Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/PipingCalculationTest.cs
===================================================================
diff -u -rc76403f10e7eaa78da898922b3955851786b855f -r0a94ed42cb943659d68be2ce6fb430f8f29fc3f3
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/PipingCalculationTest.cs	(.../PipingCalculationTest.cs)	(revision c76403f10e7eaa78da898922b3955851786b855f)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/PipingCalculationTest.cs	(.../PipingCalculationTest.cs)	(revision 0a94ed42cb943659d68be2ce6fb430f8f29fc3f3)
@@ -264,7 +264,24 @@
             ICalculationInput input = calculation.GetObservableInput();
 
             // Assert
-            Assert.AreEqual(inputParameters, input);
+            Assert.AreSame(inputParameters, input);
         }
+
+        [Test]
+        public void GetObservalbeOutput_Always_ReturnsOutput()
+        {
+            // Setup
+            var output = new PipingOutput(2.0, 3.0, 1.4, 50.3, 16.3, 58.2);
+            var calculation = new PipingCalculation(new GeneralPipingInput(), new NormProbabilityPipingInput())
+            {
+                Output = output
+            };
+
+            // Call
+            ICalculationOutput calculationOutput = calculation.GetObservableOutput();
+
+            // Assert
+            Assert.AreSame(output, calculationOutput);
+        }
     }
 }
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