Index: test/msan/fork.cc
===================================================================
--- test/msan/fork.cc
+++ test/msan/fork.cc
@@ -31,6 +31,7 @@
   while (true) {
     v = x;
     x = v;
+    usleep(10000);
     if (__atomic_load_n(&done, __ATOMIC_RELAXED))
       return;
   }