🔧 Upgrade pytest version and config (#481)

Author: tiangolo

pyproject.toml

@@ -76,7 +76,7 @@ github-actions = [
 tests = [
     "coverage[toml]>=6.2,<8.0",
     "mypy==1.19.1",
-    "pytest>=7.4.0,<9.0.0",
+    "pytest>=9.0.0",
     "ruff==0.15.2",
 ]
 
@@ -91,6 +91,17 @@ source-includes = [
     "scripts/",
 ]
 
+[tool.pytest]
+minversion = "9.0"
+addopts = [
+  "--strict-config",
+  "--strict-markers",
+]
+strict_xfail = true
+filterwarnings = [
+    "error",
+]
+
 [tool.coverage.run]
 parallel = true
 data_file = "coverage/.coverage"