diff --git a/lang/opensycl/Makefile b/lang/opensycl/Makefile
index f68a91ffe53a..124d3c35726a 100644
--- a/lang/opensycl/Makefile
+++ b/lang/opensycl/Makefile
@@ -1,24 +1,38 @@
 PORTNAME=	opensycl
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.9.4
 CATEGORIES=	lang
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Multi-backend implementation of SYCL for CPUs and GPUs
 WWW=		https://github.com/OpenSYCL/OpenSYCL
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	boost-libs>0:devel/boost-libs
 
 USES=		cmake compiler:c++11-lang llvm:15 python shebangfix
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	OpenSYCL
 GH_PROJECT=	OpenSYCL
 
 SHEBANG_FILES=	bin/syclcc-clang cmake/syclcc-launcher
 
+do-test: # many tests fail, see https://github.com/OpenSYCL/OpenSYCL/issues/996
+	@cd ${WRKSRC}/tests && \
+		mkdir -p build && \
+		cd build && \
+			${SETENV} ${CONFIGURE_ENV} ${CMAKE_BIN} ${CMAKE_ARGS} \
+				-DCMAKE_PREFIX_PATH=${STAGEDIR}${PREFIX} \
+				-DOpenSYCL_DIR="${STAGEDIR}${PREFIX}/lib/cmake/OpenSYCL" \
+				-DOPENSYCL_TARGETS="omp;hip:gfx801" .. && \
+			${SETENV} ${MAKE_ENV} ${MAKE_CMD} && \
+			for f in device_compilation_tests rt_tests sycl_tests; do \
+				${ECHO} "==> running tests from $$f"; \
+				./$${f}; \
+			done
+
 .include <bsd.port.mk>