diff --git a/monitoring/uss_qualifier/resources/interuss/query_behavior.py b/monitoring/uss_qualifier/resources/interuss/query_behavior.py
index f236dfa246..1ed1271f3f 100644
--- a/monitoring/uss_qualifier/resources/interuss/query_behavior.py
+++ b/monitoring/uss_qualifier/resources/interuss/query_behavior.py
@@ -20,6 +20,9 @@ class QueryBehaviorSpecification(ImplicitDict):
     add_request_id: Optional[bool]
     """Whether to automatically add a `request_id` field to any request with a JSON body and no pre-existing `request_id` field"""
 
+    fake_netlocs: Optional[list[str]]
+    """Network locations well-known to be fake and for which a request should fail immediately without being attempted."""
+
 
 class QueryBehaviorResource(Resource[QueryBehaviorSpecification]):
     """When declared, this resource adjusts the settings for all queries made by uss_qualifier.
@@ -81,3 +84,9 @@ def __init__(
             logger.info(
                 f"QueryBehaviorResource: Fetch query set to {'' if settings.add_request_id else 'not '} add `request_id`"
             )
+
+        if "fake_netlocs" in specification and specification.fake_netlocs is not None:
+            settings.fake_netlocs = tuple(specification.fake_netlocs)
+            logger.info(
+                f"QueryBehaviorResource: Fake network locations set to {settings.fake_netlocs}"
+            )
diff --git a/schemas/monitoring/uss_qualifier/resources/interuss/query_behavior/QueryBehaviorSpecification.json b/schemas/monitoring/uss_qualifier/resources/interuss/query_behavior/QueryBehaviorSpecification.json
index 07eadb979f..9e0e970ee6 100644
--- a/schemas/monitoring/uss_qualifier/resources/interuss/query_behavior/QueryBehaviorSpecification.json
+++ b/schemas/monitoring/uss_qualifier/resources/interuss/query_behavior/QueryBehaviorSpecification.json
@@ -28,6 +28,16 @@
         "null"
       ]
     },
+    "fake_netlocs": {
+      "description": "Network locations well-known to be fake and for which a request should fail immediately without being attempted.",
+      "items": {
+        "type": "string"
+      },
+      "type": [
+        "array",
+        "null"
+      ]
+    },
     "read_timeout_seconds": {
       "description": "Number of seconds to allow for a request to complete after establishing a connection.  Use 0 for no timeout.",
       "type": [