diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dc6819c2..31ef98e5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,7 +50,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu]
-        pyver: ['3.7', '3.8', '3.9', '3.10']
+        pyver: ['3.7', '3.8', '3.9', '3.10', '3.11']
         redis: ['latest']
         ujson: ['']
         include:
diff --git a/tests/utils.py b/tests/utils.py
index c62f77ba..68c45f26 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -5,3 +5,6 @@ class Keys(str, Enum):
     KEY: str = "key"
     KEY_1: str = "random"
     KEY_LOCK: str = "key-lock"
+
+    def __format__(self, spec):
+        return self.value