diff --git a/yasnippet-tests.el b/yasnippet-tests.el
index e009a72..b8a7980 100644
--- a/yasnippet-tests.el
+++ b/yasnippet-tests.el
@@ -847,7 +847,7 @@ mapconcat #'(lambda (arg)
   ;; See https://github.com/joaotavora/yasnippet/issues/800.
   (with-temp-buffer
     (yas-minor-mode 1)
-    (should-error (yas-expand-snippet "```foo\n\n```"))
+    (yas-expand-snippet "```foo\n\n```")
     (erase-buffer) ; Bad snippet may leave wrong text.
     ;; But expanding the corrected snippet should work fine.
     (yas-expand-snippet "\\`\\`\\`foo\n\n\\`\\`\\`")
diff --git a/yasnippet.el b/yasnippet.el
index fe29fc9..78ef38a 100644
--- a/yasnippet.el
+++ b/yasnippet.el
@@ -1505,7 +1505,7 @@ Also tries to work around Emacs Bug#30931."
               (let ((result (eval form)))
                 (when result
                   (format "%s" result))))))
-      ((debug error) (cdr oops)))))
+      ((debug error) (error-message-string oops)))))
 
 (defun yas--eval-for-effect (form)
   (yas--safely-call-fun (apply-partially #'eval form)))