diff --git a/tests/FinancialUtils.Tests/CalculatorTests.cs b/tests/FinancialUtils.Tests/CalculatorTests.cs
index 6bab0b2..97dfa17 100644
--- a/tests/FinancialUtils.Tests/CalculatorTests.cs
+++ b/tests/FinancialUtils.Tests/CalculatorTests.cs
@@ -148,10 +148,10 @@ public void LoanPayment_InvalidMonths_ThrowsArgumentException(int months)
     public void NetPresentValue_CalculatesCorrectly()
     {
         // Inversión inicial -1000, flujos futuros de 400 por 3 periodos a tasa 10%
-        // NPV = -1000 + 400/1.1 + 400/1.21 + 400/1.331 ≈ -0.64
+        // NPV = -1000 + 400/1.1 + 400/1.21 + 400/1.331 ≈ -5.26
         var cashFlows = new[] { -1000m, 400m, 400m, 400m };
         var result = Calculator.NetPresentValue(0.10m, cashFlows);
-        Assert.Equal(-0.64m, result);
+        Assert.Equal(-5.26m, result);
     }
 
     [Fact]