This test seems to expect interactive input, therefore disable.

--- a/tests/markdown-test.el
+++ b/tests/markdown-test.el
@@ -7102,7 +7102,7 @@ Detail: https://github.com/jrblevin/markdown-mode/pull/590"
             (should (string= (markdown-wiki-link-link) "Zettel Markdown")))
         (kill-buffer)))))
 
-(ert-deftest test-markdown-ext/wiki-link-search-under-project ()
+(defun --test-markdown-ext/wiki-link-search-under-project ()
   "Test that searching link under project root."
   (let ((markdown-enable-wiki-links t)
         (markdown-link-space-sub-char " ")