diff --git a/test/e2e/image.js b/test/e2e/image.js
index cecdc5598e827d..b3c81f5d20e6cc 100644
--- a/test/e2e/image.js
+++ b/test/e2e/image.js
@@ -171,7 +171,7 @@ class Image {
 
 		} else {
 
-			buffer = input;
+			buffer = Buffer.isBuffer( input ) ? input : Buffer.from( input );
 
 		}