diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index ee75438..4975099 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -33,6 +33,7 @@ jobs:
     - name: Set Chrome directory in path
       run: | 
         CHROME_DIR=$(dirname "${{ steps.setup_chrome.outputs.chrome-path }}")
+        echo "CHROME_DIR: $CHROME_DIR"
         echo "$CHROME_DIR" >> $GITHUB_PATH
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v3
diff --git a/examples/get_sp500.mp.py b/examples/get_sp500.mp.py
index 13e46a2..1739e72 100755
--- a/examples/get_sp500.mp.py
+++ b/examples/get_sp500.mp.py
@@ -42,6 +42,7 @@ def process_tickers(tickers, proxy):
         proxy=proxy,
     )
 
+
     logging.info(f"Processing tickers: {tickers}")
     
     results = []
@@ -61,17 +62,18 @@ def process_tickers(tickers, proxy):
 
         results.append((f"Ticker: {ticker}", valuations, financials))
 
+    stock.driver.quit()
     return results
 # End of process_tickers
 
 def initializer():
     """ensure the parent proc's database connections are not touched
     in the new connection pool"""
-    engine.dispose(close=False)
+    engine.dispose(close=False
 
-# Use ProcessPoolExecutor to process tickers in parallel
+# Use ProcessPoolExecutor to process tickers i parallel
 max_workers = 4  # Adjust max_workers as needed
-chunk_size = 50
+chunk_size = 8
 ticker_chunks = [sp500_tickers[i:i + chunk_size] for i in range(0, len(sp500_tickers), chunk_size)]
 
 with ProcessPoolExecutor(max_workers=max_workers, initializer=initializer) as executor:
diff --git a/tests/test_stocks.py b/tests/test_stocks.py
index 043ed49..a70eb18 100755
--- a/tests/test_stocks.py
+++ b/tests/test_stocks.py
@@ -7,9 +7,27 @@
 import logging
 import pandas as pd
 
+from selenium import webdriver
+import undetected_chromedriver as uc
+
+# For Chrome driver
+from webdriver_manager.chrome import ChromeDriverManager
+
+# For Firefox driver
+from webdriver_manager.firefox import GeckoDriverManager
+
 # Configure logging
 logging.basicConfig(level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s')
 
+# It seems that undetected_chromedriver is not working properly, when user_multi_procs is set to True
+# So let user_multi_procs to be False here to initialize the driver environment
+nouse_driver = uc.Chrome(
+    version_main=126,
+    use_subprocess=True,
+    user_multi_procs=False,
+    service=webdriver.ChromeService(ChromeDriverManager(driver_version='126').install()),
+)
+
 def test_stocks():
     logging.info("Starting test_stocks")