diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..86c6b68
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,31 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.x
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Run tests
+        run: |
+          python -m unittest discover -s leetcode -p '*test.py'
diff --git a/commit b/commit
old mode 100755
new mode 100644
index 4c4ba8f..3446a8d
--- a/commit
+++ b/commit
@@ -10,6 +10,9 @@ def main():
     # Format with Deno
     subprocess.run(["deno", "fmt", "."], check=True)
     
+    # Run tests
+    subprocess.run(["python3", "-m", "unittest", "discover"], check=True)
+    
     # Git add all changes
     subprocess.run(["git", "add", "."], check=True)
     
@@ -25,4 +28,4 @@ def main():
     subprocess.run(["git", "push"], check=True)
 
 if __name__ == "__main__":
-    main()
\ No newline at end of file
+    main()
diff --git a/leetcode/01-two-sum/two_sum_test.py b/leetcode/01-two-sum/two_sum_test.py
new file mode 100644
index 0000000..cc66d68
--- /dev/null
+++ b/leetcode/01-two-sum/two_sum_test.py
@@ -0,0 +1,24 @@
+import unittest
+from two_sum import Solution
+
+class TestTwoSum(unittest.TestCase):
+    def setUp(self):
+        self.solution = Solution()
+
+    def test_example_case(self):
+        self.assertEqual(self.solution.twoSum([2, 7, 11, 15], 9), [1, 0])
+
+    def test_no_solution(self):
+        self.assertIsNone(self.solution.twoSum([1, 2, 3], 7))
+
+    def test_multiple_solutions(self):
+        self.assertEqual(self.solution.twoSum([1, 2, 3, 4, 5], 6), [3, 1])
+
+    def test_negative_numbers(self):
+        self.assertEqual(self.solution.twoSum([-1, -2, -3, -4, -5], -8), [4, 2])
+
+    def test_mixed_numbers(self):
+        self.assertEqual(self.solution.twoSum([-1, 2, 3, -4, 5], 1), [4, 0])
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/leetcode/21-merge-two-sorted-lists/implementation_test.py b/leetcode/21-merge-two-sorted-lists/implementation_test.py
new file mode 100644
index 0000000..25f5a81
--- /dev/null
+++ b/leetcode/21-merge-two-sorted-lists/implementation_test.py
@@ -0,0 +1,44 @@
+import unittest
+from implementation import Solution, ListNode
+
+class TestDeleteDuplicates(unittest.TestCase):
+    def setUp(self):
+        self.solution = Solution()
+
+    def list_to_linkedlist(self, elements):
+        head = ListNode(elements[0])
+        current = head
+        for element in elements[1:]:
+            current.next = ListNode(element)
+            current = current.next
+        return head
+
+    def linkedlist_to_list(self, head):
+        elements = []
+        while head:
+            elements.append(head.val)
+            head = head.next
+        return elements
+
+    def test_example_case(self):
+        head = self.list_to_linkedlist([1, 1, 2])
+        result = self.solution.deleteDuplicates(head)
+        self.assertEqual(self.linkedlist_to_list(result), [1, 2])
+
+    def test_no_duplicates(self):
+        head = self.list_to_linkedlist([1, 2, 3])
+        result = self.solution.deleteDuplicates(head)
+        self.assertEqual(self.linkedlist_to_list(result), [1, 2, 3])
+
+    def test_all_duplicates(self):
+        head = self.list_to_linkedlist([1, 1, 1])
+        result = self.solution.deleteDuplicates(head)
+        self.assertEqual(self.linkedlist_to_list(result), [1])
+
+    def test_mixed_duplicates(self):
+        head = self.list_to_linkedlist([1, 1, 2, 3, 3])
+        result = self.solution.deleteDuplicates(head)
+        self.assertEqual(self.linkedlist_to_list(result), [1, 2, 3])
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/leetcode/21-merge-two-sorted-lists/slow_test.py b/leetcode/21-merge-two-sorted-lists/slow_test.py
new file mode 100644
index 0000000..01c96f7
--- /dev/null
+++ b/leetcode/21-merge-two-sorted-lists/slow_test.py
@@ -0,0 +1,54 @@
+import unittest
+from slow import Solution, ListNode
+
+class TestMergeTwoLists(unittest.TestCase):
+    def setUp(self):
+        self.solution = Solution()
+
+    def list_to_linkedlist(self, elements):
+        head = ListNode(elements[0])
+        current = head
+        for element in elements[1:]:
+            current.next = ListNode(element)
+            current = current.next
+        return head
+
+    def linkedlist_to_list(self, head):
+        elements = []
+        while head:
+            elements.append(head.val)
+            head = head.next
+        return elements
+
+    def test_example_case(self):
