diff --git a/tests/letstest/multitester.py b/tests/letstest/multitester.py
index 903b8cc3f..20f9c894f 100644
--- a/tests/letstest/multitester.py
+++ b/tests/letstest/multitester.py
@@ -284,12 +284,14 @@ def deploy_script(cxn, scriptpath, *args):
     cxn.run('./'+scriptfile+' '+args_str)
 
 def run_boulder(cxn):
+    # yes, we're hardcoding the gopath. it's a predetermined AMI.
     boulder_path = '$GOPATH/src/github.com/letsencrypt/boulder'
     cxn.run('cd %s && sudo docker-compose up -d' % boulder_path)
 
 def config_and_launch_boulder(cxn, instance):
-    deploy_script(cxn, 'scripts/boulder_config.sh')
-    run_boulder(cxn)
+    with cxn.prefix('export GOPATH=/home/ubuntu/gopath'):
+        deploy_script(cxn, 'scripts/boulder_config.sh')
+        run_boulder(cxn)
 
 def install_and_launch_certbot(cxn, instance, boulder_url, target):
     local_repo_to_remote(cxn)