old_contents: from django.test import TestCase
  
  from skrill.models import StatusReport
  from skrill.tests.factories import StatusReportFactory, generate_md5_signature
  
  
  class StatusReportTestCase(TestCase):
      def test_valid_md5_signature(self):
          status_report = StatusReportFactory()
          status_report.md5sig = generate_md5_signature(status_report)
          status_report.validate_md5sig()
  
      def test_invalid_md5_signature(self):
          status_report = StatusReportFactory()
          status_report.md5sig = "foobar"
          try:
              status_report.validate_md5sig()
          except StatusReport.InvalidMD5Signature, e:
              str(e)
          else:
              raise Exception("test_invalid_md5_signature failed")
  
  
new_contents: from django.test import TestCase
  
  from skrill.models import StatusReport
  from skrill.tests.factories import StatusReportFactory, generate_md5_signature
  
  
  class StatusReportTestCase(TestCase):
      def test_valid_md5_signature(self):
          status_report = StatusReportFactory()
          status_report.md5sig = generate_md5_signature(status_report)
          status_report.validate_md5sig()
  
      def test_invalid_md5_signature(self):
          status_report = StatusReportFactory()
          status_report.md5sig = "foobar"
          try:
              status_report.validate_md5sig()
          except StatusReport.InvalidMD5Signature, e:
              str(e)
          else:
              raise Exception("test_invalid_md5_signature failed")
  
subject: remove newline