diff --git a/repo_to_text/main.py b/repo_to_text/main.py
index 6858e7c..bbf7e60 100644
--- a/repo_to_text/main.py
+++ b/repo_to_text/main.py
@@ -81,7 +81,7 @@ def remove_empty_dirs(tree_output: str, path='.') -> str:
     logging.debug('Empty directory removal complete')
     return '\n'.join(final_lines)
 
-def save_repo_to_text(path='.') -> str:
+def save_repo_to_text(path='.', output_dir=None) -> str:
     logging.debug(f'Starting to save repo structure to text for path: {path}')
     gitignore_spec = load_gitignore(path)
     tree_structure = get_tree_structure(path, gitignore_spec)
@@ -91,6 +91,12 @@ def save_repo_to_text(path='.') -> str:
     timestamp = datetime.utcnow().strftime('%Y-%m-%d-%H-%M-%S-UTC')
     output_file = f'repo_snapshot_{timestamp}.txt'
     
+    # Determine the full path to the output file
+    if output_dir:
+        if not os.path.exists(output_dir):
+            os.makedirs(output_dir)
+        output_file = os.path.join(output_dir, output_file)
+    
     with open(output_file, 'w') as file:
         project_name = os.path.basename(os.path.abspath(path))
         file.write(f'Directory: {project_name}\n\n')
@@ -140,11 +146,12 @@ def save_repo_to_text(path='.') -> str:
 def main():
     parser = argparse.ArgumentParser(description='Convert repository structure and contents to text')
     parser.add_argument('--debug', action='store_true', help='Enable debug logging')
+    parser.add_argument('--output-dir', type=str, help='Directory to save the output file')
     args = parser.parse_args()
 
     setup_logging(debug=args.debug)
     logging.debug('repo-to-text script started')
-    save_repo_to_text()
+    save_repo_to_text(output_dir=args.output_dir)
     logging.debug('repo-to-text script finished')
 
 if __name__ == '__main__':
diff --git a/tests/test_main.py b/tests/test_main.py
index e69de29..b3f8274 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -0,0 +1,31 @@
+import os
+import subprocess
+import pytest
+import time
+
+def test_repo_to_text():
+    # Remove any existing snapshot files to avoid conflicts
+    for file in os.listdir('.'):
+        if file.startswith('repo_snapshot_') and file.endswith('.txt'):
+            os.remove(file)
+    
+    # Run the repo-to-text command
+    result = subprocess.run(['repo-to-text'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    
+    # Assert that the command ran without errors
+    assert result.returncode == 0, f"Command failed with error: {result.stderr.decode('utf-8')}"
+    
+    # Check for the existence of the new snapshot file
+    snapshot_files = [f for f in os.listdir('.') if f.startswith('repo_snapshot_') and f.endswith('.txt')]
+    assert len(snapshot_files) == 1, "No snapshot file created or multiple files created"
+    
+    # Verify that the snapshot file is not empty
+    with open(snapshot_files[0], 'r') as f:
+        content = f.read()
+    assert len(content) > 0, "Snapshot file is empty"
+    
+    # Clean up the generated snapshot file
+    os.remove(snapshot_files[0])
+
+if __name__ == "__main__":
+    pytest.main()