diff --git a/pyproject.toml b/pyproject.toml
index 21d5da6..0cd09a2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,3 +11,6 @@ dependencies = [
     "pydantic>=2.10.6",
     "python-dotenv>=1.0.1",
 ]
+
+[dependency-groups]
+dev = ["pytest>=8.3.5"]
diff --git a/src/tests/conftest.py b/src/tests/conftest.py
new file mode 100644
index 0000000..a154f98
--- /dev/null
+++ b/src/tests/conftest.py
@@ -0,0 +1,4 @@
+import sys
+import os
+
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
diff --git a/src/tests/github_test.py b/src/tests/github_test.py
new file mode 100644
index 0000000..7dbd817
--- /dev/null
+++ b/src/tests/github_test.py
@@ -0,0 +1,33 @@
+import apis.github as ghapi
+
+
+def test_can_fetch_user():
+    ghapi.get_user("ghost")
+
+
+def test_can_fetch_repo():
+    ghapi.get_repo("octocat/Spoon-Knife")
+
+
+def test_repo_is_accurate():
+    repo = ghapi.get_repo("octocat/Spoon-Knife")
+    assert repo.full_name == "octocat/Spoon-Knife"
+    assert repo.description == "This repo is for demonstration purposes only."
+    assert repo.owner.login == "octocat"
+
+
+def test_repo_is_case_insensitive():
+    repo = ghapi.get_repo("OCTOCAT/SPOON-KNIFE")
+    assert repo.full_name == "octocat/Spoon-Knife"
+    assert repo.description == "This repo is for demonstration purposes only."
+    assert repo.owner.login == "octocat"
+
+    repo = ghapi.get_repo("octocat/spoon-knife")
+    assert repo.full_name == "octocat/Spoon-Knife"
+    assert repo.description == "This repo is for demonstration purposes only."
+    assert repo.owner.login == "octocat"
+
+    repo = ghapi.get_repo("OCTOCAT/spoon-knife")
+    assert repo.full_name == "octocat/Spoon-Knife"
+    assert repo.description == "This repo is for demonstration purposes only."
+    assert repo.owner.login == "octocat"
diff --git a/src/tests/tictactoe_test.py b/src/tests/tictactoe_test.py
new file mode 100644
index 0000000..24aec26
--- /dev/null
+++ b/src/tests/tictactoe_test.py
@@ -0,0 +1,59 @@
+import games.tictactoe as ttt
+import pytest
+
+
+def test_initializes_correctly():
+    game = ttt.TicTacToe()
+    assert game.playfield == [[ttt.Players.Nothing] * 3] * 3
+    assert game.current_turn == ttt.Players.Knots
+
+
+def test_does_not_allow_placing_twice():
+    game = ttt.TicTacToe()
+    game.play_move(0, 0)
+
+    with pytest.raises(ValueError):
+        game.play_move(0, 0)
+
+
+def test_switches_turns_correctly():
+    game = ttt.TicTacToe()
+    game.play_move(0, 0)
+    assert game.current_turn == ttt.Players.Crosses
+    game.play_move(1, 1)
+    assert game.current_turn == ttt.Players.Knots
+
+
+def test_detects_winner():
+    game = ttt.TicTacToe()
+    game.play_move(0, 0)  # Knots
+    game.play_move(1, 0)  # Crosses
+    game.play_move(0, 1)  # Knots
+    game.play_move(1, 1)  # Crosses
+    game.play_move(0, 2)  # Knots wins
+    assert game.checkpoint.win_state == ttt.WinState.Knots
+
+
+def test_detects_crosses_winner():
+    game = ttt.TicTacToe()
+    game.play_move(0, 0)  # Knots
+    game.play_move(1, 0)  # Crosses
+    game.play_move(0, 1)  # Knots
+    game.play_move(1, 1)  # Crosses
+    game.play_move(2, 2)  # Knots
+    game.play_move(1, 2)  # Crosses wins
+    assert game.checkpoint.win_state == ttt.WinState.Crosses
+
+
+def test_detects_draw():
+    game = ttt.TicTacToe()
+    game.play_move(0, 0)  # Knots
+    game.play_move(0, 1)  # Crosses
+    game.play_move(0, 2)  # Knots
+    game.play_move(1, 1)  # Crosses
+    game.play_move(1, 0)  # Knots
+    game.play_move(1, 2)  # Crosses
+    game.play_move(2, 1)  # Knots
+    game.play_move(2, 0)  # Crosses
+    game.play_move(2, 2)  # Knots - Draw
+    assert game.checkpoint.win_state == ttt.WinState.Draw
diff --git a/src/tests/toki_pona_test.py b/src/tests/toki_pona_test.py
new file mode 100644
index 0000000..695d86c
--- /dev/null
+++ b/src/tests/toki_pona_test.py
@@ -0,0 +1,17 @@
+import apis.sona as sonaapi
+
+
+def test_can_get_word():
+    sonaapi.get_word("toki")
+
+
+def test_word_type_is_correct():
+    assert type(sonaapi.get_word("toki")) is sonaapi.Word
+
+
+def test_word_has_stats():
+    word = sonaapi.get_word("toki")
+    assert word.word == "toki"
+    assert word.book == sonaapi.Book.Pu
+    assert word.coined_era == sonaapi.CoinedEra.PrePu
+    assert word.creator == ["jan Sonja"]
diff --git a/src/tests/xkcd_test.py b/src/tests/xkcd_test.py
new file mode 100644
index 0000000..6b08fb6
--- /dev/null
+++ b/src/tests/xkcd_test.py
@@ -0,0 +1,15 @@
+import apis.xkcd as xkcdapi
+
+
+def test_can_fetch():
+    xkcdapi.get_comic(353)
+
+
+def test_is_comic():
+    assert type(xkcdapi.get_comic(353)) is xkcdapi.Comic
+
+
+def test_comic_has_stats():
+    comic = xkcdapi.get_comic(353)
+    assert comic.num == 353
+    assert comic.title == "Python"
diff --git a/uv.lock b/uv.lock
index 0db911f..9455720 100644
--- a/uv.lock
+++ b/uv.lock
@@ -170,6 +170,11 @@ dependencies = [
     { name = "python-dotenv" },
 ]
 
