diff --git a/travis_docker_env.list b/travis_docker_env.list
new file mode 100644
index 00000000..97bd597b
--- /dev/null
+++ b/travis_docker_env.list
@@ -0,0 +1,9 @@
+# environment variables that are passed from Travis to Docker
+DOCUMENTER_KEY
+TRAVIS_BRANCH
+TRAVIS_PULL_REQUEST
+TRAVIS_REPO_SLUG
+TRAVIS_TAG
+TRAVIS_OS_NAME
+TRAVIS_JULIA_VERSION
+JULIA_PROJECT