diff --git a/.github/workflows/ompi_mpi4py.yaml b/.github/workflows/ompi_mpi4py.yaml
index 0e9f675023e..25c865d1cb1 100644
--- a/.github/workflows/ompi_mpi4py.yaml
+++ b/.github/workflows/ompi_mpi4py.yaml
@@ -113,27 +113,27 @@ jobs:
         CFLAGS: "-O0"
 
     - name: Test mpi4py (singleton)
-      run:  python test/main.py -v -x TestExcErrhandlerNull
+      run:  python test/main.py -v -x testContiguousBigMPI
       if:   ${{ true }}
       timeout-minutes: 10
     - name: Test mpi4py (np=1)
-      run:  mpiexec -n 1 python test/main.py -v -x TestExcErrhandlerNull
+      run:  mpiexec -n 1 python test/main.py -v  -x testContiguousBigMPI
       if:   ${{ true }}
       timeout-minutes: 10
     - name: Test mpi4py (np=2)
-      run:  mpiexec -n 2 python test/main.py -v -f -x TestExcErrhandlerNull
+      run:  mpiexec -n 2 python test/main.py -v -f  -x testContiguousBigMPI
       if:   ${{ true }}
       timeout-minutes: 10
     - name: Test mpi4py (np=3)
-      run:  mpiexec -n 3 python test/main.py -v -f -x TestExcErrhandlerNull
+      run:  mpiexec -n 3 python test/main.py -v -f  -x testContiguousBigMPI
       if:   ${{ true }}
       timeout-minutes: 10
     - name: Test mpi4py (np=4)
-      run:  mpiexec -n 4 python test/main.py -v -f -x TestExcErrhandlerNull
+      run:  mpiexec -n 4 python test/main.py -v -f  -x testContiguousBigMPI
       if:   ${{ true }}
       timeout-minutes: 10
     - name: Test mpi4py (np=5)
-      run:  mpiexec -n 5 python test/main.py -v -f -x TestExcErrhandlerNull
+      run:  mpiexec -n 5 python test/main.py -v -f  -x testContiguousBigMPI
       if:   ${{ true }}
       timeout-minutes: 10
 
@@ -151,7 +151,7 @@ jobs:
         echo LD_LIBRARY_PATH=/opt/ompi/lib >> $GITHUB_ENV
 
     - name: Test mpi4py (singleton)
-      run:  python test/main.py -v -x TestExcErrhandlerNull
+      run:  python test/main.py -v -x testContiguousBigMPI
       if:   ${{ true }}
       timeout-minutes: 10
 
diff --git a/VERSION b/VERSION
index 44eb7329d5d..20ae1c819c6 100644
--- a/VERSION
+++ b/VERSION
@@ -20,7 +20,7 @@ minor=1
 release=0
 
