diff --git a/README.md b/README.md
index 546cd5e..04cb235 100644
--- a/README.md
+++ b/README.md
@@ -12,12 +12,12 @@ To test various 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 8dc6d5f..ecc0d08 100644
--- a/google-search-browserstack.py
+++ b/google-search-browserstack.py
@@ -27,5 +27,5 @@
 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 04260ba..449656d 100644
--- a/parallel_tests/README.md
+++ b/parallel_tests/README.md
@@ -25,4 +25,6 @@ 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/browsers.json b/parallel_tests/browsers.json
index d501620..4e0e1b5 100644
--- a/parallel_tests/browsers.json
+++ b/parallel_tests/browsers.json
@@ -1,37 +1,37 @@
 [
   {
-    "browserName": "iPhone",
-    "platform": "MAC",
-    "device": "iPhone 5"
+    "os_version": "11",
+    "device": "iPhone 8",
+    "real_mobile": "true"
   },
   {
-    "browser": "firefox",
-    "browser_version": "17.0",
     "os": "Windows",
-    "os_version": "8"
+    "os_version": "8",
+    "browserName": "Firefox",
+    "browser_version": "65.0"
   },
   {
-    "browser": "ie",
-    "browser_version": "8.0",
     "os": "Windows",
-    "os_version": "7"
+    "os_version": "7",
+    "browserName": "IE",
+    "browser_version": "8.0"
   },
   {
-    "browser": "ie",
-    "browser_version": "9.0",
     "os": "Windows",
-    "os_version": "7"
+    "os_version": "7",
+    "browserName": "IE",
+    "browser_version": "9.0"
   },
   {
-    "browser": "ie",
-    "browser_version": "10.0",
     "os": "Windows",
-    "os_version": "8"
+    "os_version": "8",
+    "browserName": "IE",
+    "browser_version": "10.0"
   },
   {
-    "browser": "firefox",
-    "browser_version": "15.0",
     "os": "OS X",
-    "os_version": "Snow Leopard"
+    "os_version": "Snow Leopard",
+    "browserName": "Firefox",
+    "browser_version": "42.0"
   }
 ]
diff --git a/parallel_tests/run_parallel_tests.py b/parallel_tests/run_parallel_tests.py
index 8492d00..a617042 100644
--- a/parallel_tests/run_parallel_tests.py
+++ b/parallel_tests/run_parallel_tests.py
@@ -1,7 +1,13 @@
-import json, sys, subprocess
+import json
+import sys
+import 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 +15,7 @@
 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 878b846..6023cf0 100644
--- a/parallel_tests/test.py
+++ b/parallel_tests/test.py
@@ -1,15 +1,21 @@
 from selenium import webdriver
 import os, sys, 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]
 
 with open(json_name, "r") as f:
     obj = json.loads(f.read())
 
-instance_caps= obj[int(sys.argv[2])]
-print "Test "+sys.argv[2]+" started"
+instance_caps = obj[int(counter_val)]
+print("Test %s started" % (counter_val))
 
 #------------------------------------------------------#
 # Mention any other capabilities required in the test
@@ -19,7 +25,7 @@
 
 #------------------------------------------------------#
 
-caps = dict(caps.items() + instance_caps.items())
+caps = {**caps, **instance_caps}
 
 #------------------------------------------------------#
 # THE TEST TO BE RUN PARALLELY GOES HERE
@@ -28,12 +34,13 @@
     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")
 inputElement.send_keys("browserstack")
 inputElement.submit()
-print driver.title
+print(driver.title)
 driver.quit()
 #------------------------------------------------------#
diff --git a/screenshot-sample.py b/screenshot-sample.py
index 2cbd1d1..2dbe04b 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()