diff --git a/integration_tests/bin/blockstack-test-scenario b/integration_tests/bin/blockstack-test-scenario
index 38a21e5fc..c693028b7 100755
--- a/integration_tests/bin/blockstack-test-scenario
+++ b/integration_tests/bin/blockstack-test-scenario
@@ -164,13 +164,13 @@ DEFAULT_GAIA_HUB_CONFIG_TEMPLATE = """
   "servername": "%s",
   "port": 4001,
   "driver": "disk",
-  "readURL": "http://%s:4000/hub",
+  "readURL": "http://%s:4000/hub/",
   "proofsConfig": {
     "proofsRequired" : 0
   },
   "diskSettings": {
      "storageRootDirectory": "@WORKING_DIR@/gaia-hub",
-     "readURL": "http://%s:4000/hub"
+     "readURL": "http://%s:4000/hub/"
   },
   "argsTransport": {
     "level": "debug",
@@ -407,6 +407,7 @@ class GaiaServerRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
 
                 self.send_header(h, res.headers[h])
 
+            self.send_header('Access-Control-Allow-Origin', '*')
             self.send_header('Content-Length', '{}'.format(len(res.text)))
             self.end_headers()
             self.wfile.write(res.text)
@@ -415,6 +416,7 @@ class GaiaServerRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
         if not self.path.startswith('/hub/'):
             log.error("Invalid request path '{}'".format(self.path))
             self.send_response(401, 'Invalid request path')
+            self.send_header('Access-Control-Allow-Origin', '*')
             self.end_headers()
             return 
 
@@ -425,11 +427,13 @@ class GaiaServerRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
         if not os.path.exists(file_path):
             log.error("No such file or directory: '{}'".format(file_path))
             self.send_response(404, 'No such file or directory')
+            self.send_header('Access-Control-Allow-Origin', '*')
             self.end_headers()
             return 
 
         sb = os.stat(file_path)
         self.send_response(200)
+        self.send_header('Access-Control-Allow-Origin', '*')
         self.send_header('Content-Type', 'application/octet-stream')
         self.send_header('Content-Length', '{}'.format(sb.st_size))
         self.end_headers()
@@ -464,6 +468,13 @@ class GaiaServerRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
         return
 
 
+    def do_OPTONS(self):
+        self.send_response(200)
+        self.send_header('Access-Control-Allow-Origin', '*')
+        self.end_headers()
+        return
+
+
 class GaiaServer(BaseHTTPServer.HTTPServer):
     def __init__(self, storage_root, port, upstream_gaia_url):
         BaseHTTPServer.HTTPServer.__init__(self, (TEST_CLIENT_BIND, port), GaiaServerRequestHandler)