.io.StringWriter;
 
 import org.eclipse.m2m.internal.qvt.oml.common.io.IOFile;
+import org.eclipse.m2m.internal.qvt.oml.evaluator.QVTEvaluationOptions;
 import org.eclipse.m2m.internal.qvt.oml.evaluator.QvtRuntimeException;
 import org.eclipse.m2m.internal.qvt.oml.library.Context;
 import org.eclipse.m2m.internal.qvt.oml.library.IContext;
@@ -35,6 +36,7 @@
 			IContext context = getData().getContext();
 			Context newContext = QvtLaunchUtil.createContext(context.getConfigProperties());
 			newContext.setLog(new WriterLog(myLogger));
+			newContext.getSessionData().setValue(QVTEvaluationOptions.FLAG_READONLY_GUARD_ENABLED, Boolean.TRUE);
 			
 			transformer.transform(
 					getIFile(getData().getTransformation(getProject())),