diff --git a/tests/unit/commands/test_completions.py b/tests/unit/commands/test_completions.py
index 4cc1f456..4de34fe7 100644
--- a/tests/unit/commands/test_completions.py
+++ b/tests/unit/commands/test_completions.py
@@ -2,7 +2,12 @@ from argparse import Action
 
 import pytest
 
-from borgmatic.commands.completion import has_exact_options, has_file_options
+from borgmatic.commands.completion import (
+    has_choice_options,
+    has_exact_options,
+    has_file_options,
+    has_unknown_required_param_options,
+)
 
 file_options_test_data = [
     (Action('--flag', 'flag'), False),
@@ -19,3 +24,38 @@ def test_has_file_options_detects_file_options(action: Action, expected: bool):
     # if has_file_options(action) was true, has_exact_options(action) should also be true
     if expected:
         assert has_exact_options(action)
+
+
+choices_test_data = [
+    (Action('--flag', 'flag'), False),
+    (Action('--flag', 'flag', choices=['a', 'b']), True),
+    (Action('--flag', 'flag', choices=None), False),
+]
+
+
+@pytest.mark.parametrize('action, expected', choices_test_data)
+def test_has_choice_options_detects_choice_options(action: Action, expected: bool):
+    assert has_choice_options(action) == expected
+    # if has_choice_options(action) was true, has_exact_options(action) should also be true
+    if expected:
+        assert has_exact_options(action)
+
+
+unknown_required_param_test_data = [
+    (Action('--flag', 'flag'), False),
+    (Action('--flag', 'flag', required=True), True),
+    *((Action('--flag', 'flag', nargs=nargs), True) for nargs in ('+', '*')),
+    *((Action('--flag', 'flag', metavar=metavar), True) for metavar in ('PATTERN', 'KEYS', 'N')),
+    *((Action('--flag', 'flag', type=type, default=None), True) for type in (int, str)),
+    (Action('--flag', 'flag', type=int, default=1), False),
+]
+
+
+@pytest.mark.parametrize('action, expected', unknown_required_param_test_data)
+def test_has_unknown_required_param_options_detects_unknown_required_param_options(
+    action: Action, expected: bool
+):
+    assert has_unknown_required_param_options(action) == expected
+    # if has_unknown_required_param_options(action) was true, has_exact_options(action) should also be true
+    if expected:
+        assert has_exact_options(action)