diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 0cbc5a9cb2701c..df431a83972b78 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -1927,7 +1927,14 @@ expression support in the :mod:`re` module).
 
    Return ``True`` if the string is empty or all characters in the string are ASCII,
    ``False`` otherwise.
-   ASCII characters have code points in the range U+0000-U+007F.
+   ASCII characters have code points in the range U+0000-U+007F. For example:
+
+   .. doctest::
+
+      >>> 'ASCII characters'.isascii()
+      True
+      >>> 'µ'.isascii()
+      False
 
    .. versionadded:: 3.7