diff --git a/test/tramp-tests.el b/test/tramp-tests.el
index ee9c09df..c2ff3388 100644
--- a/test/tramp-tests.el
+++ b/test/tramp-tests.el
@@ -7181,6 +7181,7 @@ This requires restrictions of file name syntax."

 (defun tramp--test-check-files (&rest files)
   "Run a simple but comprehensive test over every file in FILES."
+  (tramp--test-instrument-test-case 10
   (dolist (quoted (if (tramp--test-expensive-test-p) '(nil t) '(nil)))
     ;; We must use `file-truename' for the temporary directory,
     ;; because it could be located on a symlinked directory.  This
@@ -7383,7 +7384,7 @@ This requires restrictions of file name syntax."
 	;; Cleanup.
 	(ignore-errors (kill-buffer buffer))
 	(ignore-errors (delete-directory tmp-name1 'recursive))
-	(ignore-errors (delete-directory tmp-name2 'recursive))))))
+	(ignore-errors (delete-directory tmp-name2 'recursive)))))))

 ;; These tests are inspired by Bug#17238.
 (ert-deftest tramp-test41-special-characters ()