diff --git a/config.yml.travis b/config.yml.travis
index 54c389b2..d0d3287a 100644
--- a/config.yml.travis
+++ b/config.yml.travis
@@ -14,5 +14,5 @@ logs_path: "/tmp/neocitiestestlogs"
 letsencrypt_key: ./tests/files/letsencrypt.key
 letsencrypt_endpoint: https://acme-staging.api.letsencrypt.org/
 proxy_ips:
-  - 127.0.0.1
-  - 127.0.0.2
+  - 10.0.0.1
+  - 10.0.0.2
diff --git a/workers/delete_cache_order_worker.rb b/workers/delete_cache_order_worker.rb
index 8cad0a00..3c8eb73e 100644
--- a/workers/delete_cache_order_worker.rb
+++ b/workers/delete_cache_order_worker.rb
@@ -11,6 +11,8 @@ class DeleteCacheOrderWorker
     #proxy_ips = Resolv.getaddresses($config['cache_purge_ips_uri']).keep_if {|r| !r.match(/:/)}
     proxy_ips = $config['proxy_ips']
 
+    return if proxy_ips.nil? || proxy_ips.empty?
+
     proxy_ips.each do |proxy_ip|
       DeleteCacheWorker.perform_async proxy_ip, username, path
     end
diff --git a/workers/purge_cache_order_worker.rb b/workers/purge_cache_order_worker.rb
index aa506504..90c3ceec 100644
--- a/workers/purge_cache_order_worker.rb
+++ b/workers/purge_cache_order_worker.rb
@@ -11,6 +11,8 @@ class PurgeCacheOrderWorker
     proxy_ips = $config['proxy_ips']
     #proxy_ips = Resolv.getaddresses($config['cache_purge_ips_uri']).keep_if {|r| !r.match(/:/)}
 
+    return if proxy_ips.nil? || proxy_ips.empty?
+
     proxy_ips.each do |proxy_ip|
       PurgeCacheWorker.perform_async proxy_ip, username, path
     end