diff --git a/tox.ini b/tox.ini
index dd1015d72..f4e04caa9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@ envlist = py{34,35,36},flake8
 # not really matter, should be just different from the toplevel dir.
 changedir = {toxworkdir}
 deps =
-     -rrequirements.d/development.txt
+     -rrequirements.d/development.lock.txt
      -rrequirements.d/fuse.txt
 commands = py.test -n {env:XDISTN:4} -rs --cov=borg --cov-config=../.coveragerc --benchmark-skip --pyargs {posargs:borg.testsuite}
 # fakeroot -u needs some env vars: