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diff --git a/test/command/9090.md b/test/command/9090.md
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+++ b/test/command/9090.md
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+```
+% pandoc -f html -t gfm
+<table>
+  <tr>
+    <th>invalid head cell</td>
+  </tr>
+  <tr>
+    <td>body cell</td>
+  </tr>
+</table>
+^D
+| invalid head cell |
+|-------------------|
+| body cell         |
+```