Index: Ringtoets/Migration/test/Ringtoets.Migration.Integration.Test/MigrationTo181IntegrationTest.cs
===================================================================
diff -u -rad66b6e2df465acc900aa792c99dfdacee3f3a32 -rf900d040576ffe6607e028aafc2912ba21c29b8c
--- Ringtoets/Migration/test/Ringtoets.Migration.Integration.Test/MigrationTo181IntegrationTest.cs	(.../MigrationTo181IntegrationTest.cs)	(revision ad66b6e2df465acc900aa792c99dfdacee3f3a32)
+++ Ringtoets/Migration/test/Ringtoets.Migration.Integration.Test/MigrationTo181IntegrationTest.cs	(.../MigrationTo181IntegrationTest.cs)	(revision f900d040576ffe6607e028aafc2912ba21c29b8c)
@@ -124,6 +124,8 @@
                     AssertWaterPressureAsphaltCoverSectionResultEntity(reader, sourceFilePath);
 
                     AssertWaveConditionsCalculations(reader, sourceFilePath);
+
+                    MigratedSerializedDataTestHelper.AssertSerializedMacroStabilityInwardsOutput(reader);
                 }
 
                 AssertLogDatabase(logFilePath);
@@ -766,6 +768,48 @@
             reader.AssertReturnedDataIsValid(validateMetaEntity);
         }
 
+        #region Serializers
+
+        /// <summary>
+        /// Testhelper to assert the migrated values of serialized data.
+        /// </summary>
+        private static class MigratedSerializedDataTestHelper
+        {
+            private const string oldNamespace = "Application.Ringtoets.Storage.Serializers";
+
+            /// <summary>
+            /// Asserts the migrated serialized data related to macro stability inwards output.
+            /// </summary>
+            /// <param name="reader">The reader to read the migrated database.</param>
+            /// <exception cref="AssertionException">Thrown when:
+            /// <list type="bullet">
+            /// <item>The namespace is still present.</item>
+            /// <item>The class name of the serialized data is still present.</item>
+            /// </list></exception>
+            public static void AssertSerializedMacroStabilityInwardsOutput(MigratedDatabaseReader reader)
+            {
+                string validateSlidingCurves =
+                    "SELECT " +
+                    "COUNT() = 0 " +
+                    "FROM MacroStabilityInwardsCalculationOutputEntity " +
+                    "WHERE LIKE('%MacroStabilityInwardsSliceXmlSerializer%', SlidingCurveSliceXml) " +
+                    $"OR LIKE('%{oldNamespace}%', SlidingCurveSliceXml)";
+
+                reader.AssertReturnedDataIsValid(validateSlidingCurves);
+
+                string validateTangentLines =
+                    "SELECT " +
+                    "COUNT() = 0 " +
+                    "FROM MacroStabilityInwardsCalculationOutputEntity " +
+                    "WHERE LIKE('%TangentLinesXmlSerializer%', SlipPlaneTangentLinesXml) " +
+                    $"OR LIKE('%{oldNamespace}%', SlipPlaneTangentLinesXml)";
+
+                reader.AssertReturnedDataIsValid(validateTangentLines);
+            }
+        }
+
+        #endregion
+
         #region Dune Locations
 
         /// <summary>