diff --git a/test-positive/flowchart3.mmd b/test-positive/flowchart3.mmd
index bf29c5f0..43a80a4f 100644
--- a/test-positive/flowchart3.mmd
+++ b/test-positive/flowchart3.mmd
@@ -4,4 +4,4 @@ graph TD
     B-->D(fa:fa-spinner);
     B-->E(A fa:fa-camera-retro perhaps?);
     %% Test whether embed <img> work correctly
-    D-->F("<img height='100' width='100' src='data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22%3E%3Ccircle cx=%2250%22 cy=%2250%22 r=%2240%22 stroke=%22black%22 stroke-width=%223%22 fill=%22red%22 /%3E%3C/svg%3E'/> <br/> Red Circle")
+    D-->F("<img height='100' width='100' src='data:image/svg+xml,%3Csvg viewBox=%220 0 100 100%22 xmlns=%22http://www.w3.org/2000/svg%22%3E%3Ccircle cx=%2250%22 cy=%2250%22 r=%2240%22 stroke=%22black%22 stroke-width=%223%22 fill=%22red%22 /%3E%3C/svg%3E'/> <br/> Red Circle")