diff --git a/src/tests/joinir_runner_standalone.rs b/src/tests/joinir_runner_standalone.rs
index 7f1b8a9f..e7596c4f 100644
--- a/src/tests/joinir_runner_standalone.rs
+++ b/src/tests/joinir_runner_standalone.rs
@@ -148,8 +148,10 @@ fn joinir_runner_standalone_skip_ws() {
 /// - Input: "   abc  " → Output: "abc  " (only leading spaces removed)
 /// - Input: "" → Output: ""
 /// - Input: "abc" → Output: "abc"
+///
+/// ## Phase 29 昇格 (2025-11-25)
+/// skip_ws に続いて本線テストに昇格。NYASH_JOINIR_EXPERIMENT=1 トグルで制御。
 #[test]
-#[ignore]
 fn joinir_runner_standalone_trim() {
     if !require_experiment_toggle() {
         return;