1 files changed, 9 insertions, 6 deletions
diff --git a/django/core/cache/backends/dummy.py b/django/core/cache/backends/dummy.py
index 4337484cb1..f73b7408bc 100644
--- a/django/core/cache/backends/dummy.py
+++ b/django/core/cache/backends/dummy.py
@@ -6,22 +6,25 @@ class CacheClass(BaseCache):
     def __init__(self, *args, **kwargs):
         pass
 
-    def add(self, *args, **kwargs):
+    def add(self, key, *args, **kwargs):
+        self.validate_key(key)
         return True
 
     def get(self, key, default=None):
+        self.validate_key(key)
         return default
 
-    def set(self, *args, **kwargs):
-        pass
+    def set(self, key, *args, **kwargs):
+        self.validate_key(key)
 
-    def delete(self, *args, **kwargs):
-        pass
+    def delete(self, key, *args, **kwargs):
+        self.validate_key(key)
 
     def get_many(self, *args, **kwargs):
         return {}
 
-    def has_key(self, *args, **kwargs):
+    def has_key(self, key, *args, **kwargs):
+        self.validate_key(key)
         return False
 
     def set_many(self, *args, **kwargs):