old_contents: import os
  
  from django.forms import Form
  from django.test import TestCase
  
  from snowpenguin.django.recaptcha2.fields import ReCaptchaField
  from snowpenguin.django.recaptcha2.widgets import ReCaptchaWidget
  
  
  class RecaptchaTestForm(Form):
      recaptcha = ReCaptchaField(widget=ReCaptchaWidget())
  
  
  class TestRecaptchaForm(TestCase):
      def setUp(self):
          os.environ['RECAPTCHA_DISABLE'] = 'True'
  
      def test_dummy_validation(self):
          form = RecaptchaTestForm({})
          self.assertTrue(form.is_valid())
  
      def test_dummy_error(self):
          del os.environ['RECAPTCHA_DISABLE']
          form = RecaptchaTestForm({})
          self.assertFalse(form.is_valid())
  
      def tearDown(self):
          del os.environ['RECAPTCHA_DISABLE']
  
new_contents: import os
  
  from django.forms import Form
  from django.test import TestCase
  
  from snowpenguin.django.recaptcha2.fields import ReCaptchaField
  from snowpenguin.django.recaptcha2.widgets import ReCaptchaWidget
  
  
  class RecaptchaTestForm(Form):
      recaptcha = ReCaptchaField(widget=ReCaptchaWidget())
  
  
  class TestRecaptchaForm(TestCase):
      def setUp(self):
          os.environ['RECAPTCHA_DISABLE'] = 'True'
  
      def test_dummy_validation(self):
          form = RecaptchaTestForm({})
          self.assertTrue(form.is_valid())
  
      def test_dummy_error(self):
          del os.environ['RECAPTCHA_DISABLE']
          form = RecaptchaTestForm({})
          self.assertFalse(form.is_valid())
  
      def tearDown(self):
          if 'RECAPTCHA_DISABLE' in os.environ.keys():
              del os.environ['RECAPTCHA_DISABLE']
  
subject: Fix test error