diff --git a/test/lisp/net/tramp-tests.el b/test/lisp/net/tramp-tests.el
index 62f72a3f6f6..3d0ed499d54 100644
--- a/test/lisp/net/tramp-tests.el
+++ b/test/lisp/net/tramp-tests.el
@@ -2983,9 +2983,11 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
 	    (set-file-modes tmp-name3 #o444)
 	    (should-not
 	     (string-equal (file-acl tmp-name1) (file-acl tmp-name3)))
-	    ;; Copy ACL.
-	    (set-file-acl tmp-name3 (file-acl tmp-name1))
-	    (should (string-equal (file-acl tmp-name1) (file-acl tmp-name3)))
+	    ;; Copy ACL.  Since we don't know whether Emacs is built
+	    ;; with local ACL support, we must check it.
+	    (when (set-file-acl tmp-name3 (file-acl tmp-name1))
+               (file-acl tmp-name1) (file-acl tmp-name3))
+	      (should (string-equal (file-acl tmp-name1) (file-acl tmp-name3))))
 
 	    ;; Two files with same ACLs.
 	    (delete-file tmp-name1)