diff --git a/README.md b/README.md
index 1b32a07..39a1228 100644
--- a/README.md
+++ b/README.md
@@ -9,12 +9,12 @@ To test varios sample repositories with ease,  it is recommended to setup `BROWS
 
 ### For Windows:
 
- - Download the latest python build for windows - http://sourceforge.net/projects/pywin32/files/pywin32/
+ - Download the latest python build for windows - https://www.python.org/downloads/windows/
  - Run the installer exe and follow the instructions to install python.
 
 ### For Mac and Linux:
 
- - Run python --version to see what python version is installed and make sure it is 2.5.X and above.
+ - Run python --version to see what python version is installed and make sure it is 3.X and above.
  - Mac OS, Ubuntu and many flavors of linux come with pre-installed python.
 
 ## Install Selenium
diff --git a/google-search-browserstack.py b/google-search-browserstack.py
index 6801532..db9abc5 100644
--- a/google-search-browserstack.py
+++ b/google-search-browserstack.py
@@ -31,7 +31,7 @@
     command_executor='https://%s:%s@hub.browserstack.com/wd/hub' % (
         USERNAME, BROWSERSTACK_ACCESS_KEY
     ),
-    desired_capabilities = capabilities
+    desired_capabilities=capabilities
 )
 
 driver.get("http://www.google.com")
@@ -42,5 +42,5 @@
 elem.send_keys("selenium")
 elem.submit()
 
-print driver.title
+print(driver.title)
 driver.quit()
diff --git a/parallel_tests/README.md b/parallel_tests/README.md
index 22ac72b..302bec2 100644
--- a/parallel_tests/README.md
+++ b/parallel_tests/README.md
@@ -10,4 +10,6 @@ This project contains 3 files. Each of the files is described below.
 
 To run the tests in parallel execute the following command:
 
-    python run_parallel_tests.py test.py browsers.json
+```sh
+    python3 run_parallel_tests.py test.py browsers.json
+```
diff --git a/parallel_tests/run_parallel_tests.py b/parallel_tests/run_parallel_tests.py
index 8492d00..36a0616 100644
--- a/parallel_tests/run_parallel_tests.py
+++ b/parallel_tests/run_parallel_tests.py
@@ -1,7 +1,11 @@
 import json, sys, subprocess
 
-file_name = sys.argv[1]
-json_name = sys.argv[2]
+try:
+	file_name = sys.argv[1]
+	json_name = sys.argv[2]
+except IndexError:
+	print("Please provide test script and browserconfig as first and second argument, respectively from command line")
+	sys.exit(1)
 
 with open(json_name, "r") as f:
     obj = json.loads(f.read())
@@ -9,7 +13,7 @@
 num_of_tests = len(obj)
 process = []
 for counter in range(num_of_tests):
-	cmd = "python "+str(file_name)+ " " +str(json_name)+ " " +str(counter)
+	cmd = "python3 %s %s %s" % (file_name, json_name, counter)
 	process.append(subprocess.Popen(cmd, shell=True))
 
 for counter in range(num_of_tests):
diff --git a/parallel_tests/test.py b/parallel_tests/test.py
index 765101a..4d91759 100644
--- a/parallel_tests/test.py
+++ b/parallel_tests/test.py
@@ -3,7 +3,13 @@
 import sys
 import json
 
-json_name = sys.argv[1]
+try:
+    json_name = sys.argv[1]
+    counter_val = sys.argv[2]
+except IndexError:
+    print('Json name and counter val must be passed as first and second argument, respectively, from the comamnd line')
+    sys.exit(1)
+
 USERNAME = os.environ.get('BROWSERSTACK_USERNAME') or sys.argv[2]
 BROWSERSTACK_ACCESS_KEY = os.environ.get(
     'BROWSERSTACK_ACCESS_KEY') or sys.argv[3]
@@ -11,8 +17,8 @@
 with open(json_name, "r") as f:
     obj = json.loads(f.read())
 
-caps = obj[int(sys.argv[2])]
-print "Test "+sys.argv[2]+" started"
+caps = obj[int(counter_val)]
+print("Test %s started" % (counter_val))
 
 #------------------------------------------------------#
 # THE TEST TO BE RUN PARALLELY GOES HERE
@@ -21,7 +27,8 @@
     command_executor='https://%s:%s@hub.browserstack.com/wd/hub' % (
         USERNAME, BROWSERSTACK_ACCESS_KEY
     ),
-    desired_capabilities=caps)
+    desired_capabilities=caps
+)
 
 driver.get("http://www.google.com")
 inputElement = driver.find_element_by_name("q")
diff --git a/screenshot-sample.py b/screenshot-sample.py
index 2cbd1d1..5860214 100644
--- a/screenshot-sample.py
+++ b/screenshot-sample.py
@@ -23,12 +23,13 @@
 try:
     USERNAME = sys.argv[1]
     BROWSERSTACK_ACCESS_KEY = sys.argv[2]
+    FILENAME = sys.argv[3]
 except IndexError:
     print("Pleaes provide the username, browserstack access key and filename with which screenshot should be saved as command line arguments.")
     sys.exit(1)
 
 # Define take_screenshot 
-def take_screenshot(webdriver, file_name = "sample.png"):
+def take_screenshot(webdriver, file_name="sample.png"):
     """
     @param webdriver: WebDriver handler.
     @type webdriver: WebDriver
@@ -37,21 +38,22 @@ def take_screenshot(webdriver, file_name = "sample.png"):
     """
     if isinstance(webdriver, WebDriver):
         base64_data = webdriver.get_screenshot_as_base64()
-        screenshot_data = base64.decodestring(base64_data)
-        screenshot_file = open(file_name, "w")
+        screenshot_data = base64.b64decode(base64_data)
+        screenshot_file = open(file_name, "wb")
         screenshot_file.write(screenshot_data)
         screenshot_file.close()
     else:
         webdriver.save_screenshot(filename)
 
 driver = webdriver.Remote(
-    command_executor = 'http://akshaybhardwaj1:XQWDewaJsUzqYJRv8zhr@hub.browserstack.com/wd/hub',
-    desired_capabilities = caps)
+    command_executor="http://%s:%s@hub.browserstack.com/wd/hub" % (USERNAME, BROWSERSTACK_ACCESS_KEY),
+    desired_capabilities=caps
+)
 
 driver.get("http://www.google.com")
 inputElement = driver.find_element_by_name("q")
 inputElement.send_keys("browserstack")
 inputElement.submit()
-print driver.title
-take_screenshot(driver, './sample.png')
+print(driver.title)
+take_screenshot(driver, FILENAME)
 driver.quit()