diff --git a/lib/bb/event.py b/lib/bb/event.py
index bbece58..f3fb521 100644
--- a/lib/bb/event.py
+++ b/lib/bb/event.py
@@ -517,3 +517,13 @@ class PackageInfo(Event):
     def __init__(self, pkginfolist):
         Event.__init__(self)
         self._pkginfolist = pkginfolist
+
+class SanityCheck(Event):
+    """
+    Event to issue sanity check
+    """
+
+class SanityCheckPassed(Event):
+    """
+    Event to indicate sanity check is passed
+    """