diff --git a/pytorch_pfn_extras/distributed/_initialize.py b/pytorch_pfn_extras/distributed/_initialize.py
index 9d09c122..1583db58 100644
--- a/pytorch_pfn_extras/distributed/_initialize.py
+++ b/pytorch_pfn_extras/distributed/_initialize.py
@@ -1,7 +1,8 @@
 import os
+from datetime import timedelta
 from typing import Tuple
 
-import torch
+import torch.distributed
 
 
 def initialize_ompi_environment(
@@ -13,6 +14,7 @@ def initialize_ompi_environment(
     local_rank: int = 0,
     addr: str = "localhost",
     port: str = "1234",
+    timeout: int = 1800,
 ) -> Tuple[int, int, int]:
     """Initialize `torch.distributed` environments with values taken from
     OpenMPI.
@@ -32,6 +34,8 @@ def initialize_ompi_environment(
             Defaults to ``"localhost"``
         port: The port of the master process of `torch.distributed`.
             Defaults to ``"1234"``
+        timeout: Timeout seconds for `torch.distributed` collective communication.
+            Defaults to ``1800``.
     """
     e = os.environ
     backend = backend
@@ -62,7 +66,11 @@ def initialize_ompi_environment(
 
     if world_size > 1 and not torch.distributed.is_initialized():  # type: ignore
         torch.distributed.init_process_group(  # type: ignore
-            backend, init_method=init_method, world_size=world_size, rank=rank
+            backend,
+            init_method=init_method,
+            world_size=world_size,
+            rank=rank,
+            timeout=timedelta(seconds=timeout),
         )
         torch.distributed.barrier()  # type: ignore
 
diff --git a/tests/pytorch_pfn_extras_tests/training_tests/extensions_tests/test_distributed_snapshot.py b/tests/pytorch_pfn_extras_tests/training_tests/extensions_tests/test_distributed_snapshot.py
index f1e8c7d9..9113dc48 100644
--- a/tests/pytorch_pfn_extras_tests/training_tests/extensions_tests/test_distributed_snapshot.py
+++ b/tests/pytorch_pfn_extras_tests/training_tests/extensions_tests/test_distributed_snapshot.py
@@ -42,7 +42,9 @@ def get_trainer(path):
 def _init_distributed(use_cuda):
     if "OMPI_COMM_WORLD_SIZE" in os.environ:
         size, rank, local_rank = distributed.initialize_ompi_environment(
-            backend="nccl", init_method="env"
+            backend="nccl",
+            init_method="env",
+            timeout=15,
         )
     else:
         pytest.skip("This test requires MPI to run")
@@ -99,6 +101,8 @@ def test_distributed_snapshot(mpi_tmp_path, saver_rank):
         with trainer.run_iteration():
             pass
     assert 1 == trainer.iteration
+    if comm_size > 1:
+        torch.distributed.barrier()
     pattern = os.path.join(trainer.out, "snapshot_iter_*")
     found = [os.path.basename(path) for path in glob.glob(pattern)]
     # the snapshot is generated only for the saver rank
@@ -130,10 +134,14 @@ def test_distributed_snapshot_autoload(mpi_tmp_path, saver_rank):
     )
     trainer = get_trainer(mpi_tmp_path)
     trainer.extend(snapshot, trigger=(1, "iteration"), priority=2)
+    if comm_size > 1:
+        torch.distributed.barrier()
     for _ in range(1):
         with trainer.run_iteration():
             pass
     assert 1 == trainer.iteration
+    if comm_size > 1:
+        torch.distributed.barrier()
     pattern = os.path.join(trainer.out, "snapshot_iter_*")
     found = [os.path.basename(path) for path in glob.glob(pattern)]
     assert len(found) == 1
@@ -168,6 +176,8 @@ def test_distributed_snapshot_on_error(mpi_tmp_path, saver_rank):
         pass
         dummy_tb = dummy_exception.__traceback__
         snapshot.on_error(trainer, dummy_exception, dummy_tb)
+    if comm_size > 1:
+        torch.distributed.barrier()
     pattern = os.path.join(trainer.out, f"snapshot_iter_{saver_rank}_*")
     found = [os.path.basename(path) for path in glob.glob(pattern)]
     # the snapshot is generated only for the saver rank
diff --git a/tests/pytorch_pfn_extras_tests/training_tests/extensions_tests/test_sharded_snapshot.py b/tests/pytorch_pfn_extras_tests/training_tests/extensions_tests/test_sharded_snapshot.py
index 01aa6d9e..394786f3 100644
--- a/tests/pytorch_pfn_extras_tests/training_tests/extensions_tests/test_sharded_snapshot.py
+++ b/tests/pytorch_pfn_extras_tests/training_tests/extensions_tests/test_sharded_snapshot.py
@@ -16,7 +16,9 @@
 def _init_distributed(use_cuda):
     if "OMPI_COMM_WORLD_SIZE" in os.environ:
         size, rank, local_rank = distributed.initialize_ompi_environment(
-            backend="nccl", init_method="env"
+            backend="nccl",
+            init_method="env",
+            timeout=15,
         )
     else:
         pytest.skip("This test requires MPI to run")
@@ -305,6 +307,9 @@ def test_sharded_snapshot(mpi_tmp_path):
         with trainer.run_iteration():
             pass
 
+    if comm_size > 1:
+        torch.distributed.barrier()
+
     pattern = os.path.join(trainer.out, "snapshot_iter_*")
     found = [path for path in glob(pattern)]
 
@@ -340,6 +345,8 @@ def test_sharded_snapshot_cleanup(mpi_tmp_path):
     for _ in range(5):
         with trainer.run_iteration():
             pass
+    if comm_size > 1:
+        torch.distributed.barrier()
 
     pattern = os.path.join(trainer.out, "snapshot_iter_*")
     found = [os.path.basename(path) for path in glob(pattern)]
@@ -368,12 +375,16 @@ def test_sharded_snapshot_autoload(mpi_tmp_path):
         autoload=True,
     )
 
-    trainer = get_trainer("./tmp/test_result", device)
+    trainer = get_trainer(mpi_tmp_path, device)
     trainer.extend(snapshot_extension, trigger=(1, "iteration"), priority=2)
     for _ in range(5):
         with trainer.run_iteration():
             pass
-    trainer2 = get_trainer("./tmp/test_result", device)
+
+    if comm_size > 1:
+        torch.distributed.barrier()
+
+    trainer2 = get_trainer(mpi_tmp_path, device)
     snapshot_extension2 = snapshot(
         filename=fmt,
         snapshot_mode=SnapshotMode.SHARDED,
@@ -385,7 +396,7 @@ def test_sharded_snapshot_autoload(mpi_tmp_path):
     with pytest.raises(AssertionError):
         _assert_state_dict_is_eq(trainer2.state_dict(), trainer.state_dict())
 
-    trainer3 = get_trainer("./tmp/test_result", device)
+    trainer3 = get_trainer(mpi_tmp_path, device)
     snapshot_extension3 = snapshot(
         filename=fmt,
         snapshot_mode=SnapshotMode.SHARDED,