diff --git a/test/mpi/main.cc b/test/mpi/main.cc
index 764439f617..074c2fcad7 100644
--- a/test/mpi/main.cc
+++ b/test/mpi/main.cc
@@ -663,6 +663,10 @@ int main(int argc, char *argv[])
                          "a problem\n";
             failed = 1;
         }
+
+        if (total_done_skipped_failed[3] != 0) {
+            failed = 1;
+        }
     }
 
 test_exit:
diff --git a/test/mpi/test_allgather.cc b/test/mpi/test_allgather.cc
index 9690976874..ebca8c4c95 100644
--- a/test/mpi/test_allgather.cc
+++ b/test/mpi/test_allgather.cc
@@ -79,9 +79,11 @@ ucc_status_t TestAllgather::check()
     dt_size = ucc_dt_size(dt);
     for (i = 0; i < size; i++) {
         init_buffer(PTR_OFFSET(check_buf, i * single_rank_count * dt_size),
-                    single_rank_count, dt, mem_type, i * (iter_persistent + 1));
+                    single_rank_count, dt, UCC_MEMORY_TYPE_HOST,
+                    i * (iter_persistent + 1));
     }
 
+
     return compare_buffers(rbuf, check_buf, single_rank_count * size, dt,
                            mem_type);
 }
diff --git a/test/mpi/test_allgatherv.cc b/test/mpi/test_allgatherv.cc
index 9554f1c616..a3bfa55d93 100644
--- a/test/mpi/test_allgatherv.cc
+++ b/test/mpi/test_allgatherv.cc
@@ -82,18 +82,17 @@ ucc_status_t TestAllgatherv::set_input(int iter_persistent)
 {
     size_t dt_size = ucc_dt_size(dt);
     int    rank;
-    void  *buf, *check;
+    void  *buf;
 
+    this->iter_persistent = iter_persistent;
     MPI_Comm_rank(team.comm, &rank);
     if (inplace) {
         buf = PTR_OFFSET(rbuf, displacements[rank] * dt_size);
     } else {
         buf = sbuf;
     }
-    check = PTR_OFFSET(check_buf, displacements[rank] * dt_size);
     init_buffer(buf, counts[rank], dt, mem_type, rank * (iter_persistent + 1));
-    UCC_CHECK(ucc_mc_memcpy(check, buf, counts[rank] * dt_size,
-                            UCC_MEMORY_TYPE_HOST, mem_type));
+
     return UCC_OK;
 }
 
@@ -108,23 +107,19 @@ TestAllgatherv::~TestAllgatherv() {
 
 ucc_status_t TestAllgatherv::check()
 {
-    MPI_Datatype mpi_dt      = ucc_dt_to_mpi(dt);
-    int          total_count = 0;
-    int          size, rank, completed, i;
-    MPI_Request  req;
+    int total_count = 0;
+    int size, i;
 
     MPI_Comm_size(team.comm, &size);
-    MPI_Comm_rank(team.comm, &rank);
     for (i = 0 ; i < size; i++) {
         total_count += counts[i];
     }
-    MPI_Iallgatherv(MPI_IN_PLACE, 0, MPI_DATATYPE_NULL, check_buf,
-                    (int *)counts, (int *)displacements, mpi_dt, team.comm,
-                    &req);
-    do {
-        MPI_Test(&req, &completed, MPI_STATUS_IGNORE);
-        ucc_context_progress(team.ctx);
-    } while(!completed);
+
+    for (i = 0; i < size; i++) {
+        init_buffer(PTR_OFFSET(check_buf, displacements[i] * ucc_dt_size(dt)),
+                    counts[i], dt, UCC_MEMORY_TYPE_HOST,
+                    i * (iter_persistent + 1));
+    }
 
     return compare_buffers(rbuf, check_buf, total_count, dt, mem_type);
 }
diff --git a/test/mpi/test_alltoall.cc b/test/mpi/test_alltoall.cc
index c66a5099fa..a92900265e 100644
--- a/test/mpi/test_alltoall.cc
+++ b/test/mpi/test_alltoall.cc
@@ -107,10 +107,10 @@ ucc_status_t TestAlltoall::check()
     MPI_Comm_size(team.comm, &size);
     single_rank_count = args.src.info.count / size;
 
