From 5f3e57ef10d8e497ab8a32f5cb11e74c30485dee Mon Sep 17 00:00:00 2001
From: Brad Warren <bmw@eff.org>
Date: Tue, 17 Sep 2019 13:28:41 -0700
Subject: [PATCH] Use trusty in all oldest tests.

---
 .travis.yml | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 17ee39fb8..4d4ea5f55 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -132,21 +132,37 @@ matrix:
       <<: *extended-test-suite
     - python: "2.7"
       env: ACME_SERVER=boulder-v1 TOXENV=integration-certbot-oldest
+      # Ubuntu Trusty or older must be used because the oldest version of
+      # cryptography we support cannot be compiled against the version of
+      # OpenSSL in Xenial or newer.
+      dist: trusty
       sudo: required
       services: docker
       <<: *extended-test-suite
     - python: "2.7"
       env: ACME_SERVER=boulder-v2 TOXENV=integration-certbot-oldest
+      # Ubuntu Trusty or older must be used because the oldest version of
+      # cryptography we support cannot be compiled against the version of
+      # OpenSSL in Xenial or newer.
+      dist: trusty
       sudo: required
       services: docker
       <<: *extended-test-suite
     - python: "2.7"
       env: ACME_SERVER=boulder-v1 TOXENV=integration-nginx-oldest
+      # Ubuntu Trusty or older must be used because the oldest version of
+      # cryptography we support cannot be compiled against the version of
+      # OpenSSL in Xenial or newer.
+      dist: trusty
       sudo: required
       services: docker
       <<: *extended-test-suite
     - python: "2.7"
       env: ACME_SERVER=boulder-v2 TOXENV=integration-nginx-oldest
+      # Ubuntu Trusty or older must be used because the oldest version of
+      # cryptography we support cannot be compiled against the version of
+      # OpenSSL in Xenial or newer.
+      dist: trusty
       sudo: required
       services: docker
       <<: *extended-test-suite