diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
new file mode 100644
index 00000000..8b2dd985
--- /dev/null
+++ b/.github/workflows/pytest.yml
@@ -0,0 +1,26 @@
+name: Python PyTest Workflow
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Python 3.12
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.12
+
+    - name: Install pytest
+      run: |
+        pip install pytest
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+
+    - name: Set PYTHONPATH
+      run: echo "PYTHONPATH=$GITHUB_WORKSPACE" >> $GITHUB_ENV
+
+    - name: Run pytest
+      run: pytest
diff --git a/requirements.txt b/requirements.txt
index d2fc8f8b..78973e28 100644
Binary files a/requirements.txt and b/requirements.txt differ
diff --git a/services/openai/agent.py b/services/openai/agent.py
index d996ba9d..eae4cbc7 100644
--- a/services/openai/agent.py
+++ b/services/openai/agent.py
@@ -15,7 +15,7 @@
 from services.openai.functions import GET_REMOTE_FILE_CONTENT, functions
 from services.openai.init import create_openai_client
 from services.openai.instructions import SYSTEM_INSTRUCTION_FOR_AGENT
-from utils.file_manager import clean_specific_lines, split_diffs
+from utils.file_manager import clean_specific_lines, correct_hunk_headers, split_diffs
 
 
 def create_assistant() -> Assistant:
@@ -100,9 +100,12 @@ def run_assistant(
     # Clean the diff text and split it
     diff: str = clean_specific_lines(text=value)
     text_diffs: list[str] = split_diffs(diff_text=diff)
+    output: list[str] = []
     for diff in text_diffs:
+        diff = correct_hunk_headers(diff_text=diff)
         print(f"Diff: {repr(diff)}\n")
-    return text_diffs
+        output.append(diff)
+    return output
 
 
 def submit_message(thread: Thread, user_message: str) -> Run:
diff --git a/tests/utils/test_file_manager.py b/tests/utils/test_file_manager.py
new file mode 100644
index 00000000..48cd53c1
--- /dev/null
+++ b/tests/utils/test_file_manager.py
@@ -0,0 +1,35 @@
+from utils.file_manager import correct_hunk_headers
+
+
+def test_correct_hunk_headers_1() -> None:
+    """Test the case where line counts are wrong"""
+    diff_text = """--- a/example.txt
++++ b/example.txt
+@@ -1,3 +1,3 @@
+- old line 1
++ new line 1
+- old line 2
++ new line 2"""
+    expected_result = """--- a/example.txt
++++ b/example.txt
+@@ -1,2 +1,2 @@
+- old line 1
++ new line 1
+- old line 2
++ new line 2"""
+    assert correct_hunk_headers(diff_text=diff_text) == expected_result
+
+
+def test_correct_hunk_headers_2() -> None:
+    """Test the case where the hunk header does not have a line count"""
+    diff_text = """--- a/example2.txt
++++ b/example2.txt
+@@ -1 +1 @@
+- old line 1
++ new line 1"""
+    expected_result = """--- a/example2.txt
++++ b/example2.txt
+@@ -1,1 +1,1 @@
+- old line 1
++ new line 1"""
+    assert correct_hunk_headers(diff_text=diff_text) == expected_result
diff --git a/utils/file_manager.py b/utils/file_manager.py
index cb49359d..781e9af5 100644
--- a/utils/file_manager.py
+++ b/utils/file_manager.py
@@ -1,8 +1,8 @@
+import logging
 import os
 import re
 import subprocess
 import tempfile
-import logging
 
 
 def apply_patch(original_text: str, diff_text: str) -> str:
@@ -51,12 +51,12 @@ def apply_patch(original_text: str, diff_text: str) -> str:
         print("Failed to apply patch.")
         print(f"stdout: {e.stdout}")
         print(f"stderr: {e.stderr}\n")
-        logging.error(f"apply_patch stderr: {e.stderr}")
+        logging.error(msg=f"apply_patch stderr: {e.stderr}")  # pylint: disable=no-member
         print(f"Command: {' '.join(e.cmd)}")
         print(f"Exit status: {e.returncode}")
         return ""
-    except Exception as e:
-        logging.error(f"Error: {e}")
+    except Exception as e:  # pylint: disable=broad-except
+        logging.error(msg=f"Error: {e}")  # pylint: disable=no-member
         return ""
     finally:
         os.remove(path=original_file_name)
@@ -76,6 +76,53 @@ def clean_specific_lines(text: str) -> str:
     ).strip()
 
 
+def correct_hunk_headers(diff_text: str) -> str:
+    """
+    Match following patterns:
+    1: @@ -start1 +start2 @@
+    2: @@ -start1,lines1 +start2 @@
+    3: @@ -start1 +start2,lines2 @@
+    4: @@ -start1,lines1 +start2,lines2 @@
+    """
+    # Split the diff into lines
+    lines: list[str] = diff_text.splitlines()
+    updated_lines: list[str] = []
+    hunk_pattern: re.Pattern[str] = re.compile(
+        pattern=r'^@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@')
+
+    i = 0
+    while i < len(lines):
+        line: str = lines[i]
+        match: re.Match[str] | None = hunk_pattern.match(string=line)
+
+        # Add the line to the updated diff if it's not a hunk header
+        if not match:
+            updated_lines.append(line)
+            i += 1
+            continue
+
+        # Correct the hunk header if match is not None
+        l1, _s1, l2, _s2 = (int(x) if x is not None else 0 for x in match.groups())
+        s1_actual, s2_actual = 0, 0
+        i += 1
+
+        # Count actual number of lines changed
+        start_index: int = i
+        while i < len(lines) and not lines[i].startswith('@@'):
+            if lines[i].startswith('+'):
+                s2_actual += 1
+            if lines[i].startswith('-'):
+                s1_actual += 1
+            i += 1
+
+        # Update the hunk header with actual numbers
+        updated_hunk_header: str = f'@@ -{l1},{s1_actual} +{l2},{s2_actual} @@'
+        updated_lines.append(updated_hunk_header)
+        updated_lines.extend(lines[start_index:i])
+
+    return '\n'.join(updated_lines)
+
+
 def extract_file_name(diff_text: str) -> str:
     match = re.search(pattern=r"^\+\+\+ (.+)$", string=diff_text, flags=re.MULTILINE)
     if match: