diff --git a/client/scripts/ability_cast_client.gd b/client/scripts/ability_cast_client.gd
index 6a6bc53..4cc8b57 100644
--- a/client/scripts/ability_cast_client.gd
+++ b/client/scripts/ability_cast_client.gd
@@ -1,7 +1,8 @@
 extends Node
 
 ## NEO-31: prototype HTTP client for `POST /game/players/{id}/ability-cast`.
-## NEO-28: emits [signal cast_result_received] when the response body is JSON [AbilityCastResponse] v1.
+## NEO-28: emits [signal cast_result_received] when the response body is JSON
+## [AbilityCastResponse] v1.
 signal cast_result_received(accepted: bool, reason_code: String)
 
 @export var base_url: String = "http://127.0.0.1:5253"
diff --git a/client/test/ability_cast_client_test.gd b/client/test/ability_cast_client_test.gd
index 1f4970b..25df6b7 100644
--- a/client/test/ability_cast_client_test.gd
+++ b/client/test/ability_cast_client_test.gd
@@ -149,7 +149,11 @@ func test_cast_result_received_emits_false_with_reason_on_denied() -> void:
 	)
 	var c := _make_client(transport)
 	var got: Array = []
-	c.connect("cast_result_received", func(accepted: bool, reason: String): got.append([accepted, reason]))
+	c.connect(
+		"cast_result_received",
+		func(accepted: bool, reason: String) -> void:
+			got.append([accepted, reason])
+	)
 	# Act
 	var started: bool = bool(c.call("request_cast", 0, "prototype_pulse", "prototype_target_alpha"))
 	# Assert
@@ -165,7 +169,11 @@ func test_cast_result_received_emits_true_with_empty_reason_on_accepted() -> voi
 	transport.enqueue(HTTPRequest.RESULT_SUCCESS, 200, '{"schemaVersion":1,"accepted":true}')
 	var c := _make_client(transport)
 	var got: Array = []
-	c.connect("cast_result_received", func(accepted: bool, reason: String): got.append([accepted, reason]))
+	c.connect(
+		"cast_result_received",
+		func(accepted: bool, reason: String) -> void:
+			got.append([accepted, reason])
+	)
 	# Act
 	var started: bool = bool(c.call("request_cast", 0, "prototype_pulse", null))
 	# Assert