diff --git a/pandas/core/config.py b/pandas/core/config.py
index 1c0eb60b8ec2f..39ed2f9545266 100644
--- a/pandas/core/config.py
+++ b/pandas/core/config.py
@@ -747,8 +747,8 @@ def is_type_factory(_type):
 
     Returns
     -------
-    validator - a function of a single argument x , which returns the
-                True if type(x) is equal to `_type`
+    validator - a function of a single argument x , which raises
+                ValueError if type(x) is not equal to `_type`
 
     """
 
@@ -768,8 +768,8 @@ def is_instance_factory(_type):
 
     Returns
     -------
-    validator - a function of a single argument x , which returns the
-                True if x is an instance of `_type`
+    validator - a function of a single argument x , which raises
+                ValueError if x is not an instance of `_type`
 
     """
     if isinstance(_type, (tuple, list)):