diff --git a/borgmatic/commands/arguments.py b/borgmatic/commands/arguments.py
index b68590b..db50674 100644
--- a/borgmatic/commands/arguments.py
+++ b/borgmatic/commands/arguments.py
@@ -28,19 +28,7 @@ SUBPARSER_ALIASES = {
 }
 
 
-def parse_subparser_arguments(arguments, unparsed_arguments, subparsers):
-    remaining_subparser_arguments = []
-
-    for subparser_name, subparser in reversed(subparsers.items()):
-        if subparser_name not in arguments.keys():
-            continue
-
-        subparser = subparsers[subparser_name]
-        unused_parsed, remaining = subparser.parse_known_args(
-            [argument for argument in unparsed_arguments if argument != subparser_name]
-        )
-        remaining_subparser_arguments.append(remaining)
-
+def get_unparsable_arguments(remaining_subparser_arguments):
     # Determine the remaining arguments that no subparsers have consumed.
     if remaining_subparser_arguments:
         remaining_arguments = [
@@ -128,7 +116,20 @@ def parse_subparser_arguments(unparsed_arguments, subparsers):
 
     # Now ask each subparser, one by one, to greedily consume arguments, from last to first. This
     # allows subparsers to consume arguments before their parent subparsers do.
-    remaining_arguments = parse_subparser_arguments(arguments, unparsed_arguments, subparsers)
+    remaining_subparser_arguments = []
+
+    for subparser_name, subparser in reversed(subparsers.items()):
+        if subparser_name not in arguments.keys():
+            continue
+
+        subparser = subparsers[subparser_name]
+        unused_parsed, remaining = subparser.parse_known_args(
+            [argument for argument in unparsed_arguments if argument != subparser_name]
+        )
+        remaining_subparser_arguments.append(remaining)
+
+    if remaining_subparser_arguments:
+        remaining_arguments = get_unparsable_arguments(remaining_subparser_arguments)
 
     # Special case: If "borg" is present in the arguments, consume all arguments after (+1) the
     # "borg" action.
diff --git a/tests/unit/commands/test_arguments.py b/tests/unit/commands/test_arguments.py
index c532022..ef8fd1e 100644
--- a/tests/unit/commands/test_arguments.py
+++ b/tests/unit/commands/test_arguments.py
@@ -178,19 +178,32 @@ def test_parse_subparser_arguments_raises_error_when_no_subparser_is_specified()
 
 
 @pytest.mark.parametrize(
-    'arguments, unparsed_arguments, subparsers, expected_remaining_arguments',
-      [
+    'arguments, expected',
+    [
         (
-            {'action': flexmock()},
-            ['--verbosity', 'lots'],
-            {'action': flexmock(parse_known_args=lambda arguments: (flexmock(), ['--verbosity', 'lots']))},
-            ['--verbosity', 'lots'],
+            (
+                ('--latest', 'archive', 'prune', 'extract', 'list', '--test-flag'),
+                ('--latest', 'archive', 'check', 'extract', 'list', '--test-flag'),
+                ('prune', 'check', 'list', '--test-flag'),
+                ('prune', 'check', 'extract', '--test-flag'),
+            ),
+            [
+                '--test-flag',
+            ],
         ),
+        (
+            (
+                ('--latest', 'archive', 'prune', 'extract', 'list'),
+                ('--latest', 'archive', 'check', 'extract', 'list'),
+                ('prune', 'check', 'list'),
+                ('prune', 'check', 'extract'),
+            ),
+            [],
+        ),
+        ((), []),
     ],
 )
-def test_get_remaining_arguments_returns_expected_remaining_arguments(
-    arguments, unparsed_arguments, subparsers, expected_remaining_arguments
+def test_get_unparsable_arguments_returns_remaining_arguments_that_no_subparser_can_parse(
+    arguments, expected
 ):
-    remaining_arguments = module.get_remaining_arguments(arguments, unparsed_arguments, subparsers)
-
-    assert remaining_arguments == expected_remaining_arguments
\ No newline at end of file
+    assert module.get_unparsable_arguments(arguments) == expected