+        list1 = self.list_to_linkedlist([1, 2, 4])
+        list2 = self.list_to_linkedlist([1, 3, 4])
+        result = self.solution.mergeTwoLists(list1, list2)
+        self.assertEqual(self.linkedlist_to_list(result), [1, 1, 2, 3, 4, 4])
+
+    def test_empty_lists(self):
+        list1 = self.list_to_linkedlist([])
+        list2 = self.list_to_linkedlist([])
+        result = self.solution.mergeTwoLists(list1, list2)
+        self.assertEqual(self.linkedlist_to_list(result), [])
+
+    def test_one_empty_list(self):
+        list1 = self.list_to_linkedlist([1, 2, 3])
+        list2 = self.list_to_linkedlist([])
+        result = self.solution.mergeTwoLists(list1, list2)
+        self.assertEqual(self.linkedlist_to_list(result), [1, 2, 3])
+
+    def test_no_overlap(self):
+        list1 = self.list_to_linkedlist([1, 2, 3])
+        list2 = self.list_to_linkedlist([4, 5, 6])
+        result = self.solution.mergeTwoLists(list1, list2)
+        self.assertEqual(self.linkedlist_to_list(result), [1, 2, 3, 4, 5, 6])
+
+    def test_all_overlap(self):
+        list1 = self.list_to_linkedlist([1, 1, 1])
+        list2 = self.list_to_linkedlist([1, 1, 1])
+        result = self.solution.mergeTwoLists(list1, list2)
+        self.assertEqual(self.linkedlist_to_list(result), [1, 1, 1, 1, 1, 1])
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/leetcode/35-search-insert-position/binary_search_test.py b/leetcode/35-search-insert-position/binary_search_test.py
new file mode 100644
index 0000000..16b324d
--- /dev/null
+++ b/leetcode/35-search-insert-position/binary_search_test.py
@@ -0,0 +1,24 @@
+import unittest
+from binary_search import Solution
+
+class TestSearchInsert(unittest.TestCase):
+    def setUp(self):
+        self.solution = Solution()
+
+    def test_example_case(self):
+        self.assertEqual(self.solution.searchInsert([1, 3, 5, 6], 5), 2)
+
+    def test_insert_position(self):
+        self.assertEqual(self.solution.searchInsert([1, 3, 5, 6], 2), 1)
+
+    def test_insert_at_end(self):
+        self.assertEqual(self.solution.searchInsert([1, 3, 5, 6], 7), 4)
+
+    def test_insert_at_start(self):
+        self.assertEqual(self.solution.searchInsert([1, 3, 5, 6], 0), 0)
+
+    def test_empty_list(self):
+        self.assertEqual(self.solution.searchInsert([], 5), 0)
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/leetcode/35-search-insert-position/simple_test.py b/leetcode/35-search-insert-position/simple_test.py
new file mode 100644
index 0000000..f6ac1db
--- /dev/null
+++ b/leetcode/35-search-insert-position/simple_test.py
@@ -0,0 +1,24 @@
+import unittest
+from simple import Solution
+
+class TestSearchInsert(unittest.TestCase):
+    def setUp(self):
+        self.solution = Solution()
+
+    def test_example_case(self):
+        self.assertEqual(self.solution.searchInsert([1, 3, 5, 6], 5), 2)
+
+    def test_insert_position(self):
+        self.assertEqual(self.solution.searchInsert([1, 3, 5, 6], 2), 1)
+
+    def test_insert_at_end(self):
+        self.assertEqual(self.solution.searchInsert([1, 3, 5, 6], 7), 4)
+
+    def test_insert_at_start(self):
+        self.assertEqual(self.solution.searchInsert([1, 3, 5, 6], 0), 0)
+
+    def test_empty_list(self):
+        self.assertEqual(self.solution.searchInsert([], 5), 0)
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/leetcode/704-binary-search/normal_python_test.py b/leetcode/704-binary-search/normal_python_test.py
new file mode 100644
index 0000000..49a4e4e
--- /dev/null
+++ b/leetcode/704-binary-search/normal_python_test.py
@@ -0,0 +1,27 @@
+import unittest
+from normal_python import Solution
+
+class TestBinarySearch(unittest.TestCase):
+    def setUp(self):
+        self.solution = Solution()
+
+    def test_example_case(self):
+        self.assertEqual(self.solution.binary_search([1, 2, 3, 4, 5], 3), 2)
+
+    def test_target_not_found(self):
+        self.assertEqual(self.solution.binary_search([1, 2, 3, 4, 5], 6), -1)
+
+    def test_empty_list(self):
+        self.assertEqual(self.solution.binary_search([], 3), -1)
+
+    def test_single_element_found(self):
+        self.assertEqual(self.solution.binary_search([3], 3), 0)
+
+    def test_single_element_not_found(self):
+        self.assertEqual(self.solution.binary_search([1], 3), -1)
+
+    def test_multiple_occurrences(self):
+        self.assertEqual(self.solution.binary_search([1, 2, 3, 3, 3, 4, 5], 3), 2)
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..e69de29