diff --git a/math/py-Diofant/Makefile b/math/py-Diofant/Makefile
index 53782feb9876..e080f5fd787b 100644
--- a/math/py-Diofant/Makefile
+++ b/math/py-Diofant/Makefile
@@ -11,6 +11,9 @@ WWW=		https://github.com/diofant/diofant
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE.rst
 
+DEPRECATED=	Depends on expired devel/py-pytest-runner
+EXPIRATION_DATE=2025-03-31
+
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}isort>0:devel/py-isort@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pip>0:devel/py-pip@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pytest-runner>0:devel/py-pytest-runner@${PY_FLAVOR} \