diff --git a/science/py-gsd/Makefile b/science/py-gsd/Makefile
index 895b8b903830..a26a3c8b2b33 100644
--- a/science/py-gsd/Makefile
+++ b/science/py-gsd/Makefile
@@ -1,22 +1,26 @@
 PORTNAME=	gsd
 DISTVERSION=	2.6.0
 CATEGORIES=	science python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	GSD (General Simulation Data) file format for Python
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${PYNUMPY}
 RUN_DEPENDS=	${PYNUMPY}
 
 USES=		python:3.6+
-USE_PYTHON=	distutils cython autoplist pytest # tests fail, see https://github.com/glotzerlab/gsd/issues/180
+USE_PYTHON=	distutils cython autoplist pytest
+
+TEST_WRKSRC=	${WRKSRC}/gsd/test
+#TEST_ARGS=	--pyargs gsd -p gsd.pytest_plugin_validate --validate # enable this line to run longer tests, see https://gsd.readthedocs.io/en/v2.6.0/installation.html#run-tests
+TEST_ENV=	${MAKE_ENV} PYTHONPATH=${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/gsd/fl*.so
 
 .include <bsd.port.mk>