diff --git a/bin/pre-test b/bin/pre-test
index 39e233b7..f6055912 100755
--- a/bin/pre-test
+++ b/bin/pre-test
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -e
+
 mkdir -p .tmp/modules
 
 ./node_modules/.bin/sinopia ./tests/config.yml & echo $! >> .tmp/sinopia.pid
@@ -12,4 +14,4 @@ cp ~/.npmrc .tmp/.npmrc
 
 cp tests/.npmrc ~/.npmrc
 
-npm config set registry http://localhost:4873/
+npm config set registry http://127.0.0.1:4873/
diff --git a/tests/scenarios/prepublish.js b/tests/scenarios/prepublish.js
index 625be3f9..3f34cd37 100644
--- a/tests/scenarios/prepublish.js
+++ b/tests/scenarios/prepublish.js
@@ -23,6 +23,7 @@ module.exports = function (test, createModule) {
         nixt()
           .cwd(cwd)
           .env('CI', true)
+          .env('npm_config_registry', 'http://127.0.0.1:4873/')
           .exec('git commit --allow-empty -m "' + message + '"')
           .run('npm run prepublish')
           .code(code)