diff --git a/src/plumpy/message.py b/src/plumpy/message.py
index 024d008f..7b2922eb 100644
--- a/src/plumpy/message.py
+++ b/src/plumpy/message.py
@@ -192,17 +192,16 @@ async def __call__(self, communicator: kiwipy.Communicator, task: Dict[str, Any]
         """
         task_type = task[TASK_KEY]
         if task_type == LAUNCH_TASK:
-            return await self._launch(communicator, **task.get(TASK_ARGS, {}))
+            return await self._launch(**task.get(TASK_ARGS, {}))
         if task_type == CONTINUE_TASK:
-            return await self._continue(communicator, **task.get(TASK_ARGS, {}))
+            return await self._continue(**task.get(TASK_ARGS, {}))
         if task_type == CREATE_TASK:
-            return await self._create(communicator, **task.get(TASK_ARGS, {}))
+            return await self._create(**task.get(TASK_ARGS, {}))
 
         raise TaskRejectedError
 
     async def _launch(
         self,
-        _communicator: kiwipy.Communicator,
         process_class: str,
         persist: bool,
         nowait: bool,
@@ -242,9 +241,7 @@ async def _launch(
 
         return proc.future().result()
 
-    async def _continue(
-        self, _communicator: kiwipy.Communicator, pid: 'PID_TYPE', nowait: bool, tag: Optional[str] = None
-    ) -> Union[PID_TYPE, Any]:
+    async def _continue(self, pid: 'PID_TYPE', nowait: bool, tag: Optional[str] = None) -> Union[PID_TYPE, Any]:
         """
         Continue the process
 
@@ -272,7 +269,6 @@ async def _continue(
 
     async def _create(
         self,
-        _communicator: kiwipy.Communicator,
         process_class: str,
         persist: bool,
         init_args: Optional[Sequence[Any]] = None,
diff --git a/tests/test_message.py b/tests/test_message.py
index 82951afd..0a6ee96c 100644
--- a/tests/test_message.py
+++ b/tests/test_message.py
@@ -37,7 +37,7 @@ async def test_continue():
     del process
     process = None
 
-    result = await launcher._continue(None, **plumpy.create_continue_body(pid)[message.TASK_ARGS])
+    result = await launcher._continue(**plumpy.create_continue_body(pid)[message.TASK_ARGS])
     assert result == utils.DummyProcess.EXPECTED_OUTPUTS
 
 
@@ -51,5 +51,5 @@ async def test_loader_is_used():
     launcher = plumpy.ProcessLauncher(persister=persister, loader=loader)
 
     continue_task = plumpy.create_continue_body(proc.pid)
-    result = await launcher._continue(None, **continue_task[message.TASK_ARGS])
+    result = await launcher._continue(**continue_task[message.TASK_ARGS])
     assert result == utils.DummyProcess.EXPECTED_OUTPUTS