diff --git a/tests/test_cliutil.py b/tests/test_cliutil.py
index c1314c8055ff18e08b5f6d92c6d7231af7cca107..19dc17010d4d3b59bf7f4dc83449b72fee0e2a94 100644
--- a/tests/test_cliutil.py
+++ b/tests/test_cliutil.py
@@ -21,12 +21,18 @@ import inspect
 import logging
 import os
 import re
+import sys
 import traceback
 
 import pytest
 
+from pathlib import Path
+
 from conservancy_beancount import cliutil
 
+FILE_NAMES = ['-foobar', '-foo.bin']
+STREAM_PATHS = [None, Path('-')]
+
 class AlwaysEqual:
     def __eq__(self, other):
         return True
@@ -57,6 +63,45 @@ def argparser():
     cliutil.add_version_argument(parser)
     return parser
 
+@pytest.mark.parametrize('path_name', FILE_NAMES)
+def test_bytes_output_path(path_name, tmp_path):
+    path = tmp_path / path_name
+    stream = io.BytesIO()
+    actual = cliutil.bytes_output(path, stream)
+    assert actual is not stream
+    assert str(actual.name) == str(path)
+    assert 'w' in actual.mode
+    assert 'b' in actual.mode
+
+@pytest.mark.parametrize('path', STREAM_PATHS)
+def test_bytes_output_stream(path):
+    stream = io.BytesIO()
+    actual = cliutil.bytes_output(path, stream)
+    assert actual is stream
+
+@pytest.mark.parametrize('func_name', [
+    'bytes_output',
+    'text_output',
+])
+def test_default_output(func_name):
+    actual = getattr(cliutil, func_name)()
+    assert actual.fileno() == sys.stdout.fileno()
+
+@pytest.mark.parametrize('path_name', FILE_NAMES)
+def test_text_output_path(path_name, tmp_path):
+    path = tmp_path / path_name
+    stream = io.StringIO()
+    actual = cliutil.text_output(path, stream)
+    assert actual is not stream
+    assert str(actual.name) == str(path)
+    assert 'w' in actual.mode
+
+@pytest.mark.parametrize('path', STREAM_PATHS)
+def test_text_output_stream(path):
+    stream = io.StringIO()
+    actual = cliutil.text_output(path, stream)
+    assert actual is stream
+
 @pytest.mark.parametrize('errnum', [
     errno.EACCES,
     errno.EPERM,