diff --git a/.github/workflows/basic-workflow.yml b/.github/workflows/basic-workflow.yml
index f85d0cd..92127bb 100644
--- a/.github/workflows/basic-workflow.yml
+++ b/.github/workflows/basic-workflow.yml
@@ -1,7 +1,9 @@
 name: Continuous integration example
 
-on: 
-  push:
+# ICÍAR
+on:
+  pull_request:
+    branches: [ main ]
 
 jobs:
 
diff --git a/src/main/java/es/codeurjc/test/ejem/Calculadora.java b/src/main/java/es/codeurjc/test/ejem/Calculadora.java
index cee74b0..2efe355 100644
--- a/src/main/java/es/codeurjc/test/ejem/Calculadora.java
+++ b/src/main/java/es/codeurjc/test/ejem/Calculadora.java
@@ -2,11 +2,12 @@
 
 public class Calculadora {
 
-	public double suma(double op1, double op2) {
-		return op1 + op2;
-	}
+    public double suma(double op1, double op2) {
+        return op1 + op2;
+    }
+
+    public double resta(double op1, double op2) {
+        return op1 - op2;
+    }
 
-	public double resta(double op1, double op2) {
-		return op1 - op2;
-	}
 }