diff --git a/atst/domain/exceptions.py b/atst/domain/exceptions.py
index 53c83548..ec574232 100644
--- a/atst/domain/exceptions.py
+++ b/atst/domain/exceptions.py
@@ -30,7 +30,3 @@ class UnauthenticatedError(Exception):
     @property
     def message(self):
         return str(self)
-
-
-class CRLValidationError(Exception):
-    pass