diff --git a/src/sliding_window/longest_subarray_of_1s_after_deleting_one_element/__init__.py b/src/sliding_window/longest_subarray_of_1s_after_deleting_one_element/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/sliding_window/longest_subarray_of_1s_after_deleting_one_element/solution.py b/src/sliding_window/longest_subarray_of_1s_after_deleting_one_element/solution.py
new file mode 100644
index 0000000..b60c81f
--- /dev/null
+++ b/src/sliding_window/longest_subarray_of_1s_after_deleting_one_element/solution.py
@@ -0,0 +1,16 @@
+from typing import List
+
+
+class Solution:
+    def longestSubarray(self, nums: List[int]) -> int:
+        left, max_length, zeros_counter = 0, 0, 0
+
+        for index in range(len(nums)):
+            if nums[index] == 0:
+                zeros_counter += 1
+            while zeros_counter > 1:
+                if nums[left] == 0:
+                    zeros_counter -= 1
+                left += 1
+            max_length = max(max_length, index - left)
+        return max_length
diff --git a/tests/test_longest_subarray_of_1s_after_deleting_one_element.py b/tests/test_longest_subarray_of_1s_after_deleting_one_element.py
new file mode 100644
index 0000000..370cd72
--- /dev/null
+++ b/tests/test_longest_subarray_of_1s_after_deleting_one_element.py
@@ -0,0 +1,17 @@
+import pytest
+from src.sliding_window.longest_subarray_of_1s_after_deleting_one_element.solution import (
+    Solution,
+)
+
+
+@pytest.mark.parametrize(
+    "nums, expected",
+    [
+        ([1, 1, 0, 1], 3),
+        ([0, 1, 1, 1, 0, 1, 1, 0, 1], 5),
+        ([1, 1, 1], 2),
+    ],
+)
+def test_longest_subarray(nums, expected):
+    solution = Solution()
+    assert solution.longestSubarray(nums) == expected