diff --git a/tests/testthat/testMarkdownVignettes/DESCRIPTION b/tests/testthat/testMarkdownVignettes/DESCRIPTION
index 80c9149b3..4bb752c7b 100644
--- a/tests/testthat/testMarkdownVignettes/DESCRIPTION
+++ b/tests/testthat/testMarkdownVignettes/DESCRIPTION
@@ -6,4 +6,4 @@ Author: Hadley <h.wickham@gmail.com>
 Maintainer: Hadley <h.wickham@gmail.com>
 Version: 0.1
 VignetteBuilder: knitr
-Suggests: knitr
+Suggests: knitr, rmarkdown
diff --git a/tests/testthat/testMarkdownVignettes/vignettes/test.Rmd b/tests/testthat/testMarkdownVignettes/vignettes/test.Rmd
index 736705151..fd5451dc6 100644
--- a/tests/testthat/testMarkdownVignettes/vignettes/test.Rmd
+++ b/tests/testthat/testMarkdownVignettes/vignettes/test.Rmd
@@ -1,6 +1,9 @@
 <!--
-%\VignetteEngine{knitr}
-%\VignetteIndexEntry{Test vignette}
+title: "Test"
+vignette: >
+  %\VignetteIndexEntry{Test}
+  %\VignetteEngine{knitr::rmarkdown}
+  %\VignetteEncoding{UTF-8}
 -->
 
 This is a test.