diff --git a/pre_commit_hooks/tests_should_end_in_test.py b/pre_commit_hooks/tests_should_end_in_test.py
index 326e273..c32610c 100644
--- a/pre_commit_hooks/tests_should_end_in_test.py
+++ b/pre_commit_hooks/tests_should_end_in_test.py
@@ -1,11 +1,8 @@
 from __future__ import annotations
-
 import argparse
 import os.path
 import re
 from collections.abc import Sequence
-
-
 def main(argv: Sequence[str] | None = None) -> int:
     parser = argparse.ArgumentParser()
     parser.add_argument('filenames', nargs='*')
@@ -14,27 +11,23 @@ def main(argv: Sequence[str] | None = None) -> int:
         '--pytest',
         dest='pattern',
         action='store_const',
-        const=r'^tests\/(?:[a-zA-Z0-9_]+\/)*tests[a-zA-Z0-9_]*\.py$',
-        default=r'^tests\/(?:[a-zA-Z0-9_]+\/)*tests[a-zA-Z0-9_]*\.py$',
+        const=r'^tests\/(?:[a-zA-Z0-9_]+\/)*tests_[a-zA-Z0-9_]*\.py$',
+        default=r'^tests\/(?:[a-zA-Z0-9_]+\/)*tests_[a-zA-Z0-9_]*\.py$',
         help='(the default) ensure tests match %(const)s',
     )
     args = parser.parse_args(argv)
-
     retcode = 0
     reg = re.compile(args.pattern)
     for filename in args.filenames:
         base = os.path.basename(filename)
         print(base)
-        if (
-                not reg.fullmatch(base) and
-                not base == '.*/__init__.py' and
-                not base == '.*/conftest.py' and
-                not base == '.*/models.py'
-
-        ):
+        # Check for files that should be ignored
+        if base in ('__init__.py', 'conftest.py', 'models.py'):
+            continue
+        # Raise an exception if filename doesn't start with 'tests_' and doesn't match the pattern
+        if not reg.fullmatch(filename):
             retcode = 1
             print(f'{filename} does not match pattern "{args.pattern}"')
-
     return retcode