Index: Makefile
===================================================================
--- Makefile	(revision 467141)
+++ Makefile	(working copy)
@@ -11,11 +11,16 @@
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/COPYING
 
-USES=		cmake:outsource python:3.4+,test
+USES=		cmake:outsource
 USE_GITHUB=	yes
 GH_ACCOUNT=	commonmark
 USE_LDCONFIG=	yes
 
+OPTIONS_DEFINE=		SPECTESTS
+SPECTESTS_DESC=		Run the specs tests
+SPECTESTS_USES=		python:3.4+,test
+SPECTESTS_CMAKE_BOOL=	CMARK_TESTS
+
 CMAKE_ARGS=	-DCMAKE_INSTALL_LIBDIR:STRING="lib"
 PLIST_SUB=	VERSION=${PORTVERSION}
 TEST_TARGET=	test