-    for (   i = 0; i < size; i++) {
+    for (i = 0; i < size; i++) {
         init_buffer(PTR_OFFSET(check_buf, i * single_rank_count * ucc_dt_size(dt)),
-                    single_rank_count, dt, mem_type, i * (iter_persistent + 1),
-                    single_rank_count * rank);
+                    single_rank_count, dt, UCC_MEMORY_TYPE_HOST,
+                    i * (iter_persistent + 1), single_rank_count * rank);
     }
 
     return compare_buffers(rbuf, check_buf, single_rank_count * size, dt,
diff --git a/test/mpi/test_alltoallv.cc b/test/mpi/test_alltoallv.cc
index 522add0a3f..aaa65b7e10 100644
--- a/test/mpi/test_alltoallv.cc
+++ b/test/mpi/test_alltoallv.cc
@@ -100,7 +100,7 @@ TestAlltoallv::TestAlltoallv(ucc_test_team_t &_team, TestCaseParams &params) :
     if (TEST_SKIP_NONE != skip_reduce(test_skip, team.comm)) {
         return;
     }
-    check_buf = ucc_malloc((sncounts + rncounts) * dt_size, "check buf");
+    check_buf = ucc_malloc(rncounts * dt_size, "check buf");
     UCC_MALLOC_CHECK(check_buf);
 
     if (!is_onesided) {
@@ -184,13 +184,11 @@ TestAlltoallv::TestAlltoallv(ucc_test_team_t &_team, TestCaseParams &params) :
 
 ucc_status_t TestAlltoallv::set_input(int iter_persistent)
 {
-    size_t dt_size = ucc_dt_size(dt);
-    int    rank;
+    int rank;
 
+    this->iter_persistent = iter_persistent;
     MPI_Comm_rank(team.comm, &rank);
     init_buffer(sbuf, sncounts, dt, mem_type, rank * (iter_persistent + 1));
-    UCC_CHECK(ucc_mc_memcpy(check_buf, sbuf, sncounts * dt_size,
-                            UCC_MEMORY_TYPE_HOST, mem_type));
 
     return UCC_OK;
 }
@@ -209,20 +207,25 @@ TestAlltoallv::~TestAlltoallv()
 
 ucc_status_t TestAlltoallv::check()
 {
-    size_t      dt_size = ucc_dt_size(dt);
     MPI_Request req;
-    int         completed;
-    void       *check;
+    int         i, size, rank, completed;
 
-    check = PTR_OFFSET(check_buf, sncounts * dt_size);
-    MPI_Ialltoallv(check_buf, scounts, sdispls, ucc_dt_to_mpi(dt), check,
-                   rcounts, rdispls, ucc_dt_to_mpi(dt), team.comm, &req);
+    MPI_Comm_size(team.comm, &size);
+    MPI_Comm_rank(team.comm, &rank);
+
+    MPI_Ialltoall(sdispls, 1, MPI_INT, scounts, 1, MPI_INT, team.comm, &req);
     do {
         MPI_Test(&req, &completed, MPI_STATUS_IGNORE);
         ucc_context_progress(team.ctx);
     } while(!completed);
 
-    return compare_buffers(rbuf, check, rncounts, dt, mem_type);
+    for (i = 0; i < size; i++) {
+        init_buffer(PTR_OFFSET(check_buf, rdispls[i] * ucc_dt_size(dt)),
+                    rcounts[i], dt, UCC_MEMORY_TYPE_HOST,
+                    i * (iter_persistent + 1), scounts[i]);
+    }
+
+    return compare_buffers(rbuf, check_buf, rncounts, dt, mem_type);
 }
 
 std::string TestAlltoallv::str()