diff --git a/django/core/exceptions.py b/django/core/exceptions.py
index 0e24f6cb18a5..93b2bcb87fa5 100644
--- a/django/core/exceptions.py
+++ b/django/core/exceptions.py
@@ -58,7 +58,7 @@ class DisallowedHost(SuspiciousOperation):
 
 
 class DisallowedRedirect(SuspiciousOperation):
-    """Redirect to scheme not in allowed list"""
+    """Redirect was too long or scheme was not in allowed list."""
 
     pass