+[package.dev-dependencies]
+dev = [
+    { name = "pytest" },
+]
+
 [package.metadata]
 requires-dist = [
     { name = "discord-py", specifier = ">=2.5.2" },
@@ -179,6 +184,9 @@ requires-dist = [
     { name = "python-dotenv", specifier = ">=1.0.1" },
 ]
 
+[package.metadata.requires-dev]
+dev = [{ name = "pytest", specifier = ">=8.3.5" }]
+
 [[package]]
 name = "frozenlist"
 version = "1.5.0"
@@ -249,6 +257,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/76/c6/c88e154df9c4e1a2a66ccf0005a88dfb2650c1dffb6f5ce603dfbd452ce3/idna-3.10-py3-none-any.whl", hash = "sha256:946d195a0d259cbba61165e88e65941f16e9b36ea6ddb97f00452bae8b1287d3", size = 70442 },
 ]
 
+[[package]]
+name = "iniconfig"
+version = "2.0.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/d7/4b/cbd8e699e64a6f16ca3a8220661b5f83792b3017d0f79807cb8708d33913/iniconfig-2.0.0.tar.gz", hash = "sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3", size = 4646 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/ef/a6/62565a6e1cf69e10f5727360368e451d4b7f58beeac6173dc9db836a5b46/iniconfig-2.0.0-py3-none-any.whl", hash = "sha256:b6a85871a79d2e3b22d2d1b94ac2824226a63c6b741c88f7ae975f18b6778374", size = 5892 },
+]
+
 [[package]]
 name = "loguru"
 version = "0.7.3"
@@ -286,6 +303,24 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/99/b7/b9e70fde2c0f0c9af4cc5277782a89b66d35948ea3369ec9f598358c3ac5/multidict-6.1.0-py3-none-any.whl", hash = "sha256:48e171e52d1c4d33888e529b999e5900356b9ae588c2f09a52dcefb158b27506", size = 10051 },
 ]
 
+[[package]]
+name = "packaging"
+version = "24.2"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/d0/63/68dbb6eb2de9cb10ee4c9c14a0148804425e13c4fb20d61cce69f53106da/packaging-24.2.tar.gz", hash = "sha256:c228a6dc5e932d346bc5739379109d49e8853dd8223571c7c5b55260edc0b97f", size = 163950 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/88/ef/eb23f262cca3c0c4eb7ab1933c3b1f03d021f2c48f54763065b6f0e321be/packaging-24.2-py3-none-any.whl", hash = "sha256:09abb1bccd265c01f4a3aa3f7a7db064b36514d2cba19a2f694fe6150451a759", size = 65451 },
+]
+
+[[package]]
+name = "pluggy"
+version = "1.5.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/96/2d/02d4312c973c6050a18b314a5ad0b3210edb65a906f868e31c111dede4a6/pluggy-1.5.0.tar.gz", hash = "sha256:2cffa88e94fdc978c4c574f15f9e59b7f4201d439195c3715ca9e2486f1d0cf1", size = 67955 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/88/5f/e351af9a41f866ac3f1fac4ca0613908d9a41741cfcf2228f4ad853b697d/pluggy-1.5.0-py3-none-any.whl", hash = "sha256:44e1ad92c8ca002de6377e165f3e0f1be63266ab4d554740532335b9d75ea669", size = 20556 },
+]
+
 [[package]]
 name = "propcache"
 version = "0.3.0"
@@ -366,6 +401,21 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/51/b2/b2b50d5ecf21acf870190ae5d093602d95f66c9c31f9d5de6062eb329ad1/pydantic_core-2.27.2-cp313-cp313-win_arm64.whl", hash = "sha256:ac4dbfd1691affb8f48c2c13241a2e3b60ff23247cbcf981759c768b6633cf8b", size = 1885186 },
 ]
 
+[[package]]
+name = "pytest"
+version = "8.3.5"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "colorama", marker = "sys_platform == 'win32'" },
+    { name = "iniconfig" },
+    { name = "packaging" },
+    { name = "pluggy" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/ae/3c/c9d525a414d506893f0cd8a8d0de7706446213181570cdbd766691164e40/pytest-8.3.5.tar.gz", hash = "sha256:f4efe70cc14e511565ac476b57c279e12a855b11f48f212af1080ef2263d3845", size = 1450891 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/30/3d/64ad57c803f1fa1e963a7946b6e0fea4a70df53c1a7fed304586539c2bac/pytest-8.3.5-py3-none-any.whl", hash = "sha256:c69214aa47deac29fad6c2a4f590b9c4a9fdb16a403176fe154b79c0b4d4d820", size = 343634 },
+]
+
 [[package]]
 name = "python-dotenv"
 version = "1.0.1"