diff --git a/science/py-ncrystal/Makefile b/science/py-ncrystal/Makefile
index 43f070aff5f9..bcf0c0b51f5e 100644
--- a/science/py-ncrystal/Makefile
+++ b/science/py-ncrystal/Makefile
@@ -1,37 +1,40 @@
 PORTNAME=	ncrystal
 DISTVERSIONPREFIX=	v
 DISTVERSION=	4.1.2
+PORTREVISION=	1
 CATEGORIES=	science # physics
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Library for thermal neutron transport in crystals and other materials
 WWW=		https://mctools.github.io/ncrystal/
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${PY_SETUPTOOLS} \
 		${PYNUMPY} \
 		${PYTHON_PKGNAMEPREFIX}scikit-build-core>0:devel/py-scikit-build-core@${PY_FLAVOR} \
 		cmake:devel/cmake-core
 RUN_DEPENDS=	${PYNUMPY}
 
 USES=		python
-USE_PYTHON=	pep517 autoplist
+USE_PYTHON=	pep517 concurrent autoplist
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	mctools
 
-POST_PLIST=	fix-plist
+TEST_ENV=	${MAKE_ENV} \
+		PYTHONPATH=${STAGEDIR}${PYTHONPREFIX_SITELIBDIR} \
+		PATH=${STAGEDIR}${PREFIX}/bin:${PATH}
+#TEST_WRKSRC=	${WRKSRC}/ncrystal_python
 
 post-install:
-	# delete scripts (they are installed by science/ncrystal)
-	@${RM} ${STAGEDIR}${PREFIX}/bin/*
 	# strip binary
 	#@${STRIP_CMD} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/NCrystal/ncrystal_pyinst_data/lib/libNCrystal.so
 
-fix-plist: # see post-install
-	@${REINPLACE_CMD} -e "s|^bin/.*$$||" ${TMPPLIST}
+do-test: # the third test fails for an unknown reason
+	@cd ${TEST_WRKSRC} && \
+		${SETENV} ${TEST_ENV} ${PYTHON_CMD} -m NCrystal.test all
 
 .include <bsd.port.mk>