diff --git a/system/t12_api/tasks.py b/system/t12_api/tasks.py
index d300eff47..5291689cc 100644
--- a/system/t12_api/tasks.py
+++ b/system/t12_api/tasks.py
@@ -12,6 +12,7 @@ def _create_mirror(self, dist):
         mirror_desc = {'Name': mirror_name,
                        'ArchiveURL': 'http://repo.aptly.info/system-tests/packagecloud.io/varnishcache/varnish30/debian/',
                        'Distribution': dist,
+                       'Architectures': ["amd64", "i386"],
                        'Components': ['main']}
         mirror_desc['IgnoreSignatures'] = True
         resp = self.post("/api/mirrors", json=mirror_desc)