diff --git a/test/rustint/core_test.clj b/test/rustint/core_test.clj
index cdbae8c..c132f1f 100644
--- a/test/rustint/core_test.clj
+++ b/test/rustint/core_test.clj
@@ -347,6 +347,16 @@
   )
 )
 
+(deftest convertir-formato-impresion-10
+  (testing "Test 10 convertir-formato-impresion"
+    (is (=
+        (convertir-formato-impresion '("Las raices cuadradas de {} son +{:.8} y -{:.8}" 4.0 1.999999999985448 1.999999999985448))
+        '("Las raices cuadradas de %.0f son +%.8f y -%.8f" 4.0 1.999999999985448 1.999999999985448)
+        )
+    )
+  )
+)
+
 (deftest get-rust-formatters-01
   (testing "Test 01 get-rust-formatters"
     (is (=