diff --git a/xtest/pyproject.toml b/xtest/pyproject.toml
index 6b5682dca..98fff393c 100644
--- a/xtest/pyproject.toml
+++ b/xtest/pyproject.toml
@@ -50,8 +50,8 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
+    "pyright>=1.1.408",
     "ruff>=0.9.0",
-    "pyright>=1.1.380",
 ]
 
 # Note: This is a test suite, not a distributable package.
diff --git a/xtest/uv.lock b/xtest/uv.lock
index 40f1b8ee3..614e174c3 100644
--- a/xtest/uv.lock
+++ b/xtest/uv.lock
@@ -657,7 +657,7 @@ requires-dist = [
     { name = "pydantic", specifier = ">=2.12.5" },
     { name = "pydantic-core", specifier = ">=2.41.5" },
     { name = "pygments", specifier = ">=2.19.2" },
-    { name = "pyright", marker = "extra == 'dev'", specifier = ">=1.1.380" },
+    { name = "pyright", marker = "extra == 'dev'", specifier = ">=1.1.408" },
     { name = "pytest", specifier = ">=9.0.2" },
     { name = "pytest-html", specifier = ">=4.1.1" },
     { name = "pytest-metadata", specifier = ">=3.1.1" },