diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 45c5ef8..e4ecaf9 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,7 +21,7 @@ jobs:
       - name: Run AoC 2015
         run: |
           cd 2015
-          python -m unittest *.py
+          pytest
 
   AoC-2017:
     runs-on: ubuntu-latest
diff --git a/2015/README.md b/2015/README.md
index 67d48d7..8e3ecad 100644
--- a/2015/README.md
+++ b/2015/README.md
@@ -11,5 +11,5 @@ Only Linux has been tested. Other platforms might just work though.
 ## Compile & run
 
 ```bash
-python -m unittest *.py
+pytest
 ```
diff --git a/2015/day00.py b/2015/day00.py
deleted file mode 100644
index e23c0fd..0000000
--- a/2015/day00.py
+++ /dev/null
@@ -1,14 +0,0 @@
-import unittest
-
-from util import read_input
-
-
-class Day01(unittest.TestCase):
-
-    def test_part01(self):
-        input_data = read_input("day00-input.txt")
-
-        self.assertEqual(input_data, '0')
-
-if __name__ == '__main__':
-    unittest.main()
diff --git a/2015/day01.py b/2015/day01.py
deleted file mode 100644
index aee0e33..0000000
--- a/2015/day01.py
+++ /dev/null
@@ -1,18 +0,0 @@
-import unittest
-
-from util import read_input
-
-
-class Day00(unittest.TestCase):
-
-    def test_part01(self):
-        input_data = read_input("day01-input.txt")
-
-        up = input_data.count(')')
-        down = input_data.count('(')
-        floor = abs(up - down)
-
-        self.assertEqual(floor, 138)
-
-if __name__ == '__main__':
-    unittest.main()
diff --git a/2015/test_day00.py b/2015/test_day00.py
new file mode 100644
index 0000000..f3d3319
--- /dev/null
+++ b/2015/test_day00.py
@@ -0,0 +1,7 @@
+from util import read_input
+
+
+def test_part01():
+    input_data = read_input("day00-input.txt")
+
+    assert input_data == '0'
diff --git a/2015/test_day01.py b/2015/test_day01.py
new file mode 100644
index 0000000..a56a3af
--- /dev/null
+++ b/2015/test_day01.py
@@ -0,0 +1,11 @@
+from util import read_input
+
+
+def test_part01():
+    input_data = read_input("day01-input.txt")
+
+    up = input_data.count(')')
+    down = input_data.count('(')
+    floor = abs(up - down)
+
+    assert floor == 138