diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6c0bcb4a..76cf8560 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -117,6 +117,7 @@ jobs:
             libfabric_version: v1.13.x
           - config_name: ring reduce algorithm
             env_setup: export SHMEM_REDUCE_ALGORITHM=ring
+                       export SHMEM_SCAN_ALGORITHM=ring
             sos_config: --enable-error-checking --enable-pmi-simple
             libfabric_version: v1.13.x
           - config_name: ring fcollect algorithm, tx/rx single poll limit
diff --git a/src/shmem_comm.h b/src/shmem_comm.h
index a788a841..dec460be 100644
--- a/src/shmem_comm.h
+++ b/src/shmem_comm.h
@@ -342,6 +342,7 @@ shmem_internal_atomicv(shmem_ctx_t ctx, void *target, const void *source,
 #else
     if (shmem_shr_transport_use_atomic(ctx, target, len, pe, datatype)) {
         shmem_shr_transport_atomicv(ctx, target, source, len, pe, op, datatype);
+        shmem_transport_quiet(ctx);
     } else {
         shmem_transport_atomicv((shmem_transport_ctx_t *)ctx, target, source, len,
                                 pe, op, datatype, completion);