diff --git a/irctest/controllers/limnoria.py b/irctest/controllers/limnoria.py
index bf74f7a..fd39447 100644
--- a/irctest/controllers/limnoria.py
+++ b/irctest/controllers/limnoria.py
@@ -31,7 +31,7 @@ class LimnoriaController(BaseClientController, DirectoryBasedController):
     supported_sasl_mechanisms = {
             'PLAIN', 'ECDSA-NIST256P-CHALLENGE', 'SCRAM-SHA-256', 'EXTERNAL',
             }
-    supported_capabilities = set()  # Not exhaustive
+    supported_capabilities = set(['sts'])  # Not exhaustive
 
     def create_config(self):
         create_config = super().create_config()
diff --git a/irctest/controllers/sopel.py b/irctest/controllers/sopel.py
index 17c51d0..d9f0307 100644
--- a/irctest/controllers/sopel.py
+++ b/irctest/controllers/sopel.py
@@ -24,7 +24,7 @@ class SopelController(BaseClientController):
     supported_sasl_mechanisms = {
             'PLAIN',
             }
-    supported_caps = set()  # Not exhaustive
+    supported_capabilities = set()  # Not exhaustive
 
     def __init__(self):
         super().__init__()