diff --git a/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/WebServiceDataSourceItemFixture.cs b/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/WebServiceDataSourceItemFixture.cs
index 13388c6..3c1a62f 100644
--- a/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/WebServiceDataSourceItemFixture.cs
+++ b/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/WebServiceDataSourceItemFixture.cs
@@ -58,77 +58,99 @@ public void RDashDocument_HasCorrectDataSource_WhenLoadFromFile()
             Assert.NotNull(webServiceDataSource.Properties.GetValue<string>("_rpUseAnonymousAuthentication"));
         }
 
-        //[Fact]
-        //public void ToJsonString_CreatesFormattedJson_ForWebServiceDataSource()
-        //{
-        //    // Arrange
-        //    var expectedJson =
-        //        """
-        //        {
-        //          "_type": "DataSourceItemType",
-        //          "Id": "webServiceItemId",
-        //          "Title": "Sales by Category",
-        //          "Subtitle": "Excel2Json",
-        //          "DataSourceId": "__JSON",
-        //          "HasTabularData": true,
-        //          "HasAsset": false,
-        //          "Properties": {},
-        //          "Parameters": {},
-        //          "ResourceItem": {
-        //            "_type": "DataSourceItemType",
-        //            "Id": "webServiceItemId",
-        //            "Title": "DB Test",
-        //            "Subtitle": "Excel2Json",
-        //            "DataSourceId": "JSON",
-        //            "HasTabularData": true,
-        //            "HasAsset": false,
-        //            "Properties": {
-        //              "Url": "https://excel2json.io/api/share/6e0f06b3-72d3-4fec-7984-08da43f56bb9"
-        //            },
-        //            "Parameters": {}
-        //          }
-        //        }
-        //        """;
+        [Fact]
+        public void ToJsonString_CreatesFormattedJson_ForWebServiceDataSource()
+        {
+            // Arrange
+            var expectedJson =
+                """
+                {
+                  "_type": "DataSourceItemType",
+                  "Id": "webServiceItemId",
+                  "Title": "Sales by Category",
+                  "Subtitle": "Excel2Json",
+                  "DataSourceId": "__JSON",
+                  "HasTabularData": true,
+                  "HasAsset": false,
+                  "Properties": {},
+                  "Parameters": {
+                    "config": {
+                      "iterationDepth": 0,
+                      "columnsConfig": [
+                        {
+                          "key": "CategoryID",
+                          "type": 1
+                        },
+                        {
+                          "key": "CategoryName",
+                          "type": 0
+                        },
+                        {
+                          "key": "ProductName",
+                          "type": 0
+                        },
+                        {
+                          "key": "ProductSales",
+                          "type": 1
+                        }
+                      ]
+                    }
+                  },
+                  "ResourceItem": {
+                    "_type": "DataSourceItemType",
+                    "Id": "webServiceItemId",
+                    "Title": "DB Test",
+                    "Subtitle": "Excel2Json",
+                    "DataSourceId": "JSON",
+                    "HasTabularData": true,
+                    "HasAsset": false,
+                    "Properties": {
+                      "Url": "https://excel2json.io/api/share/6e0f06b3-72d3-4fec-7984-08da43f56bb9"
+                    },
+                    "Parameters": {}
+                  }
+                }
+                """;
 
-        //    var dataSource = new DataSource()
-        //    {
-        //        Id = "JSON",
-        //        Title = "JSON Data Source",
-        //        Subtitle = "JSON Data Source Subtitle",
-        //    };
+            var dataSource = new DataSource()
+            {
+                Id = "JSON",
+                Title = "JSON Data Source",
+                Subtitle = "JSON Data Source Subtitle",
+            };
 
-        //    var dataSourceItems = new WebServiceDataSourceItem("DB Test", dataSource)
-        //    {
-        //        Id = "webServiceItemId",
-        //        Title = "Sales by Category",
-        //        Subtitle = "Excel2Json",
-        //        Uri = "https://excel2json.io/api/share/6e0f06b3-72d3-4fec-7984-08da43f56bb9",
-        //        Fields = new List<IField>
-        //        {
-        //            new NumberField("CategoryID"),
-        //            new TextField("CategoryName"),
-        //            new TextField("ProductName"),
-        //            new NumberField("ProductSales"),
-        //        }
-        //    };
+            var dataSourceItems = new WebServiceDataSourceItem("DB Test", dataSource)
+            {
+                Id = "webServiceItemId",
+                Title = "Sales by Category",
+                Subtitle = "Excel2Json",
+                Uri = "https://excel2json.io/api/share/6e0f06b3-72d3-4fec-7984-08da43f56bb9",
+                Fields = new List<IField>
+                {
+                    new NumberField("CategoryID"),
+                    new TextField("CategoryName"),
+                    new TextField("ProductName"),
+                    new NumberField("ProductSales"),
+                }
+            };
 
-        //    var document = new RdashDocument("My Dashboard");
-        //    document.Visualizations.Add(
-        //        new ColumnChartVisualization("Test List", dataSourceItems)
-        //            .SetLabel("CategoryName")
-        //            .SetValue("ProductName")
-        //            );
+            var document = new RdashDocument("My Dashboard");
+            document.Visualizations.Add(
+                new ColumnChartVisualization("Test List", dataSourceItems)
+                    .SetLabel("CategoryName")
+                    .SetValue("ProductName")
+                    );
 
-        //    var expectedJObject = JObject.Parse(expectedJson);
+            var expectedJObject = JObject.Parse(expectedJson);
 
-        //    // Act
-        //    RdashSerializer.SerializeObject(document);
-        //    var json = document.ToJsonString();
-        //    var jObject = JObject.Parse(json);
-        //    var actualJObject = jObject["Widgets"].FirstOrDefault()["DataSpec"]["DataSourceItem"];
+            // Act
+            RdashSerializer.SerializeObject(document);
+            var json = document.ToJsonString();
+            var jObject = JObject.Parse(json);
+            var actualJObject = jObject["Widgets"].FirstOrDefault()["DataSpec"]["DataSourceItem"];
 
-        //    // Assert
-        //    Assert.Equal(expectedJObject, actualJObject);
-        //}
+            // Assert
+            Assert.Equal(expectedJObject, actualJObject);
+        }
     }
 }
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