diff --git a/pyinfra/test/unit_tests/conftest.py b/pyinfra/test/unit_tests/conftest.py
index 0d89c54..328a76a 100644
--- a/pyinfra/test/unit_tests/conftest.py
+++ b/pyinfra/test/unit_tests/conftest.py
@@ -90,4 +90,11 @@ def queue_manager(queue_manager_name) -> QueueManager:
 
 @pytest.fixture
 def callback():
-    return lambda x: x**2
+    return lambda x: x * 2
+
+
+@pytest.fixture
+def analysis_callback(callback):
+    def inner(data: bytes):
+        return callback(data.decode())
+    return inner
diff --git a/pyinfra/test/unit_tests/consumer_test.py b/pyinfra/test/unit_tests/consumer_test.py
index ffbede8..66e2bb3 100644
--- a/pyinfra/test/unit_tests/consumer_test.py
+++ b/pyinfra/test/unit_tests/consumer_test.py
@@ -21,7 +21,7 @@ class TestConsumer:
     ):
 
         def produce_items():
-            return range(3)
+            return map(str, range(3))
 
         queue_manager.clear()
 
@@ -33,4 +33,4 @@ class TestConsumer:
         for _, r in zip(produce_items(), requests):
             queue_manager.publish_response(r, callback)
 
-        assert queue_manager.output_queue.to_list() == [0, 1, 4]
+        assert queue_manager.output_queue.to_list() == ["00", "11", "22"]
diff --git a/pyinfra/test/unit_tests/queue_visitor_test.py b/pyinfra/test/unit_tests/queue_visitor_test.py
index ada1488..8f1aba3 100644
--- a/pyinfra/test/unit_tests/queue_visitor_test.py
+++ b/pyinfra/test/unit_tests/queue_visitor_test.py
@@ -4,8 +4,8 @@ from pyinfra.visitor import QueueVisitor, get_object_descriptor
 
 
 @pytest.fixture()
-def visitor(storage, callback):
-    return QueueVisitor(storage, callback)
+def visitor(storage, analysis_callback):
+    return QueueVisitor(storage, analysis_callback)
 
 
 @pytest.fixture()
@@ -21,3 +21,9 @@ class TestStorage:
         storage.put_object(**get_object_descriptor(body), data=b"content")
         data_received = visitor.load_data(body)
         assert b"content" == data_received
+
+    def test_visitor_call_method_pulls_data_and_executes_callback(self, visitor, body, storage, bucket_name):
+        storage.clear_bucket(bucket_name)
+        storage.put_object(**get_object_descriptor(body), data="2".encode())
+        response_body = visitor(body)
+        assert response_body == "22"
diff --git a/pyinfra/visitor.py b/pyinfra/visitor.py
index fbe901d..a011d09 100644
--- a/pyinfra/visitor.py
+++ b/pyinfra/visitor.py
@@ -28,8 +28,8 @@ class QueueVisitor:
     def load_data(self, body):
         return self.storage.get_object(**get_object_descriptor(body))
 
-    def process_data(self):
-        pass
+    def process_data(self, data):
+        return self.callback(data)
 
     def __call__(self, body):
-        pass
+        return self.process_data(self.load_data(body))