diff --git a/tests/test-mgenint.c b/tests/test-mgenint.c
index a3527938..3d7ea3a8 100644
--- a/tests/test-mgenint.c
+++ b/tests/test-mgenint.c
@@ -98,6 +98,8 @@ static void test2(size_t n)
   genint_init(global, n);
 }
 
+// In this test, the dimension of the global and the number of threads
+// match: we cannot have a failure.
 static void conso2(void *p)
 {
   size_t n = *(size_t*)p;