diff --git a/docs/usage/tox.rst b/docs/usage/tox.rst
index c5b61e8f..14ad07e5 100644
--- a/docs/usage/tox.rst
+++ b/docs/usage/tox.rst
@@ -40,7 +40,7 @@ BuildKite
 All variables:
 
 - ``BUILDKITE``
-- ``BUILDKIT_JOB_ID``
+- ``BUILDKITE_JOB_ID``
 - ``BUILDKITE_BRANCH``
 
 CircleCI