diff --git a/requirements-test.txt b/requirements-test.txt
index 8d05b9d..d2d210e 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,5 +1,5 @@
 # Test/lint dependencies for local dev and CI.
-pytest>=8,<10
+pytest>=9.1.1,<10
 pypdf>=6.16.2,<7
 ruff>=0.16.6,<1
 # OpenAPI contract validation for wm-serve (CI validates /openapi.json).