diff --git a/storey/flow.py b/storey/flow.py
index 70d566e1..f161e232 100644
--- a/storey/flow.py
+++ b/storey/flow.py
@@ -1613,7 +1613,8 @@ async def _do(self, event):
                     )
                 futures.append(future)
             results: list[_ParallelExecutionRunnableResult] = await asyncio.gather(*futures)
-            event.body = {"input": event.body, "results": {}}
-            for result in results:
-                event.body["results"][result.runnable_name] = {"runtime": result.runtime, "output": result.data}
+            if len(self.runnables) == 1:
+                event.body = results[0].data if results else None
+            else:
+                event.body = {result.runnable_name: result.data for result in results}
             return await self._do_downstream(event)
diff --git a/tests/test_flow.py b/tests/test_flow.py
index 233d8726..a596219c 100644
--- a/tests/test_flow.py
+++ b/tests/test_flow.py
@@ -4771,7 +4771,6 @@ def init(self):
 
     async def run_async(self, data, path):
         await asyncio.sleep(1)
-        print(f"{self.name} returning {self._result}")
         return self._result
 
 
@@ -4856,13 +4855,15 @@ def select_runnables(self, event):
 
     assert end - start < 6
     termination_result = termination_result[0]
-    assert termination_result.keys() == {"input", "results"}
-    assert termination_result["input"] == 0
-    results = termination_result["results"]
-    assert results.keys() == {"busy1", "busy2", "sleep1", "sleep2", "asleep1", "asleep2", "naive"}
-    for result in results.values():
-        assert result["output"] == 1
-        assert 1 < result["runtime"] < 2
+    assert termination_result == {
+        "asleep1": 1,
+        "asleep2": 1,
+        "busy1": 1,
+        "busy2": 1,
+        "naive": 1,
+        "sleep1": 1,
+        "sleep2": 1,
+    }
 
 
 def test_invalid_runnable():
@@ -4896,10 +4897,4 @@ def test_event_input_preservation():
     controller.terminate()
     termination_result = controller.await_termination()
     termination_result = termination_result[0]
-    assert termination_result.keys() == {"input", "results"}
-    assert termination_result["input"] == {"n": 1}
-    results = termination_result["results"]
-    assert results.keys() == {"x"}
-    result = results["x"]
-    assert result.keys() == {"runtime", "output"}
-    assert result["output"] == {"n": 2}
+    assert termination_result == {"n": 2}