diff --git a/test/core/security/print_google_default_creds_token.c b/test/core/security/print_google_default_creds_token.c
index 50fe61c9969..fcbbe334f45 100644
--- a/test/core/security/print_google_default_creds_token.c
+++ b/test/core/security/print_google_default_creds_token.c
@@ -100,7 +100,7 @@ int main(int argc, char **argv) {
 
   gpr_mu_lock(GRPC_POLLSET_MU(&sync.pollset));
   while (!sync.is_done) {
-    grpc_pollset_worker worker;
+    grpc_pollset_worker *worker = NULL;
     grpc_pollset_work(&exec_ctx, &sync.pollset, &worker,
                       gpr_now(GPR_CLOCK_MONOTONIC),
                       gpr_inf_future(GPR_CLOCK_MONOTONIC));
diff --git a/test/core/security/verify_jwt.c b/test/core/security/verify_jwt.c
index 378a37f26c5..c9071fa08b0 100644
--- a/test/core/security/verify_jwt.c
+++ b/test/core/security/verify_jwt.c
@@ -111,7 +111,7 @@ int main(int argc, char **argv) {
 
   gpr_mu_lock(GRPC_POLLSET_MU(&sync.pollset));
   while (!sync.is_done) {
-    grpc_pollset_worker worker;
+    grpc_pollset_worker *worker = NULL;
     grpc_pollset_work(&exec_ctx, &sync.pollset, &worker,
                       gpr_now(GPR_CLOCK_MONOTONIC),
                       gpr_inf_future(GPR_CLOCK_MONOTONIC));