diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/unit/__init__.py b/tests/unit/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/unit/miniscord/__init__.py b/tests/unit/miniscord/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/unit/miniscord/test_discord_utils.py b/tests/unit/miniscord/test_discord_utils.py
new file mode 100644
index 0000000..74223df
--- /dev/null
+++ b/tests/unit/miniscord/test_discord_utils.py
@@ -0,0 +1,47 @@
+from unittest import TestCase
+import asyncio
+from unittest.mock import Mock, AsyncMock
+import discord
+from miniscord._discord_utils import delete_message, message_id
+
+
+class TestDeleteMessage(TestCase):
+    def setUp(self):
+        self.loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(None)
+
+    def tearDown(self):
+        self.loop.close()
+
+    def test_success(self):
+        mock = AsyncMock()
+        self.assertTrue(self.loop.run_until_complete(delete_message(mock)))
+        mock.delete.assert_awaited_once()
+
+    def test_forbidden(self):
+        mock = AsyncMock()
+        mock.delete.side_effect = discord.Forbidden(Mock(), "")
+        self.assertFalse(self.loop.run_until_complete(delete_message(mock)))
+        mock.delete.assert_awaited_once()
+
+    def test_not_found(self):
+        mock = AsyncMock()
+        mock.delete.side_effect = discord.NotFound(Mock(), "")
+        self.assertFalse(self.loop.run_until_complete(delete_message(mock)))
+        mock.delete.assert_awaited_once()
+
+
+class TestMessageId(TestCase):
+    def test_direct(self):
+        mock = Mock()
+        mock.channel.type = discord.ChannelType.private
+        mock.author.id = "TEST"
+        self.assertEqual("TEST", message_id(mock))
+
+    def test_not_direct(self):
+        mock = Mock()
+        mock.channel.type = discord.ChannelType.text
+        mock.guild.id = "TEST1"
+        mock.channel.id = "TEST2"
+        mock.author.id = "TEST3"
+        self.assertEqual("TEST1/TEST2/TEST3", message_id(mock))
diff --git a/tests/unit/miniscord/test_utils.py b/tests/unit/miniscord/test_utils.py
new file mode 100644
index 0000000..75674c5
--- /dev/null
+++ b/tests/unit/miniscord/test_utils.py
@@ -0,0 +1,39 @@
+from unittest import TestCase
+from miniscord._utils import sanitize_input, parse_arguments
+
+
+class TestSanitizeInput(TestCase):
+    def test_no_change(self):
+        self.assertEqual("abc 0_9", sanitize_input("abc 0_9"))
+
+    def test_lower_trim(self):
+        self.assertEqual("abc", sanitize_input("  ABC  "))
+
+    def test_remove_special_chars(self):
+        self.assertEqual("hello id  some command", sanitize_input("Hello <@id> ! `some command`"))
+
+
+class TestParseArguments(TestCase):
+    def test_empty(self):
+        self.assertEqual([], parse_arguments(""))
+
+    def test_single_arg(self):
+        self.assertEqual(["abc"], parse_arguments("abc"))
+
+    def test_multi_args(self):
+        self.assertEqual(["abc", "def", "ghi"], parse_arguments("abc def ghi"))
+
+    def test_quotes(self):
+        self.assertEqual(["abc def"], parse_arguments("'abc def'"))
+
+    def test_quotes_squotes(self):
+        self.assertEqual(["abc 'def'"], parse_arguments("\"abc 'def'\""))
+
+    def test_squotes(self):
+        self.assertEqual(["abc def"], parse_arguments("\"abc def\""))
+
+    def test_squotes_quotes(self):
+        self.assertEqual(["\"abc\" def"], parse_arguments("'\"abc\" def'"))
+
+    def test_complex(self):
+        self.assertEqual(["abc 'def'", "ghi", "jkl mno"], parse_arguments("\"abc 'def'\" ghi 'jkl mno'"))