diff --git a/tests.ipynb b/tests.ipynb
index 7831532..e2d55ed 100644
--- a/tests.ipynb
+++ b/tests.ipynb
@@ -222,7 +222,7 @@
     "    'Content-Type': 'application/json',\n",
     "    'Accept': 'application/json',\n",
     "    'X-Requested-With': 'piwebapistreams', # Header recomendado pelo PI Web API\n",
-    "    'Authorization': \"Basic dmlkX3ZjbmV0XHN2Yy5waW9zaS5wcmQud2ViYXBpOlN2Y1ByRFdlQkBQaQ==\"\n",
+    'Authorization': "Basic " + __import__('os').environ.get('PI_WEB_API_BASIC_AUTH', '')
     "}\n",
     "\n",
     "web_ids = {}\n",