diff --git a/src/borg/archiver/__init__.py b/src/borg/archiver/__init__.py
index 34312cc2d..4df887479 100644
--- a/src/borg/archiver/__init__.py
+++ b/src/borg/archiver/__init__.py
@@ -27,7 +27,7 @@ try:
     import signal
     from datetime import datetime, timezone
 
-    from jsonargparse import ArgumentParser
+    from jsonargparse import ArgumentParser, Namespace, SUPPRESS
 
     from ..logger import create_logger, setup_logging
 
@@ -268,14 +268,14 @@ class Archiver(
                         # Note: We control all inputs.
                         kwargs["help"] = kwargs["help"] % kwargs
                         if not is_append:
-                            kwargs["default"] = argparse.SUPPRESS
+                            kwargs["default"] = SUPPRESS
 
                 common_group.add_argument(*args, **kwargs)
 
             common_group = parser.add_argument_group("Common options")
             self.define_common_options(add_argument)
 
-        def resolve(self, args: argparse.Namespace):  # Namespace has "in" but otherwise is not like a dict.
+        def resolve(self, args: Namespace):  # Namespace has "in" but otherwise is not like a dict.
             """
             Resolve the multiple definitions of each common option to the final value.
             """
diff --git a/src/borg/archiver/_common.py b/src/borg/archiver/_common.py
index 26ccee9bc..302eefedc 100644
--- a/src/borg/archiver/_common.py
+++ b/src/borg/archiver/_common.py
@@ -1,8 +1,9 @@
-import argparse
 import functools
 import os
 import textwrap
 
+from jsonargparse import SUPPRESS
+
 import borg
 from ..archive import Archive
 from ..constants import *  # NOQA
@@ -269,8 +270,8 @@ def process_epilog(epilog):
 
 
 def define_exclude_and_patterns(add_option, *, tag_files=False, strip_components=False):
-    add_option("--pattern-roots-internal", dest="pattern_roots", action="append", default=[], help=argparse.SUPPRESS)
-    add_option("--patterns-internal", dest="patterns", action="append", default=[], help=argparse.SUPPRESS)
+    add_option("--pattern-roots-internal", dest="pattern_roots", action="append", default=[], help=SUPPRESS)
+    add_option("--patterns-internal", dest="patterns", action="append", default=[], help=SUPPRESS)
     add_option(
         "-e",
         "--exclude",
diff --git a/src/borg/archiver/lock_cmds.py b/src/borg/archiver/lock_cmds.py
index 0e5e251f2..03ab393a3 100644
--- a/src/borg/archiver/lock_cmds.py
+++ b/src/borg/archiver/lock_cmds.py
@@ -1,7 +1,7 @@
 import argparse
 import subprocess
 
-from jsonargparse import ArgumentParser
+from jsonargparse import ArgumentParser, REMAINDER
 
 from ._common import with_repository
 from ..cache import Cache
@@ -86,4 +86,4 @@ class LocksMixIn:
         )
         subparsers.add_subcommand("with-lock", subparser, help="run a user command with the lock held")
         subparser.add_argument("command", metavar="COMMAND", help="command to run")
-        subparser.add_argument("args", metavar="ARGS", nargs=argparse.REMAINDER, help="command arguments")
+        subparser.add_argument("args", metavar="ARGS", nargs=REMAINDER, help="command arguments")
diff --git a/src/borg/helpers/jap_helpers.py b/src/borg/helpers/jap_helpers.py
index 95c4f0456..80691b379 100644
--- a/src/borg/helpers/jap_helpers.py
+++ b/src/borg/helpers/jap_helpers.py
@@ -1,14 +1,14 @@
-import argparse
+from jsonargparse import Namespace
 from typing import Any
 
 
-def flatten_namespace(ns: Any) -> argparse.Namespace:
+def flatten_namespace(ns: Any) -> Namespace:
     """
     Recursively flattens a nested namespace into a single-level namespace.
     JSONArgparse uses nested namespaces for subcommands, whereas borg's
     internal dispatch and logic expect a flat namespace.
     """
-    flat = argparse.Namespace()
+    flat = Namespace()
 
     # Extract the nested path of subcommands
     subcmds = []
@@ -25,7 +25,7 @@ def flatten_namespace(ns: Any) -> argparse.Namespace:
             vars(source).items() if hasattr(source, "__dict__") else source.items() if hasattr(source, "items") else []
         )
         for k, v in items:
-            if isinstance(v, argparse.Namespace) or type(v).__name__ == "Namespace":
+            if isinstance(v, Namespace) or type(v).__name__ == "Namespace":
                 _flatten(v, target)
             else:
                 if k != "subcommand" and not hasattr(target, k):