Index: head/graphics/py-pygraphviz/Makefile
===================================================================
--- head/graphics/py-pygraphviz/Makefile	(revision 559050)
+++ head/graphics/py-pygraphviz/Makefile	(revision 559051)
@@ -1,36 +1,38 @@
 # Created by: Hye-Shik Chang <perky@fallin.lv>
 # $FreeBSD$
 
 PORTNAME=	pygraphviz
-PORTVERSION=	1.5
+PORTVERSION=	1.6
 CATEGORIES=	graphics python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	python@FreeBSD.org
 COMMENT=	Python interface to GraphViz agraph
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libcgraph.so:graphics/graphviz
-TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}nose>=0.10.1:devel/py-nose@${PY_FLAVOR}
+TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}nose>=1.3.7:devel/py-nose@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}doctest-ignore-unicode>=0.1.2:devel/py-doctest-ignore-unicode@{PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}mock>=2.0.0:devel/py-mock@${PY_FLAVOR}
 
-USES=		pkgconfig python zip
+USES=		pkgconfig python:3.6+ zip
 USE_PYTHON=	autoplist concurrent distutils
 
 PYDISTUTILS_BUILD_TARGET=	build build_ext
 PYDISTUTILS_BUILDARGS=		--include-dirs=${LOCALBASE}/include \
 				--library-dirs=${LOCALBASE}/lib/graphviz
 
 post-patch:
 	@${REINPLACE_CMD} -e 's+%%LOCALBASE%%+${LOCALBASE}+; \
 		s+^docdirbase.*=.*+docdirbase = "${DOCSDIR:S/${PREFIX}\///}"+' ${WRKSRC}/setup.py
 
 post-install:
 	${STRIP_CMD} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/pygraphviz/_graphviz.so
 
 do-test:
 	@cd ${WRKSRC} && ${PYTHON_CMD} ${PYDISTUTILS_SETUP} test
 
 .include <bsd.port.mk>
Index: head/graphics/py-pygraphviz/distinfo
===================================================================
--- head/graphics/py-pygraphviz/distinfo	(revision 559050)
+++ head/graphics/py-pygraphviz/distinfo	(revision 559051)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1560202080
-SHA256 (pygraphviz-1.5.zip) = 50a829a305dc5a0fd1f9590748b19fece756093b581ac91e00c2c27c651d319d
-SIZE (pygraphviz-1.5.zip) = 117810
+TIMESTAMP = 1605245581
+SHA256 (pygraphviz-1.6.zip) = 411ae84a5bc313e3e1523a1cace59159f512336318a510573b47f824edef8860
+SIZE (pygraphviz-1.6.zip) = 117043
Index: head/graphics/py-pygraphviz/pkg-descr
===================================================================
--- head/graphics/py-pygraphviz/pkg-descr	(revision 559050)
+++ head/graphics/py-pygraphviz/pkg-descr	(revision 559051)
@@ -1,6 +1,6 @@
 PyGraphviz is a Python interface to the Graphviz graph layout and
 visualization package. With PyGraphviz you can create, edit, read,
 write, and draw graphs using Python to access the Graphviz graph
 data structure and layout algorithms.
 
-WWW: http://pygraphviz.github.io
+WWW: https://pygraphviz.github.io