Index: sources/test_regression/16062005b/system.cpp
===================================================================
--- sources/test_regression/16062005b/system.cpp	(revision 55)
+++ sources/test_regression/16062005b/system.cpp	(revision 60)
@@ -65,4 +65,7 @@
     }
 
+    // Setup number of threads open-mp to 1 with the macro threads_omp()
+    threads_omp();
+
     ofstream o;
     o.open (argv[1], ios::out | ios::trunc);