diff --git a/src/test/java/com/mandacarubroker/MandacarubrokerApplicationTests.java b/src/test/java/com/mandacarubroker/MandacarubrokerApplicationTests.java
index 3f1e3e2..104ff5f 100644
--- a/src/test/java/com/mandacarubroker/MandacarubrokerApplicationTests.java
+++ b/src/test/java/com/mandacarubroker/MandacarubrokerApplicationTests.java
@@ -79,4 +79,14 @@ void testCreateValidRequestStockDTO() {
 		Assertions.assertEquals(price, requestStockDTO.price(), 0.001, "Price should match");
 	}
 
-}
\ No newline at end of file
+	@Test
+    	void testCreateRequestStockDTOWithInvalidSymbol() {
+        	// Arrange
+        	String invalidSymbol = "A";  // Símbolo contendo menos de 3 caracteres
+
+        	// Act & Assert
+        	Assertions.assertThrows(IllegalArgumentException.class, () -> {
+            	new RequestStockDTO(invalidSymbol, "Company XYZ", 50.0);
+        	});
+    	}
+}