1 files changed, 3 insertions, 0 deletions
diff --git a/test/core/support/cpu_test.cc b/test/core/support/cpu_test.cc
index 334c4318e1..87cdc0fb50 100644
--- a/test/core/support/cpu_test.cc
+++ b/test/core/support/cpu_test.cc
@@ -119,13 +119,16 @@ static void cpu_test(void) {
   }
   gpr_mu_unlock(&ct.mu);
   fprintf(stderr, "Saw cores [");
+  fflush(stderr);
   for (i = 0; i < ct.ncores; i++) {
     if (ct.used[i]) {
       fprintf(stderr, "%d,", i);
+      fflush(stderr);
       cores_seen++;
     }
   }
   fprintf(stderr, "] (%d/%d)\n", cores_seen, ct.ncores);
+  fflush(stderr);
   gpr_free(ct.used);
 }