diff --git a/.travis.yml b/.travis.yml
index 7d5fe0e..572d799 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,7 +26,7 @@ script:
   - ./letsencrypt.sh --cron
   - ./letsencrypt.sh
   - openssl x509 -in "certs/${TMP_URL}/cert.pem" -noout -text
-  - errout="$(openssl verify -verbose -CAfile "certs/${TMP_URL}/fullchain.pem" -purpose sslserver "certs/${TMP_URL}/fullchain.pem" | grep -v ': OK$')"
+  - export errout="$(openssl verify -verbose -CAfile "certs/${TMP_URL}/fullchain.pem" -purpose sslserver "certs/${TMP_URL}/fullchain.pem" | grep -v ': OK$')"
   - if [[ ! -z "${errout}" ]]; then printf -- "${errout}"; exit 1; fi
   - rm private_key.pem
   - ./letsencrypt.sh --revoke "certs/${TMP_URL}/cert.pem" --privkey "certs/${TMP_URL}/privkey.pem"