old_contents: import os
  import sys
  
  is_windows = sys.platform.startswith('win')
  
  if is_windows:
      print("Running on Windows ...")
  else:
      print("Running on Linux ...")
  
  cwd = os.getcwd()
  os.chdir(cwd + '/tests')
  
  cmd = 'python test_fitting.py'
  os.system(cmd)
  cmd = 'python test_tools.py'
  os.system(cmd)
  cmd = 'python testOseen.py'
  os.system(cmd)
  
  os.chdir(cwd + '/vortexfitting')
  
  cmd = 'python convertToASCII.py -i ../data/example_data_HIT.nc -o ../data/test_dataHIT_ascii.dat'
  os.system(cmd)
  cmd = 'python convertToNC.py -i ../data/test_dataHIT_ascii.dat -o ../data/test_dataHIT_back_converted.nc'
  os.system(cmd)
  cmd = 'python generateNetCDF.py'
  os.system(cmd)
  
new_contents: import os
  import sys
  
  is_windows = sys.platform.startswith('win')
  
  if is_windows:
      print("Running on Windows ...")
  else:
      print("Running on Linux ...")
  
  if sys.version_info[0] < 3:
      raise Exception("Must be using Python 3")
  else:        
  	cwd = os.getcwd()
  	os.chdir(cwd + '/tests')    
      cwd = os.getcwd()
      os.chdir(cwd + '/tests')
  
      cmd = 'python3 test_fitting.py'
      os.system(cmd)
      cmd = 'python3 test_tools.py'
      os.system(cmd)
      cmd = 'python3 testOseen.py'
      os.system(cmd)
  
      os.chdir(cwd + '/vortexfitting')
  
      cmd = 'python3 convertToASCII.py -i ../data/example_data_HIT.nc -o ../data/test_dataHIT_ascii.dat'
      os.system(cmd)
      cmd = 'python3 convertToNC.py -i ../data/test_dataHIT_ascii.dat -o ../data/test_dataHIT_back_converted.nc'
      os.system(cmd)
      cmd = 'python3 generateNetCDF.py'
      os.system(cmd)
  
subject: Update makeTests.py