diff --git a/tox.ini b/tox.ini
index 386ab4b..a920314 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ envlist = py36,pep8
 deps = git+git://github.com/OneGov/onegov_testing.git#egg=onegov_testing
        -e{toxinidir}[test]
 
-install_command = pip install {opts} {packages}
+install_command = pip install {opts} {packages} --no-binary pillow
 
 commands = coverage run --source onegov.form -m py.test {posargs}
            coverage report