diff --git a/pyproject.toml b/pyproject.toml
index c10eafcdd..4c3d92430 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -96,7 +96,7 @@ hooks = [
 # Note that the `custom_exit_code` and `env` plugins may currently be unmaintained.
 test = [
     "hypothesis >=6.100.1,<7.0.0",
-    "pytest >=8.2.2,<9.0.0",
+    "pytest >=8.2.2,<10.0.0",
     "pytest-custom_exit_code >=0.3.0,<1.0.0",
     "pytest-cov >=6.0.0,<7.0.0",
     "pytest-env >=1.0.0,<2.0.0",