diff --git a/test/rustint/core_test.clj b/test/rustint/core_test.clj
index 6e7732b..91ede10 100644
--- a/test/rustint/core_test.clj
+++ b/test/rustint/core_test.clj
@@ -416,7 +416,14 @@
   )
 )
 
-
+(deftest convertir-formato-impresion-14
+  (testing "Test 14 convertir-formato-impresion"
+    (is (=
+        (convertir-formato-impresion '("{}{}" 1 ""))
+        '("%d%s" 1 "")
+    ))
+  )
+)
 
 (deftest get-rust-formatters-01
   (testing "Test 01 get-rust-formatters"