diff --git a/src/__init__.py b/src/__init__.py
index 5efb0f368..97890ed45 100644
--- a/src/__init__.py
+++ b/src/__init__.py
@@ -464,12 +464,7 @@ def _format_g(value, *, fmt='%g'):
         
 format_g = _format_g
 
-# ByteString is gone from typing in 3.14.
-# collections.abc.Buffer available from 3.12 only
-try:
-    ByteString = typing.ByteString
-except AttributeError:
-    ByteString = bytes | bytearray | memoryview
+ByteString = bytes | bytearray | memoryview
 
 # Names required by class method typing annotations.
 OptBytes = typing.Optional[ByteString]
diff --git a/src/utils.py b/src/utils.py
index 7d3271ea8..6afdb45e0 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -24,13 +24,7 @@
 matrix_like = "matrix_like"
 quad_like = "quad_like"
 
-# ByteString is gone from typing in 3.14.
-# collections.abc.Buffer available from 3.12 only
-try:
-    ByteString = typing.ByteString
-except AttributeError:
-    # pylint: disable=unsupported-binary-operation
-    ByteString = bytes | bytearray | memoryview
+ByteString = bytes | bytearray | memoryview
 
 AnyType = typing.Any
 OptInt = typing.Union[int, None]
diff --git a/tests/test_general.py b/tests/test_general.py
index 11af8f598..9dc2f25d6 100644
--- a/tests/test_general.py
+++ b/tests/test_general.py
@@ -2023,6 +2023,16 @@ def test_4392():
     print(f'{pymupdf.swig_version=}', flush=1)
     print(f'{pymupdf.swig_version_tuple=}', flush=1)
     
+    # pytest exit codes
+    # (https://docs.pytest.org/en/latest/reference/exit-codes.html):
+    #
+    # Exit code 0: All tests were collected and passed successfully
+    # Exit code 1: Tests were collected and run but some of the tests failed
+    # Exit code 2: Test execution was interrupted by the user
+    # Exit code 3: Internal error happened while executing tests
+    # Exit code 4: pytest command line usage error
+    # Exit code 5: No tests were collected
+    
     assert e1 == 5
     if pymupdf.swig_version_tuple >= (4, 4):
         if sysconfig.get_config_var('Py_GIL_DISABLED') == 1 and sys._is_gil_enabled():