need to use project specific compiler options during build
diff --git a/testplugins/org.eclipse.objectteams.otdt.ui.tests.refactoring/build.properties b/testplugins/org.eclipse.objectteams.otdt.ui.tests.refactoring/build.properties
index ff44f7e..8fe549f 100644
--- a/testplugins/org.eclipse.objectteams.otdt.ui.tests.refactoring/build.properties
+++ b/testplugins/org.eclipse.objectteams.otdt.ui.tests.refactoring/build.properties
@@ -8,4 +8,4 @@
                workspace/,\

                JCL/,\

                plugin.xml

-src.includes = src/

+javacProjectSettings=true