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diff --git a/test/test-gptel-org.el b/test/test-gptel-org.el
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+;; -*- lexical-binding: t; -*-
+(require 'ert)
+(require 'gptel)
+
+(let ((string-sequence
+       '("" "```" "cpp" "
+" "#include" " <" "cstdio" ">
+
+" "int" " main" "()" " {
+" "   " " printf" "(\"" "``" "``" "`" "\n" "\");
+" "   " " return" " " "0" ";
+" "}
+" "```"))
+      (converted-sequence
+       "#+begin_src cpp
+#include <cstdio>
+
+int main() {
+    printf(\"`````\n\");
+    return 0;
+}
+#+end_src"))
+  (ert-deftest test--gptel--convert-markdown->org ()
+    (should (string= (gptel--convert-markdown->org (apply #'concat string-sequence))
+                     converted-sequence)))
+
+  (ert-deftest test--gptel--stream-convert-markdown->org ()
+    (let ((func (gptel--stream-convert-markdown->org)))
+      (should
+       (string= (apply #'concat (mapcar func string-sequence))
+                converted-sequence)))))
+