diff --git a/tosfs/tests/test_fsspec_integration.py b/tosfs/tests/test_fsspec_integration.py
index ea92f7c..0960316 100644
--- a/tosfs/tests/test_fsspec_integration.py
+++ b/tosfs/tests/test_fsspec_integration.py
@@ -87,13 +87,11 @@ def __init__(self):
 
 
 def test_customized_class(bucket, temporary_workspace):
-    known_implementations["tos"] = {
-        "class": "tosfs.tests.test_fsspec_integration.MyTosFileSystem"
-    }
-    fsspec.register_implementation(
-        "tos", "tosfs.tests.test_fsspec_integration.MyTosFileSystem", True
-    )
-    fsspec._registry = "tosfs.tests.test_fsspec_integration.MyTosFileSystem"
+    # known_implementations["tos"] = {
+    #     "class": "tosfs.tests.test_fsspec_integration.MyTosFileSystem"
+    # }
+    fsspec.register_implementation("tos", MyTosFileSystem, True)
+    # fsspec._registry = "tosfs.tests.test_fsspec_integration.MyTosFileSystem"
 
     logger.error("----------------")
     logger.error("tos" in fsspec.registry)