diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index baa8b9c..72dd1e7 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -9,7 +9,7 @@ ci:
 
 repos:
     - repo: https://github.com/astral-sh/ruff-pre-commit
-      rev: v0.14.14
+      rev: v0.15.0
       hooks:
           - id: ruff-check
             args: [--fix]
diff --git a/flake8_async/base.py b/flake8_async/base.py
index d0127b1..43f31a3 100644
--- a/flake8_async/base.py
+++ b/flake8_async/base.py
@@ -13,7 +13,7 @@
 # several different ones are used for the same code. Used in e.g. Visitor103
 def strip_error_subidentifier(s: str) -> str:
     """Turn e.g. ASYNC103_anyio_trio => ASYNC103."""
-    return s.split("_")[0]
+    return s.split("_", maxsplit=1)[0]
 
 
 def error_has_subidentifier(s: str) -> bool:
diff --git a/flake8_async/visitors/flake8asyncvisitor.py b/flake8_async/visitors/flake8asyncvisitor.py
index 8e4297a..7774281 100644
--- a/flake8_async/visitors/flake8asyncvisitor.py
+++ b/flake8_async/visitors/flake8asyncvisitor.py
@@ -144,7 +144,7 @@ def walk(self, *body: ast.AST) -> Iterable[ast.AST]:
 
     @property
     def library(self) -> tuple[str, ...]:
-        return self.__state.library if self.__state.library else ("trio",)
+        return self.__state.library or ("trio",)
 
     @property
     def library_str(self) -> str:
@@ -253,7 +253,7 @@ def should_autofix(self, node: cst.CSTNode, code: str | None = None) -> bool:
 
     @property
     def library(self) -> tuple[str, ...]:
-        return self.__state.library if self.__state.library else ("trio",)
+        return self.__state.library or ("trio",)
 
     # library_str not used in cst yet
 
diff --git a/flake8_async/visitors/visitor91x.py b/flake8_async/visitors/visitor91x.py
index 474bfe0..1ce0dbd 100644
--- a/flake8_async/visitors/visitor91x.py
+++ b/flake8_async/visitors/visitor91x.py
@@ -344,7 +344,7 @@ def __init__(
 
     @property
     def library(self) -> tuple[str, ...]:
-        return self.__library if self.__library else ("trio",)
+        return self.__library or ("trio",)
 
     def should_autofix(self, node: cst.CSTNode, code: str | None = None) -> bool:
         return not self.noautofix
diff --git a/tests/test_flake8_async.py b/tests/test_flake8_async.py
index 339fbdb..dbd36ee 100644
--- a/tests/test_flake8_async.py
+++ b/tests/test_flake8_async.py
@@ -395,7 +395,7 @@ def _parse_eval_file(
 ) -> tuple[list[Error], list[str], str]:
     # version check
     check_version(test)
-    test = test.split("_")[0]
+    test = test.split("_", maxsplit=1)[0]
 
     parsed_args = []