diff --git a/tests/test_communicator.py b/tests/chainermn_tests/communicator_tests/test_communicator.py
similarity index 100%
rename from tests/test_communicator.py
rename to tests/chainermn_tests/communicator_tests/test_communicator.py
diff --git a/tests/test_node_aware_communicator_base.py b/tests/chainermn_tests/communicator_tests/test_node_aware_communicator_base.py
similarity index 100%
rename from tests/test_node_aware_communicator_base.py
rename to tests/chainermn_tests/communicator_tests/test_node_aware_communicator_base.py
diff --git a/tests/test_dataset.py b/tests/chainermn_tests/datasets_tests/test_dataset.py
similarity index 100%
rename from tests/test_dataset.py
rename to tests/chainermn_tests/datasets_tests/test_dataset.py
diff --git a/tests/datasets_tests/test_empty_dataset.py b/tests/chainermn_tests/datasets_tests/test_empty_dataset.py
similarity index 100%
rename from tests/datasets_tests/test_empty_dataset.py
rename to tests/chainermn_tests/datasets_tests/test_empty_dataset.py
diff --git a/tests/test_mnist.py b/tests/chainermn_tests/datasets_tests/test_mnist.py
similarity index 100%
rename from tests/test_mnist.py
rename to tests/chainermn_tests/datasets_tests/test_mnist.py
diff --git a/tests/test_checkpoint.py b/tests/chainermn_tests/extensions_tests/test_checkpoint.py
similarity index 100%
rename from tests/test_checkpoint.py
rename to tests/chainermn_tests/extensions_tests/test_checkpoint.py
diff --git a/tests/functions_tests/test_collective_communication.py b/tests/chainermn_tests/functions_tests/test_collective_communication.py
similarity index 100%
rename from tests/functions_tests/test_collective_communication.py
rename to tests/chainermn_tests/functions_tests/test_collective_communication.py
diff --git a/tests/functions_tests/test_point_to_point_communication.py b/tests/chainermn_tests/functions_tests/test_point_to_point_communication.py
similarity index 100%
rename from tests/functions_tests/test_point_to_point_communication.py
rename to tests/chainermn_tests/functions_tests/test_point_to_point_communication.py
diff --git a/tests/functions_tests/test_pseudo_connect.py b/tests/chainermn_tests/functions_tests/test_pseudo_connect.py
similarity index 100%
rename from tests/functions_tests/test_pseudo_connect.py
rename to tests/chainermn_tests/functions_tests/test_pseudo_connect.py
diff --git a/tests/links_tests/test_batch_normalization.py b/tests/chainermn_tests/links_tests/test_batch_normalization.py
similarity index 100%
rename from tests/links_tests/test_batch_normalization.py
rename to tests/chainermn_tests/links_tests/test_batch_normalization.py
diff --git a/tests/test_link.py b/tests/chainermn_tests/links_tests/test_multi_node_chain_list.py
similarity index 100%
rename from tests/test_link.py
rename to tests/chainermn_tests/links_tests/test_multi_node_chain_list.py
diff --git a/tests/optimizer_tests/test_multi_node_optimizer.py b/tests/chainermn_tests/optimizer_tests/test_multi_node_optimizer.py
similarity index 100%
rename from tests/optimizer_tests/test_multi_node_optimizer.py
rename to tests/chainermn_tests/optimizer_tests/test_multi_node_optimizer.py