diff --git a/rest_framework/__init__.py b/rest_framework/__init__.py
index d812e657c..568e08074 100644
--- a/rest_framework/__init__.py
+++ b/rest_framework/__init__.py
@@ -35,3 +35,7 @@ class RemovedInDRF313Warning(DeprecationWarning):
 
 class RemovedInDRF314Warning(PendingDeprecationWarning):
     pass
+
+
+class RemovedInDRF315Warning(PendingDeprecationWarning):
+    pass
diff --git a/rest_framework/schemas/openapi.py b/rest_framework/schemas/openapi.py
index 122846376..c0b51e406 100644
--- a/rest_framework/schemas/openapi.py
+++ b/rest_framework/schemas/openapi.py
@@ -13,7 +13,8 @@ from django.db import models
 from django.utils.encoding import force_str
 
 from rest_framework import (
-    RemovedInDRF314Warning, exceptions, renderers, serializers
+    RemovedInDRF314Warning, RemovedInDRF315Warning, exceptions, renderers,
+    serializers
 )
 from rest_framework.compat import uritemplate
 from rest_framework.fields import _UnvalidatedField, empty
@@ -812,7 +813,7 @@ class AutoSchema(ViewInspector):
     def _get_reference(self, serializer):
         warnings.warn(
             "Method `_get_reference()` has been renamed to `get_reference()`. "
-            "The old name will be removed in DRF v3.14.",
-            RemovedInDRF314Warning, stacklevel=2
+            "The old name will be removed in DRF v3.15.",
+            RemovedInDRF315Warning, stacklevel=2
         )
         return self.get_reference(serializer)