diff --git a/test/rustint/core_test.clj b/test/rustint/core_test.clj
index 80bd96e..87a99ab 100644
--- a/test/rustint/core_test.clj
+++ b/test/rustint/core_test.clj
@@ -307,6 +307,16 @@
   )
 )
 
+(deftest convertir-formato-impresion-06
+  (testing "Test 06 convertir-formato-impresion"
+    (is (=
+         (convertir-formato-impresion '("Hola, mundo {} {} {}!" 2 2.0 "2"))
+         '("Hola, mundo %d %.0f %s!" 2 2.0 "2")
+        )
+    )
+  )
+)
+
 (deftest get-rust-formatters-01
   (testing "Test 01 get-rust-formatters"
     (is (=