diff --git a/actions/dependabot.py b/actions/dependabot.py
index 2bfc9f4..8fa9881 100644
--- a/actions/dependabot.py
+++ b/actions/dependabot.py
@@ -389,7 +389,7 @@ def run():
             f"**Repos scanned:** {len(repos)} | **PRs created:** {total_prs_created} | **Skipped:** {total_prs_skipped} | **Actions cached:** {len(cache)}\n",
             *summary,
         ]
-        with open(summary_file, "a") as f:
+        with open(summary_file, "a", encoding="utf-8") as f:
             f.write("\n".join(lines))
 
 
diff --git a/actions/first_interaction.py b/actions/first_interaction.py
index 4f635b5..9b17727 100644
--- a/actions/first_interaction.py
+++ b/actions/first_interaction.py
@@ -217,7 +217,7 @@ def main(*args, **kwargs):
         if AUTO_PR_REVIEW:
             print("Starting automatic PR review...")
             review_number = review_pr.dismiss_previous_reviews(event)
-            review_data = review_pr.generate_pr_review(event.repository, diff, title, summary)
+            review_data = review_pr.generate_pr_review(event.repository, diff, title, summary, event)
             review_pr.post_review_summary(event, review_data, review_number)
             print("PR review completed")
         return
diff --git a/actions/update_markdown_code_blocks.py b/actions/update_markdown_code_blocks.py
index 3f93306..4a89cca 100644
--- a/actions/update_markdown_code_blocks.py
+++ b/actions/update_markdown_code_blocks.py
@@ -125,7 +125,7 @@ def process_markdown_string(
     with tempfile.TemporaryDirectory() as temp_dir_name:
         temp_dir = Path(temp_dir_name)
         temp_md = temp_dir / "input.md"
-        temp_md.write_text(markdown_content)
+        temp_md.write_text(markdown_content, encoding="utf-8")
 
         markdown_snapshot, temp_files = process_markdown_file(temp_md, temp_dir, process_python, process_bash, verbose)
         if markdown_snapshot is None or temp_files is None:
@@ -140,7 +140,7 @@ def process_markdown_string(
             format_bash_with_prettier(temp_dir)
 
         update_markdown_file(temp_md, markdown_snapshot, temp_files)
-        formatted_markdown = temp_md.read_text()
+        formatted_markdown = temp_md.read_text(encoding="utf-8")
 
     return formatted_markdown
 
@@ -159,7 +159,7 @@ def generate_temp_filename(file_path, index, code_type):
 def process_markdown_file(file_path, temp_dir, process_python=True, process_bash=True, verbose=False):
     """Processes a Markdown file, extracting code blocks for formatting and updating the original file."""
     try:
-        markdown_content = Path(file_path).read_text()
+        markdown_content = Path(file_path).read_text(encoding="utf-8")
         code_blocks_by_type = extract_code_blocks(markdown_content)
         temp_files = []
 
@@ -179,7 +179,7 @@ def process_markdown_file(file_path, temp_dir, process_python=True, process_bash
                 code_without_indentation = remove_indentation(code_block, num_spaces)
                 temp_file_path = temp_dir / generate_temp_filename(file_path, i + offset, code_type)
 
-                with open(temp_file_path, "w") as temp_file:
+                with open(temp_file_path, "w", encoding="utf-8") as temp_file:
                     temp_file.write(code_without_indentation)
 
                 temp_files.append((num_spaces, code_block, temp_file_path, code_type))
@@ -195,7 +195,7 @@ def update_markdown_file(file_path, markdown_content, temp_files):
     """Updates a Markdown file with formatted code blocks."""
     for num_spaces, original_code_block, temp_file_path, code_type in temp_files:
         try:
-            with open(temp_file_path) as temp_file:
+            with open(temp_file_path, encoding="utf-8") as temp_file:
                 formatted_code = temp_file.read().rstrip("\n")  # Strip trailing newlines
             formatted_code_with_indentation = add_indentation(formatted_code, num_spaces)
 
@@ -212,7 +212,7 @@ def update_markdown_file(file_path, markdown_content, temp_files):
             print(f"Error updating code block in file {file_path}: {e}")
 
     try:
-        with open(file_path, "w") as file:
+        with open(file_path, "w", encoding="utf-8") as file:
             file.write(markdown_content)
     except Exception as e:
         print(f"Error writing file {file_path}: {e}")
diff --git a/tests/test_file_headers.py b/tests/test_file_headers.py
index b945773..95f80e7 100644
--- a/tests/test_file_headers.py
+++ b/tests/test_file_headers.py
@@ -115,11 +115,12 @@ def test_ignore_paths():
 
 def test_main_real_files():
     """Test main function on actual repository files."""
-    # Mock update_file to prevent actual file modifications during testing
     with patch("actions.update_file_headers.update_file", return_value=False) as mock_update:
-        main()
-        # Verify that update_file was called (indicates file processing occurred)
-        assert mock_update.call_count > 0
+        with patch("actions.update_file_headers.Action") as mock_action:
+            mock_action.return_value.repository = "ultralytics/actions"
+            mock_action.return_value.is_repo_private.return_value = False
+            main()
+            assert mock_update.call_count > 0
 
 
 def test_main_with_custom_header():