diff --git a/requirements.d/development.txt b/requirements.d/development.txt
index a0cb3c2ac..a07f0b02a 100644
--- a/requirements.d/development.txt
+++ b/requirements.d/development.txt
@@ -1,6 +1,7 @@
 virtualenv<14.0
 tox
 pytest
+pytest-xdist
 pytest-cov
 pytest-benchmark
 Cython
diff --git a/tox.ini b/tox.ini
index d44009e46..ce0aaacb0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,7 +12,7 @@ deps =
      -rrequirements.d/development.txt
      -rrequirements.d/attic.txt
      -rrequirements.d/fuse.txt
-commands = py.test -rs --cov=borg --cov-config=../.coveragerc --benchmark-skip --pyargs {posargs:borg.testsuite}
+commands = py.test -n 8 -rs --cov=borg --cov-config=../.coveragerc --benchmark-skip --pyargs {posargs:borg.testsuite}
 # fakeroot -u needs some env vars:
 passenv = *