Apply suggestions from code review

Co-authored-by: Ran Benita <[email protected]>

Author: kingbuzzman

pytest_django/runner.py

@@ -2,26 +2,36 @@
 from typing import Any, Iterable
 
 
-class PytestTestRunner:
-    """Runs pytest to discover and run tests."""
+class TestRunner:
+    """A Django test runner which uses pytest to discover and run tests when using `manage.py test`."""
 
     def __init__(
-        self, verbosity: int = 1, failfast: bool = False, keepdb: bool = False, **kwargs: Any
+        self,
+        *,
+        verbosity: int = 1,
+        failfast: bool = False,
+        keepdb: bool = False,
+        **kwargs: Any,
     ) -> None:
         self.verbosity = verbosity
         self.failfast = failfast
         self.keepdb = keepdb
 
     @classmethod
     def add_arguments(cls, parser: ArgumentParser) -> None:
+        parser.add_argument(
+            "--failfast",
+            action="store_true",
+            help="Stops the test suite after the first failure.",
+        )
         parser.add_argument(
             "--keepdb", action="store_true", help="Preserves the test DB between runs."
         )
 
     def run_tests(self, test_labels: Iterable[str], **kwargs: Any) -> int:
         """Run pytest and return the exitcode.
 
-        It translates some of Django"s test command option to pytest"s.
+        It translates some of Django's test command option to pytest's.
         """
         import pytest