diff --git a/tosfs/tests/conftest.py b/tosfs/tests/conftest.py
index 16ab5b6..be549a4 100644
--- a/tosfs/tests/conftest.py
+++ b/tosfs/tests/conftest.py
@@ -49,7 +49,7 @@ def tosfs(_tosfs_env_prepare: None) -> TosFileSystem:
 
 @pytest.fixture(scope="module")
 def fsspecfs(_tosfs_env_prepare: None) -> Any:
-    known_implementations["tos"] = {"class": "tosfs.core.TosFileSystem"}
+    known_implementations["tos"] = {"class": "tosfs.TosFileSystem"}
 
     fsspecfs, _ = fsspec.core.url_to_fs(
         "tos://",
diff --git a/tosfs/tests/test_fsspec_integration.py b/tosfs/tests/test_fsspec_integration.py
new file mode 100644
index 0000000..d9facd5
--- /dev/null
+++ b/tosfs/tests/test_fsspec_integration.py
@@ -0,0 +1,43 @@
+# ByteDance Volcengine EMR, Copyright 2024.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+
+import fsspec
+from fsspec.registry import known_implementations
+from tos import EnvCredentialsProvider
+
+
+def test_fssepc_register():
+    fsspec.register_implementation("tos", "tosfs.TosFileSystem")
+
+    tosfs, _ = fsspec.core.url_to_fs(
+        "tos://",
+        endpoint_url=os.environ.get("TOS_ENDPOINT"),
+        region=os.environ.get("TOS_REGION"),
+        credentials_provider=EnvCredentialsProvider(),
+    )
+    assert len(tosfs.ls("")) > 0
+
+
+def test_set_known_implementations():
+    known_implementations["tos"] = {"class": "tosfs.core.TosFileSystem"}
+
+    tosfs, _ = fsspec.core.url_to_fs(
+        "tos://",
+        endpoint_url=os.environ.get("TOS_ENDPOINT"),
+        region=os.environ.get("TOS_REGION"),
+        credentials_provider=EnvCredentialsProvider(),
+    )
+    assert len(tosfs.ls("")) > 0
diff --git a/tosfs/tests/test_tosfs.py b/tosfs/tests/test_tosfs.py
index 8a06fe0..8b72379 100644
--- a/tosfs/tests/test_tosfs.py
+++ b/tosfs/tests/test_tosfs.py
@@ -17,7 +17,7 @@
 import pytest
 from tos.exceptions import TosServerError
 
-from tosfs.core import TosFileSystem
+from tosfs import TosFileSystem
 from tosfs.exceptions import TosfsError
 from tosfs.utils import create_temp_dir, random_str