diff --git a/tests/mmptest/src/MMPTest.cs b/tests/mmptest/src/MMPTest.cs
index e82363d62730..2227844b580e 100644
--- a/tests/mmptest/src/MMPTest.cs
+++ b/tests/mmptest/src/MMPTest.cs
@@ -464,7 +464,7 @@ public void Unified_SgenConcurrent_Test ()
 		{
 			RunMMPTest (tmpDir => {
 				TI.UnifiedTestConfig test = new TI.UnifiedTestConfig (tmpDir) {
-					CSProjConfig = "<MonoBundlingExtraArgs>--sgen-conc</MonoBundlingExtraArgs>"
+					CSProjConfig = "<EnableSGenConc>true</EnableSGenConc>"
 				};
 				TI.TestUnifiedExecutable (test);
 			});