diff --git a/test/qr.groovy b/test/qr.groovy
index 20b5a79..25dfdb3 100644
--- a/test/qr.groovy
+++ b/test/qr.groovy
@@ -1,7 +1,7 @@
 #!/usr/bin/env groovy
-import com.google.zxing.BarcodeFormat
-import com.google.zxing.qrcode.QRCodeWriter
-
-def w = new QRCodeWriter()
-def m = w.encode("unsandbox-qr-ok", BarcodeFormat.QR_CODE, 0, 0)
-println "QR:unsandbox-qr-ok:ROWS:${m.height}"
+// Use qrencode CLI via ProcessBuilder (libqrencode wrapper)
+def proc = ["qrencode", "-t", "UTF8", "-m", "0", "unsandbox-qr-ok"].execute()
+def output = proc.text
+proc.waitFor()
+def rows = output.split('\n').findAll { it.trim() }.size()
+println "QR:unsandbox-qr-ok:ROWS:${rows}"