diff --git a/community/black/APKBUILD b/community/black/APKBUILD
index d6dc023182d4bfcf534c3ba721902c30464bd72d..e24218a86d938c0f583864d18c0a803ad30a3550 100644
--- a/community/black/APKBUILD
+++ b/community/black/APKBUILD
@@ -1,14 +1,15 @@
 # Contributor: Michał Polański <michal@polanski.me>
 # Maintainer: Michał Polański <michal@polanski.me>
 pkgname=black
-pkgver=19.10_beta0
+pkgver=20.8_beta1
 _pkgver=${pkgver/_beta/b}
 pkgrel=0
 pkgdesc="The uncompromising Python code formatter"
 url="https://github.com/psf/black"
 arch="noarch !s390x !mips !mips64" # tests fail on s390x and mips
 license="MIT"
-depends="python3 py3-click py3-attrs py3-toml py3-appdirs py3-typed-ast py3-regex py3-pathspec"
+depends="python3 py3-click py3-attrs py3-toml py3-appdirs py3-typed-ast py3-regex
+	py3-pathspec py3-typing-extensions py3-mypy-extensions"
 makedepends="py3-setuptools"
 checkdepends="py3-aiohttp py3-aiohttp-cors"
 source="https://files.pythonhosted.org/packages/source/b/black/black-$_pkgver.tar.gz"
@@ -19,11 +20,16 @@ build() {
 }
 
 check() {
-	python3 -m unittest tests/test_black.py
+	# temporary installation for testing
+	python3 setup.py install --root="$PWD"/test_install --skip-build
+
+	PATH="$PWD/test_install/usr/bin:$PATH" \
+		PYTHONPATH="$(echo $PWD/test_install/usr/lib/python3*/site-packages)" \
+		python3 -m unittest tests/test_black.py
 }
 
 package() {
-	python3 setup.py install --prefix=/usr --root="$pkgdir" --skip-build
+	python3 setup.py install --root="$pkgdir" --skip-build
 }
 
-sha512sums="abc6d2623ab50e59bed01fdb7a6ee7434c2d3e0f779a046d9141087aa6ef46b73b3aacc6bf84ac70b9384817bd2c707a3fa262811f11a2f61a99251d2b84dd02  black-19.10b0.tar.gz"
+sha512sums="f047c2a1ce759a8e19eed2e1869752bb8a63bf17a554aff5d9e834a48cd390b23918b78e01d5c36c0fb7599439d7e422847bde504ff698d53df5c5939a8870d2  black-20.8b1.tar.gz"