diff --git a/Processes/CONEXSourceCut/testCONEXSourceCut.cc b/Processes/CONEXSourceCut/testCONEXSourceCut.cc
index 3dfc6c73e0a320851d6d89fb0af864102ad7f540..dacfc8728d07f5056b5aee36153e97f362097478 100644
--- a/Processes/CONEXSourceCut/testCONEXSourceCut.cc
+++ b/Processes/CONEXSourceCut/testCONEXSourceCut.cc
@@ -27,7 +27,7 @@ using namespace corsika::units::si;
 
 TEST_CASE("CONEXSourceCut") {
   random::RNGManager::GetInstance().RegisterRandomStream("cascade");
-  random::RNGManager::GetInstance().RegisterRandomStream("s_rndm");
+  random::RNGManager::GetInstance().RegisterRandomStream("sibyll");
 
   feenableexcept(FE_INVALID);