diff --git a/tests/org.eclipse.xtext.tests/build.properties b/tests/org.eclipse.xtext.tests/build.properties
index d141895ac..bccf00482 100644
--- a/tests/org.eclipse.xtext.tests/build.properties
+++ b/tests/org.eclipse.xtext.tests/build.properties
@@ -1,5 +1,6 @@
 source.. = src/,\
            src-gen/,\
+           src-gen2/,\
            emf-gen/,\
            suites/,\
            xtend-gen/