diff --git a/rest_framework/schemas/openapi.py b/rest_framework/schemas/openapi.py
index 0f68cdfb5..9774a94c7 100644
--- a/rest_framework/schemas/openapi.py
+++ b/rest_framework/schemas/openapi.py
@@ -554,6 +554,8 @@ class AutoSchema(ViewInspector):
             if isinstance(v, URLValidator):
                 schema['format'] = 'uri'
             if isinstance(v, RegexValidator):
+                # In Python, the token \Z does what \z does in other engines.
+                # https://stackoverflow.com/questions/53283160
                 schema['pattern'] = v.regex.pattern.replace('\\Z', '\\z')
             elif isinstance(v, MaxLengthValidator):
                 attr_name = 'maxLength'