Tests: TODO js_return.t fail seen with older njs on some platforms.

js_return.t

diff --git a/js_return.t b/js_return.t
index 725c881..bf3d7ee 100644
--- a/js_return.t
+++ b/js_return.t
@@ -12,6 +12,8 @@
 
 use Test::More;
 
+use Config;
+
 BEGIN { use FindBin; chdir($FindBin::Bin); }
 
 use lib 'lib';
@@ -41,6 +43,10 @@
         listen       127.0.0.1:8080;
         server_name  localhost;
 
+        location /njs {
+            js_content test_njs;
+        }
+
         location / {
             js_content test_return;
         }
@@ -50,8 +56,11 @@
 EOF
 
 $t->write_file('test.js', <<EOF);
+    function test_njs(req, res) {
+        res.return(200, njs.version);
+    }
+
     function test_return(req, res) {
-        njs.version;
         res.return(Number(req.args.c), req.args.t);
     }
 
@@ -65,6 +74,13 @@
 like(http_get('/?c=200&t=SEE-THIS'), qr/200 OK.*^SEE-THIS$/ms, 'return text');
 like(http_get('/?c=301&t=path'), qr/ 301 .*Location: path/s, 'return redirect');
 like(http_get('/?c=404'), qr/404 Not.*html/s, 'return error page');
+
+TODO: {
+my ($v) = http_get('/njs') =~ /^([.0-9]+)$/m;
+local $TODO = 'not yet' unless $v ge '0.2.1' or $Config{archname} !~ /aarch64/;
+
 like(http_get('/?c=inv'), qr/ 500 /, 'return invalid');
 
+}
+
 ###############################################################################