correct fix

anndata/tests/helpers.py

@@ -651,8 +651,7 @@ def check_error_or_notes_match(e: pytest.ExceptionInfo, pattern: str | re.Patter
     import traceback
 
     message = "".join(traceback.format_exception_only(e.type, e.value))
-    # To match pytest semantics, this must be `match`, not `search`.
-    assert re.match(
+    assert re.search(
         pattern, message
     ), f"Could not find pattern: '{pattern}' in error:\n\n{message}\n"
 

anndata/tests/test_io_utils.py

@@ -39,10 +39,10 @@ def read_attr(_):
         group["X"] = [1, 2, 3]
         group.create_group("group")
 
-        with pytest_8_raises(NotImplementedError, match=r"/X"):
+        with pytest_8_raises(NotImplementedError, match=r".*/X$"):
             read_attr(group["X"])
 
-        with pytest_8_raises(NotImplementedError, match=r"/group"):
+        with pytest_8_raises(NotImplementedError, match=r".*/group$"):
             read_attr(group["group"])
 
 
@@ -91,7 +91,7 @@ class Foo:
     # (?!...) is a negative lookahead
     # (?s) enables the dot to match newlines
     # https://stackoverflow.com/a/406408/130164 <- copilot suggested lol
-    pattern = r"(?s)((?!Error raised while writing key '/?a').)*$"
+    pattern = r"(?s)^((?!Error raised while writing key '/?a').)*$"
 
     with pytest_8_raises(IORegistryError, match=pattern):
         write_elem(group, "/", {"a": {"b": Foo()}})