diff --git a/api-ref/source/os-server-tags.inc b/api-ref/source/os-server-tags.inc
index c672ccedc875..96fbad73fba8 100644
--- a/api-ref/source/os-server-tags.inc
+++ b/api-ref/source/os-server-tags.inc
@@ -15,8 +15,6 @@ Tags have the following restrictions:
 
 -  Tag is a non-empty string.
 
--  Tags are case sensitive.
-
 -  '/' is not allowed to be in a tag name
 
 -  Comma is not allowed to be in a tag name in order to simplify requests that
diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
index 2612ea5510cf..fd912d378bd1 100644
--- a/api-ref/source/parameters.yaml
+++ b/api-ref/source/parameters.yaml
@@ -5016,8 +5016,6 @@ server_tags_create:
 
     - Tag is a non-empty string.
 
-    - Tags are case sensitive.
-
     - '/' is not allowed to be in a tag name
 
     - Comma is not allowed to be in a tag name in order to simplify
diff --git a/nova/api/openstack/compute/rest_api_version_history.rst b/nova/api/openstack/compute/rest_api_version_history.rst
index aa8b7be0a41b..1c974a86425e 100644
--- a/nova/api/openstack/compute/rest_api_version_history.rst
+++ b/nova/api/openstack/compute/rest_api_version_history.rst
@@ -231,7 +231,6 @@ user documentation.
 
   * Tag is a Unicode bytestring no longer than 60 characters.
   * Tag is a non-empty string.
-  * Tags are case sensitive.
   * '/' is not allowed to be in a tag name
   * Comma is not allowed to be in a tag name in order to simplify requests that
     specify lists of tags