Replaced 'raise SkipTest' with self.skipTest() in a few tests.

tests/i18n/test_compilation.py

@@ -156,7 +156,7 @@ class CompilationErrorHandling(MessageCompilationTests):
             else:
                 cmd = MakeMessagesCommand()
                 if cmd.gettext_version < (0, 18, 3):
-                    raise unittest.SkipTest("python-brace-format is a recent gettext addition.")
+                    self.skipTest("python-brace-format is a recent gettext addition.")
                 with self.assertRaisesMessage(CommandError, "' cannot start a field name"):
                     call_command('compilemessages', locale=['ko'], verbosity=0)
 

tests/i18n/test_extraction.py

@@ -7,7 +7,7 @@ import re
 import shutil
 import time
 import warnings
-from unittest import SkipTest, skipUnless
+from unittest import skipUnless
 
 from django.core import management
 from django.core.management import execute_from_command_line
@@ -498,7 +498,7 @@ class SymlinkExtractorTests(ExtractorTests):
                 try:
                     os.symlink(os.path.join(self.test_dir, 'templates'), self.symlinked_dir)
                 except (OSError, NotImplementedError):
-                    raise SkipTest("os.symlink() is available on this OS but can't be used by this user.")
+                    self.skipTest("os.symlink() is available on this OS but can't be used by this user.")
             os.chdir(self.test_dir)
             management.call_command('makemessages', locale=[LOCALE], verbosity=0, symlinks=True)
             self.assertTrue(os.path.exists(self.PO_FILE))
@@ -507,7 +507,7 @@ class SymlinkExtractorTests(ExtractorTests):
                 self.assertMsgId('This literal should be included.', po_contents)
             self.assertLocationCommentPresent(self.PO_FILE, None, 'templates_symlinked', 'test.html')
         else:
-            raise SkipTest("os.symlink() not available on this OS + Python version combination.")
+            self.skipTest("os.symlink() not available on this OS + Python version combination.")
 
 
 class CopyPluralFormsExtractorTests(ExtractorTests):

tests/utils_tests/test_timezone.py

@@ -46,7 +46,7 @@ class TimezoneTests(SimpleTestCase):
         except (OverflowError, ValueError) as exc:
             self.assertIn("install pytz", exc.args[0])
         else:
-            raise unittest.SkipTest("Failed to trigger an OverflowError or ValueError")
+            self.skipTest("Failed to trigger an OverflowError or ValueError")
 
     def test_now(self):
         with override_settings(USE_TZ=True):