diff --git a/tests/tests.c b/tests/tests.c
index 7b35682..8983d8c 100644
--- a/tests/tests.c
+++ b/tests/tests.c
@@ -107,9 +107,9 @@ int run_test(int my_cpu, int test, int stage, int iterations)
     switch (test) {
         // Address test, walking ones.
       case 0:
-        cache_off();
+        if (my_cpu >= 0) cache_off();
         ticks += test_addr_walk1(my_cpu);
-        cache_on();
+        if (my_cpu >= 0) cache_on();
         BAILOUT;
         break;