diff --git a/e4e_data_management/cli.py b/e4e_data_management/cli.py
index 295032a..8b670ac 100644
--- a/e4e_data_management/cli.py
+++ b/e4e_data_management/cli.py
@@ -176,13 +176,12 @@ def add_files(args: List[str]):
     parser.add_argument(
         'paths',
         nargs='+',
-        type=Path,
-        required=True
+        type=Path
     )
 
     args = parser.parse_args(args=args)
     paths: List[Path] = args.paths
-    app.add(paths)
+    app.add(paths=paths)
 
 def main():
     """Main function
diff --git a/tests/conftest.py b/tests/conftest.py
index 8cebb7f..51e6642 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,5 +1,6 @@
 '''Common Test Fixtures
 '''
+import random
 from collections import namedtuple
 from pathlib import Path
 from tempfile import TemporaryDirectory
@@ -11,6 +12,7 @@
 
 AppFixture = namedtuple('AppFixture', ['app', 'root'])
 MockAppFixture = namedtuple('MockAppFixture', ['mock', 'app', 'root'])
+DataFixture = namedtuple('DataFixture', ['path', 'n_files', 'file_size'])
 
 @pytest.fixture(name='test_app')
 def create_test_app() -> AppFixture:
@@ -44,3 +46,21 @@ def create_mock_test_app() -> MockAppFixture:
         mock.load.return_value = mock
         with patch('e4e_data_management.cli.DataManager', mock):
             yield MockAppFixture(mock, app, root_dir)
+
+N_FILES = 128
+FILE_SIZE = 1024
+@pytest.fixture(name='test_data')
+def create_test_data() -> DataFixture:
+    """Creates test data
+
+    Returns:
+        DataFixture: Data Fixture
+    """
+    random.seed(0)
+    with TemporaryDirectory() as path:
+        data_dir = Path(path)
+        for file_idx in range(N_FILES):
+            with open(data_dir.joinpath(f'{file_idx:04d}.bin'), 'wb') as handle:
+                data = random.randbytes(FILE_SIZE)
+                handle.write(data)
+        yield DataFixture(data_dir, N_FILES, FILE_SIZE)
diff --git a/tests/test_cli.py b/tests/test_cli.py
index aed5e4d..307b46d 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -41,8 +41,7 @@ def test_init_mission(test_mock_app: Tuple[Mock, DataManager, Path]):
 
     args = split('e4edm init_mission --timestamp 2023-03-02T15:06-08:00 --device Device1 '
                 '--country USA --region California --site SD --name RUN001')
-    with patch('sys.argv', args),\
-            patch('e4e_data_management.cli.DataManager', mock):
+    with patch('sys.argv', args):
         main()
         mock.initialize_mission.assert_called_once_with(
             metadata=Metadata(
@@ -56,3 +55,36 @@ def test_init_mission(test_mock_app: Tuple[Mock, DataManager, Path]):
                 notes=None
             )
         )
+
+def test_add_files(test_mock_app: Tuple[Mock, DataManager, Path], test_data: Tuple[Path, int, int]):
+    """Tests adding files
+
+    Args:
+        test_mock_app (Tuple[Mock, DataManager, Path]): Mock App
+        test_data (Tuple[Path, int, int]): Test Data
+    """
+    mock, app, root_dir = test_mock_app
+    data_dir, _, _ = test_data
+
+    app.initialize_dataset(
+        date=dt.date(2023, 3, 2),
+        project='Test',
+        location='San Diego',
+        directory=root_dir
+    )
+    app.initialize_mission(
+        metadata=Metadata(
+        timestamp=dt.datetime.fromisoformat('2023-03-02T18:35-08:00'),
+        country='USA',
+        region='California',
+        device='Device1',
+        site='SD',
+        mission='TAF001'
+        )
+    )
+
+    bin_files = list(data_dir.rglob('*.bin'))[:2]
+    args = split(f'e4edm add {bin_files[0].as_posix()} {bin_files[1].as_posix()}')
+    with patch('sys.argv', args):
+        main()
+        mock.add.assert_called_once_with(paths=bin_files)