diff --git a/mx.sulong/suite.py b/mx.sulong/suite.py
index 5d0f6625b..c52e75b42 100644
--- a/mx.sulong/suite.py
+++ b/mx.sulong/suite.py
@@ -373,6 +373,7 @@
       "buildEnv" : {
         "OS" : "<os>",
       },
+      "testProject" : True,
     },
     "com.oracle.truffle.llvm.tests.libc" : {
       "subDir" : "tests",