 # MPI Standard Compliance Level
-mpi_standard_version=3
+mpi_standard_version=4
 mpi_standard_subversion=1
 
 # OMPI required dependency versions.
diff --git a/ompi/mpi/c/request_get_status_all.c.in b/ompi/mpi/c/request_get_status_all.c.in
index dbbe17b6a14..8225aaef999 100644
--- a/ompi/mpi/c/request_get_status_all.c.in
+++ b/ompi/mpi/c/request_get_status_all.c.in
@@ -12,7 +12,7 @@
  * Copyright (c) 2006-2010 Cisco Systems, Inc.  All rights reserved.
  * Copyright (c) 2015      Research Organization for Information Science
  *                         and Technology (RIST). All rights reserved.
- * Copyright (c) 2024      Triad National Security, LLC. All rights
+ * Copyright (c) 2024-2025 Triad National Security, LLC. All rights
  *                         reserved.
  * Copyright (c) 2025      Advanced Micro Devices, Inc. All rights reserved
  *
@@ -110,7 +110,7 @@ PROTOTYPE ERROR_CLASS request_get_status_all(INT count, REQUEST_CONST requests:c
     for (i = 0; i < count; i++) {
         if( (requests[i] == MPI_REQUEST_NULL) || (requests[i]->req_state == OMPI_REQUEST_INACTIVE) ) {
             if (MPI_STATUS_IGNORE != statuses) {
-                OMPI_COPY_STATUS(&statuses[i], ompi_status_empty, false);
+                OMPI_COPY_STATUS(&statuses[i], ompi_status_empty, true);
             }
         }
         /* If this is a generalized request, we *always* have to call
diff --git a/ompi/mpi/c/request_get_status_any.c.in b/ompi/mpi/c/request_get_status_any.c.in
index cc33ed33bf3..60fc6ce4446 100644
--- a/ompi/mpi/c/request_get_status_any.c.in
+++ b/ompi/mpi/c/request_get_status_any.c.in
@@ -12,7 +12,7 @@
  * Copyright (c) 2006-2010 Cisco Systems, Inc.  All rights reserved.
  * Copyright (c) 2015      Research Organization for Information Science
  *                         and Technology (RIST). All rights reserved.
- * Copyright (c) 2024      Triad National Security, LLC. All rights
+ * Copyright (c) 2024-2025 Triad National Security, LLC. All rights
  *                         reserved.
  * Copyright (c) 2025      Advanced Micro Devices, Inc. All rights reserved
  *
@@ -73,7 +73,7 @@ PROTOTYPE ERROR_CLASS request_get_status_any(INT count, REQUEST_CONST requests:c
         *flag = true;
         *indx = MPI_UNDEFINED;
         if (MPI_STATUS_IGNORE != status) {
-            OMPI_COPY_STATUS(status, ompi_status_empty, false);
+            OMPI_COPY_STATUS(status, ompi_status_empty, true);
         }
         return MPI_SUCCESS;
     }
@@ -115,7 +115,7 @@ PROTOTYPE ERROR_CLASS request_get_status_any(INT count, REQUEST_CONST requests:c
         *flag = true;
         *indx = MPI_UNDEFINED;
         if (MPI_STATUS_IGNORE != status) {
-            OMPI_COPY_STATUS(status, ompi_status_empty, false);
+            OMPI_COPY_STATUS(status, ompi_status_empty, true);
         }
         return MPI_SUCCESS;
     }
diff --git a/ompi/mpi/c/testany.c.in b/ompi/mpi/c/testany.c.in
index 50ed88b2fa5..4e533ecf6df 100644
--- a/ompi/mpi/c/testany.c.in
+++ b/ompi/mpi/c/testany.c.in
@@ -15,7 +15,7 @@
  *                         reserved.
  * Copyright (c) 2014-2015 Research Organization for Information Science
  *                         and Technology (RIST). All rights reserved.
- * Copyright (c) 2021-2024 Triad National Security, LLC. All rights
+ * Copyright (c) 2021-2025 Triad National Security, LLC. All rights
  *                         reserved.
  * Copyright (c) 2024      NVIDIA Corporation.  All rights reserved.
  * $COPYRIGHT$
@@ -67,7 +67,7 @@ PROTOTYPE ERROR_CLASS testany(INT count, REQUEST_INOUT requests, INT_OUT indx, I
         *completed = true;
         *indx = MPI_UNDEFINED;
         if (MPI_STATUS_IGNORE != status) {
-            OMPI_COPY_STATUS(status, ompi_status_empty, false);
+            OMPI_COPY_STATUS(status, ompi_status_empty, true);
         }
         return MPI_SUCCESS;
     }
diff --git a/ompi/mpi/c/wait.c.in b/ompi/mpi/c/wait.c.in
index d2db5ab726f..7271c18ef7c 100644
--- a/ompi/mpi/c/wait.c.in
+++ b/ompi/mpi/c/wait.c.in
@@ -14,7 +14,7 @@
  *                         and Technology (RIST). All rights reserved.
  * Copyright (c) 2024      Triad National Security, LLC. All rights
  *                         reserved.
- * Copyright (c) 2024      Triad National Security, LLC. All rights
+ * Copyright (c) 2024-2025 Triad National Security, LLC. All rights
  *                         reserved.
  * $COPYRIGHT$
  *
@@ -52,9 +52,10 @@ PROTOTYPE ERROR_CLASS wait(REQUEST_INOUT request, STATUS_OUT status)
 
