diff --git a/.github/workflows/test_ppc64.yaml b/.github/workflows/test_ppc64.yaml
index be0551a..9df5881 100644
--- a/.github/workflows/test_ppc64.yaml
+++ b/.github/workflows/test_ppc64.yaml
@@ -34,7 +34,7 @@ jobs:
       env:
         GOARCH: ${{ matrix.arch }}      
 
-    - name: Test
-      run: go test -v -short ./internal/sm2ec/...
+    - name: Test SM2EC
+      run: go test -v ./internal/sm2ec/...
       env:
         GOARCH: ${{ matrix.arch }}      
diff --git a/internal/sm2ec/p256_asm_ppc64le.s b/internal/sm2ec/p256_asm_ppc64le.s
index 7327207..f29aa10 100644
--- a/internal/sm2ec/p256_asm_ppc64le.s
+++ b/internal/sm2ec/p256_asm_ppc64le.s
@@ -1,3 +1,9 @@
+// This is a port of the NIST P256 ppc64le asm implementation to SM2 P256.
+//
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 //go:build !purego
 
 #include "textflag.h"