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+<!DOCTYPE html>
+<html>
+ <head>
+  <title>CSS Reference: flex-direction:row has the same orientation as inline axis</title>
+  <style>
+    #vertical {
+      writing-mode: vertical-lr;
+    }
+
+    .test {
+      display: flex;
+      width: 3em;
+      flex-direction: row;
+    }
+
+    .test > span {
+      width: 1em;
+    }
+  </style>
+ </head>
+ <body>
+  <p>Test passes if both the two columns below are identical.</p>
+  <div id="vertical">
+    <div class="test">
+      <span>A</span><span>B</span><span>C</span>
+    </div>
+    <div class="test">
+      <span>A</span><span>B</span><span>C</span>
+    </div>
+  </div>
+ </body>
+</html>