diff --git a/lib/absinthe/middleware/async.ex b/lib/absinthe/middleware/async.ex
index c121af0481..52bdaccdb1 100644
--- a/lib/absinthe/middleware/async.ex
+++ b/lib/absinthe/middleware/async.ex
@@ -113,10 +113,10 @@ defmodule Absinthe.Middleware.Async do
 
   # Optionally use `async/1` function from `opentelemetry_process_propagator` if available
   if Code.ensure_loaded?(OpentelemetryProcessPropagator.Task) do
-    @spec async((() -> any)) :: Task.t()
+    @spec async((-> any)) :: Task.t()
     defdelegate async(fun), to: OpentelemetryProcessPropagator.Task
   else
-    @spec async((() -> any)) :: Task.t()
+    @spec async((-> any)) :: Task.t()
     defdelegate async(fun), to: Task
   end
 end
diff --git a/lib/absinthe/middleware/batch.ex b/lib/absinthe/middleware/batch.ex
index 4ab60719b1..1030fbb098 100644
--- a/lib/absinthe/middleware/batch.ex
+++ b/lib/absinthe/middleware/batch.ex
@@ -209,10 +209,10 @@ defmodule Absinthe.Middleware.Batch do
 
   # Optionally use `async/1` function from `opentelemetry_process_propagator` if available
   if Code.ensure_loaded?(OpentelemetryProcessPropagator.Task) do
-    @spec async((() -> any)) :: Task.t()
+    @spec async((-> any)) :: Task.t()
     defdelegate async(fun), to: OpentelemetryProcessPropagator.Task
   else
-    @spec async((() -> any)) :: Task.t()
+    @spec async((-> any)) :: Task.t()
     defdelegate async(fun), to: Task
   end
 end
diff --git a/lib/absinthe/resolution/helpers.ex b/lib/absinthe/resolution/helpers.ex
index 1746b27c94..70f1e21738 100644
--- a/lib/absinthe/resolution/helpers.ex
+++ b/lib/absinthe/resolution/helpers.ex
@@ -34,8 +34,8 @@ defmodule Absinthe.Resolution.Helpers do
   end
   ```
   """
-  @spec async((() -> term)) :: {:middleware, Middleware.Async, term}
-  @spec async((() -> term), opts :: [{:timeout, pos_integer}]) ::
+  @spec async((-> term)) :: {:middleware, Middleware.Async, term}
+  @spec async((-> term), opts :: [{:timeout, pos_integer}]) ::
           {:middleware, Middleware.Async, term}
   def async(fun, opts \\ []) do
     {:middleware, Middleware.Async, {fun, opts}}
diff --git a/test/absinthe/integration/execution/operation_by_name_test.exs b/test/absinthe/integration/execution/operation_by_name_test.exs
index a67a17df38..fcdc6a8860 100644
--- a/test/absinthe/integration/execution/operation_by_name_test.exs
+++ b/test/absinthe/integration/execution/operation_by_name_test.exs
@@ -55,7 +55,9 @@ defmodule Elixir.Absinthe.Integration.Execution.OperationByNameTest do
 
   test "scenario #4" do
     assert {:ok, %{data: %{"thing" => %{"name" => "Bar"}}}} ==
-             Absinthe.run(@query, Absinthe.Fixtures.Things.MacroSchema, operation_name: "ThingBar")
+             Absinthe.run(@query, Absinthe.Fixtures.Things.MacroSchema,
+               operation_name: "ThingBar"
+             )
   end
 
   @query """