diff --git a/doc/source/microversion_testing.rst b/doc/source/microversion_testing.rst
index aca1845..9c4ac0b 100644
--- a/doc/source/microversion_testing.rst
+++ b/doc/source/microversion_testing.rst
@@ -302,6 +302,10 @@
 
   .. _2.2: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id2
 
+  * `2.6`_
+
+  .. _2.6: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id5
+
   * `2.10`_
 
   .. _2.10: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id9
@@ -310,6 +314,10 @@
 
   .. _2.20: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id18
 
+  * `2.21`_
+
+  .. _2.21: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id19
+
   * `2.25`_
 
   .. _2.25: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#maximum-in-mitaka