diff --git a/tests/test_cli.py b/tests/test_cli.py
index 7219684c..16c9868f 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -139,3 +139,40 @@ class MyTests(unittest.TestCase):
 
         for test_dict, expected_json in zip(test_input, expected_output):
             self.assertEqual(jc.cli.json_out(test_dict), expected_json)
+
+    def test_cli_json_out_monoc(self):
+        test_input = [
+            None,
+            {},
+            [],
+            '',
+            {"key1": "value1", "key2": 2, "key3": None, "key4": 3.14, "key5": True},
+        ]
+
+        expected_output = [
+            'null',
+            '{}',
+            '[]',
+            '""',
+            '{"key1": "value1", "key2": 2, "key3": null, "key4": 3.14, "key5": true}'
+        ]
+
+        for test_dict, expected_json in zip(test_input, expected_output):
+            self.assertEqual(jc.cli.json_out(test_dict, mono=True), expected_json)
+
+    def test_cli_json_out_pretty(self):
+        test_input = [
+            {"key1": "value1", "key2": 2, "key3": None, "key4": 3.14, "key5": True},
+            {"key1": [{"subkey1": "subvalue1"}, {"subkey2": [1, 2, 3]}], "key2": True}
+        ]
+
+        expected_output = [
+            '{\n  \x1b[34;01m"key1"\x1b[39;00m: \x1b[32m"value1"\x1b[39m,\n  \x1b[34;01m"key2"\x1b[39;00m: \x1b[35m2\x1b[39m,\n  \x1b[34;01m"key3"\x1b[39;00m: \x1b[90mnull\x1b[39m,\n  \x1b[34;01m"key4"\x1b[39;00m: \x1b[35m3.14\x1b[39m,\n  \x1b[34;01m"key5"\x1b[39;00m: \x1b[90mtrue\x1b[39m\n}',
+            '{\n  \x1b[34;01m"key1"\x1b[39;00m: [\n    {\n      \x1b[34;01m"subkey1"\x1b[39;00m: \x1b[32m"subvalue1"\x1b[39m\n    },\n    {\n      \x1b[34;01m"subkey2"\x1b[39;00m: [\n        \x1b[35m1\x1b[39m,\n        \x1b[35m2\x1b[39m,\n        \x1b[35m3\x1b[39m\n      ]\n    }\n  ],\n  \x1b[34;01m"key2"\x1b[39;00m: \x1b[90mtrue\x1b[39m\n}'
+        ]
+
+        for test_dict, expected_json in zip(test_input, expected_output):
+            self.assertEqual(jc.cli.json_out(test_dict, pretty=True), expected_json)
+
+    def test_cli_about_jc(self):
+        self.assertEqual(jc.cli.about_jc()['name'], 'jc')