diff --git a/rest_framework/schemas/openapi.py b/rest_framework/schemas/openapi.py
index 8c6a7a46e1..a94b3a81ac 100644
--- a/rest_framework/schemas/openapi.py
+++ b/rest_framework/schemas/openapi.py
@@ -135,7 +135,10 @@ def _get_operation_id(self, path, method):
                 name = name[:-7]
             elif name.endswith('View'):
                 name = name[:-4]
-            if action != 'list' and name.endswith(action):  # ListView, UpdateAPIView, ThingDelete ...
+
+            # Due to camel-casing of classes and `action` being lowercase, apply title in order to find if action truly
+            # comes at the end of the name
+            if name.endswith(action.title()):  # ListView, UpdateAPIView, ThingDelete ...
                 name = name[:-len(action)]
 
         if action == 'list' and not name.endswith('s'):  # listThings instead of listThing