diff --git a/tox.ini b/tox.ini
index fd421cf8e..8a6a33226 100644
--- a/tox.ini
+++ b/tox.ini
@@ -276,8 +276,8 @@ passenv = DOCKER_*
 setenv = {[testenv:py27-oldest]setenv}
 
 [testenv:travis-test-farm-tests]
-commands = tests/letstest/travis.sh
-deps = -r tests/letstest/requirements.txt
+commands = {toxinidir}/tests/letstest/travis.sh
+deps = -rtests/letstest/requirements.txt
 passenv =
     AWS_*
     encrypted_*