     if (MPI_REQUEST_NULL == *request) {
         if (MPI_STATUS_IGNORE != status) {
-            OMPI_COPY_STATUS(status, ompi_status_empty, false);
+            OMPI_COPY_STATUS(status, ompi_status_empty, true);
             /*
              * Per MPI-1, the MPI_ERROR field is not defined for single-completion calls
+             * Rules changed later apparently.  See section 3.7.3 of the MPI 4.1 standard.
              */
             MEMCHECKER(
                 opal_memchecker_base_mem_undefined(&status->MPI_ERROR, sizeof(int));
diff --git a/ompi/mpi/c/waitany.c.in b/ompi/mpi/c/waitany.c.in
index 5d2fb4424eb..86bac469e4a 100644
--- a/ompi/mpi/c/waitany.c.in
+++ b/ompi/mpi/c/waitany.c.in
@@ -18,7 +18,7 @@
  * Copyright (c) 2021-2024 Triad National Security, LLC. All rights
  *                         reserved.
  * Copyright (c) 2024      NVIDIA Corporation.  All rights reserved.
- * Copyright (c) 2024      Triad National Security, LLC. All rights
+ * Copyright (c) 2024-2025 Triad National Security, LLC. All rights
  *                         reserved.
  * $COPYRIGHT$
  *
@@ -68,7 +68,7 @@ PROTOTYPE ERROR_CLASS waitany(INT count, REQUEST_INOUT requests, INT_OUT indx, S
     if (OPAL_UNLIKELY(0 == count)) {
         *indx = MPI_UNDEFINED;
         if (MPI_STATUS_IGNORE != status) {
-            OMPI_COPY_STATUS(status, ompi_status_empty, false);
+            OMPI_COPY_STATUS(status, ompi_status_empty, true);
         }
         return MPI_SUCCESS;
     }
diff --git a/ompi/request/request.c b/ompi/request/request.c
index 3f72a23fde0..c55f010690d 100644
--- a/ompi/request/request.c
+++ b/ompi/request/request.c
@@ -18,7 +18,7 @@
  * Copyright (c) 2015-2024 Research Organization for Information Science
  *                         and Technology (RIST).  All rights reserved.
  * Copyright (c) 2018      FUJITSU LIMITED.  All rights reserved.
- * Copyright (c) 2018      Triad National Security, LLC. All rights
+ * Copyright (c) 2018-2025 Triad National Security, LLC. All rights
  *                         reserved.
  * Copyright (c) 2022      IBM Corporation.  All rights reserved.
  * Copyright (c) 2024      NVIDIA Corporation.  All rights reserved.
@@ -47,7 +47,14 @@ ompi_request_t                   ompi_request_empty = {{{{0}}}};
 #if MPI_VERSION >= 4
 ompi_request_t                   ompi_request_empty_send = {{{{0}}}};
 #endif
-ompi_status_public_t             ompi_status_empty = {0};
+/*
+ * See section 3.7.3 of the MPI 1.3 (probably older as well) MPI standard
+ */
+ompi_status_public_t             ompi_status_empty = {.MPI_TAG = MPI_ANY_TAG, 
+                                                      .MPI_SOURCE = MPI_ANY_SOURCE, 
+                                                      .MPI_ERROR = MPI_SUCCESS,
+                                                      ._cancelled = 0,
+                                                      ._ucount = 0UL};
 ompi_request_fns_t               ompi_request_functions = {
     ompi_request_default_test,
     ompi_request_default_test_any,