diff --git a/dvc_webhdfs/__init__.py b/dvc_webhdfs/__init__.py
index 3bc9469..dbcb237 100644
--- a/dvc_webhdfs/__init__.py
+++ b/dvc_webhdfs/__init__.py
@@ -1,8 +1,10 @@
 import threading
+from typing import Any
 
 # pylint:disable=abstract-method
+from dvc.utils.objects import cached_property
 from dvc_objects.fs.base import FileSystem
-from funcy import cached_property, wrap_prop
+from funcy import wrap_prop
 
 
 class WebHDFSFileSystem(FileSystem):
@@ -10,6 +12,10 @@ class WebHDFSFileSystem(FileSystem):
     REQUIRES = {"fsspec": "fsspec"}
     PARAM_CHECKSUM = "checksum"
 
+    def __init__(self, fs=None, **kwargs: Any):
+        self._ssl_verify = kwargs.pop("ssl_verify", True)
+        super().__init__(fs, **kwargs)
+
     @classmethod
     def _strip_protocol(cls, path: str) -> str:
         from fsspec.utils import infer_storage_options
@@ -33,7 +39,6 @@ def _get_kwargs_from_urls(urlpath):
         )
 
     def _prepare_credentials(self, **config):
-        self._ssl_verify = config.pop("ssl_verify", True)
         principal = config.pop("kerberos_principal", None)
         if principal:
             config["kerb_kwargs"] = {"principal": principal}
diff --git a/dvc_webhdfs/tests/test_dvc.py b/dvc_webhdfs/tests/test_dvc.py
index 398d051..3dccb5b 100644
--- a/dvc_webhdfs/tests/test_dvc.py
+++ b/dvc_webhdfs/tests/test_dvc.py
@@ -5,7 +5,6 @@
 from dvc.testing.remote_tests import (  # noqa, pylint: disable=unused-import
     TestRemote,
 )
-from dvc.testing.workspace_tests import TestAdd as _TestAdd
 from dvc.testing.workspace_tests import TestImport as _TestImport
 
 
@@ -22,7 +21,7 @@ def workspace(make_workspace):
 class TestImport(_TestImport):
     @pytest.fixture
     def stage_md5(self):
-        return "3869631c193f0a3c206c6f04e84cb2b6"
+        return "f5f3369ef4fa451ddd6ab51f7fb42f7f"
 
     @pytest.fixture
     def is_object_storage(self):
@@ -31,19 +30,3 @@ def is_object_storage(self):
     @pytest.fixture
     def dir_md5(self):
         return "32f6597da5c3c1dead9dc562faac09a2.dir"
-
-
-class TestAdd(_TestAdd):
-    @pytest.fixture
-    def hash_name(self):
-        return "checksum"
-
-    @pytest.fixture
-    def hash_value(self):
-        return (
-            "000002000000000000000000a86fe4d846edc1bf4c355cb6112f141e00000000"
-        )
-
-    @pytest.fixture
-    def dir_hash_value(self):
-        pytest.skip("external outputs are broken for hdfs dirs")