old_contents: import unittest
  from prime_numbers import primenumbers
  
  class Test_prime_numbers(unittest.Testcase):
  	def test_returns_correct_primes(self):
  		self.assertTrue(primenumbers(20), [1,3,5,7,11,13,17,19])
  
  	def test_assert_input_is_not_string(self):
  		self.assertRaises(TypeError, primenumbers('a_string'))
  
  	def test_asserts_input_not_negative(self):
  		self.assertIs(primenumbers(-5), 'Please don\'t input negatives')		
  
new_contents: import unittest
  from prime_numbers import primenumbers
  
  class Test_prime_numbers(unittest.Testcase):
  	def test_returns_correct_primes(self):
  		self.assertTrue(primenumbers(20), [1,3,5,7,11,13,17,19])
  
  	def test_assert_input_is_not_string(self):
  		self.assertRaises(TypeError, primenumbers('a_string'))
  
  	def test_asserts_input_not_negative(self):
  		self.assertIs(primenumbers(-5), 'Please don\'t input negatives')
  
  	def test_returns_primes_in_array(self):
  		# Result should be an array
  		self.assertIsInstance(primenumbers(16), List)			
  
subject: modify prime_number_test.py file to return list only