diff --git a/pyinfra/server/server.py b/pyinfra/server/server.py
index d88c2dd..afd6828 100644
--- a/pyinfra/server/server.py
+++ b/pyinfra/server/server.py
@@ -29,7 +29,7 @@ def make_processor_fn(operation, buffer_size, batched):
 
 class Processor(abc.ABC):
     def __init__(self, processor_fn):
-        self.execution_queue = []
+        self.execution_queue = chain([])
         self.processor_fn = processor_fn
 
     def run(self, package, final):