diff --git a/tests/FSharp.Data.GraphQL.IntegrationTests/FSharp.Data.GraphQL.IntegrationTests.fsproj b/tests/FSharp.Data.GraphQL.IntegrationTests/FSharp.Data.GraphQL.IntegrationTests.fsproj
index 55c630c38..efa954b99 100644
--- a/tests/FSharp.Data.GraphQL.IntegrationTests/FSharp.Data.GraphQL.IntegrationTests.fsproj
+++ b/tests/FSharp.Data.GraphQL.IntegrationTests/FSharp.Data.GraphQL.IntegrationTests.fsproj
@@ -24,6 +24,7 @@
     <Compile Include="Helpers.fs" />
     <Compile Include="LocalProviderTests.fs" />
     <Compile Include="LocalProviderWithOptionalParametersOnlyTests.fs" />
+    <Compile Include="ResponseJsonTests.fs" />
     <Compile Include="SwapiLocalProviderTests.fs" />
     <Compile Include="SwapiRemoteProviderTests.fs" />
   </ItemGroup>
diff --git a/tests/FSharp.Data.GraphQL.IntegrationTests/ResponseJsonTests.fs b/tests/FSharp.Data.GraphQL.IntegrationTests/ResponseJsonTests.fs
new file mode 100644
index 000000000..04fe8fde7
--- /dev/null
+++ b/tests/FSharp.Data.GraphQL.IntegrationTests/ResponseJsonTests.fs
@@ -0,0 +1,73 @@
+module FSharp.Data.GraphQL.IntegrationTests.ResponseJsonTests
+
+open System
+open Xunit
+open Helpers
+open FSharp.Data.GraphQL
+open FSharp.Data.GraphQL.Client
+
+// Local provider should be able to be created from local introspection json file.
+// This schema is adjusted to have some less common type names in order to test them.
+type Provider = GraphQLProvider<"introspection.json">
+
+
+[<Fact>]
+let ``Should be able to parse nullable ID``() =
+    let op = Provider.Operation<"""query TestQuery {
+      hero(id:"1000") {
+          id,
+          name,
+          appearsIn,
+          homePlanet,
+          friends {
+            ... on Human {
+              name,
+              id
+            }
+            ... on Droid {
+              name,
+              id
+            }
+          }
+        }
+      }""">
+    let xop = op()
+    let result1 = xop.ParseResult("""{
+       "documentId": 2018203290,
+       "data": {
+         "hero": {
+          "id": "1000",
+          "__typename": "Human",
+          "name": "Luke Skywalker",
+          "appearsIn": [
+            "NewHope",
+            "Empire",
+            "Jedi"
+          ],
+          "homePlanet": "Tatooine",
+          "friends": [
+            {
+              "name": "Han Solo",
+              "id": "1002",
+              "__typename": "Human"
+            },
+            {
+              "name": "Leia Organa",
+              "id": "1003",
+              "__typename": "Human"
+            },
+            {
+              "name": "C-3PO",
+              "id": "2000",
+              "__typename": "Droid"
+            },
+            {
+              "name": "R2-D2",
+              "id": "2001",
+              "__typename": "Droid"
+            }
+          ]
+        }
+       }
+    }""")
+    ()
diff --git a/tests/FSharp.Data.GraphQL.IntegrationTests/introspection.json b/tests/FSharp.Data.GraphQL.IntegrationTests/introspection.json
index c3fe6fa10..b1803e0f8 100644
--- a/tests/FSharp.Data.GraphQL.IntegrationTests/introspection.json
+++ b/tests/FSharp.Data.GraphQL.IntegrationTests/introspection.json
@@ -971,7 +971,7 @@
                     "name": null,
                     "ofType": {
                       "kind": "SCALAR",
-                      "name": "String",
+                      "name": "ID",
                       "ofType": null
                     }
                   },
@@ -998,7 +998,7 @@
                     "name": null,
                     "ofType": {
                       "kind": "SCALAR",
-                      "name": "String",
+                      "name": "ID",
                       "ofType": null
                     }
                   },
@@ -1025,7 +1025,7 @@
                     "name": null,
                     "ofType": {
                       "kind": "SCALAR",
-                      "name": "String",
+                      "name": "ID",
                       "ofType": null
                     }
                   },
@@ -1174,7 +1174,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "String",
+                  "name": "ID",
                   "ofType": null
                 }
               },
@@ -1470,7 +1470,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "String",
+                  "name": "ID",
                   "ofType": null
                 }
               },
@@ -1521,7 +1521,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "String",
+                  "name": "ID",
                   "ofType": null
                 }
               },
@@ -1575,7 +1575,7 @@
                     "name": null,
                     "ofType": {
                       "kind": "SCALAR",
-                      "name": "String",
+                      "name": "ID",
                       "ofType": null
                     }
                   },
@@ -1617,7 +1617,7 @@
                     "name": null,
                     "ofType": {
                       "kind": "SCALAR",
-                      "name": "String",
+                      "name": "ID",
                       "ofType": null
                     }
                   },
@@ -1750,4 +1750,4 @@
       ]
     }
   }
-}
\ No newline at end of file
+}
diff --git a/tests/FSharp.Data.GraphQL.Tests/FSharp.Data.GraphQL.Tests.fsproj b/tests/FSharp.Data.GraphQL.Tests/FSharp.Data.GraphQL.Tests.fsproj
index f67afae82..63da81ea3 100644
--- a/tests/FSharp.Data.GraphQL.Tests/FSharp.Data.GraphQL.Tests.fsproj
+++ b/tests/FSharp.Data.GraphQL.Tests/FSharp.Data.GraphQL.Tests.fsproj
@@ -69,6 +69,7 @@
     <Compile Include="AspNetCore/TestSchema.fs" />
     <Compile Include="AspNetCore/InvalidMessageTests.fs" />
     <Compile Include="AspNetCore/SerializationTests.fs" />
+    <Compile Include="ResponseJsonTests.fs" />
     <Compile Include="Program.fs" />
   </ItemGroup>
 
@@ -81,6 +82,7 @@
     <ProjectReference Include="..\..\src\FSharp.Data.GraphQL.Shared\FSharp.Data.GraphQL.Shared.fsproj" />
     <ProjectReference Include="..\..\src\FSharp.Data.GraphQL.Server\FSharp.Data.GraphQL.Server.fsproj" />
     <ProjectReference Include="..\..\src\FSharp.Data.GraphQL.Server.AspNetCore\FSharp.Data.GraphQL.Server.AspNetCore.fsproj" />
+    <ProjectReference Include="..\..\src\FSharp.Data.GraphQL.Client.DesignTime\FSharp.Data.GraphQL.Client.DesignTime.fsproj" />
     <ProjectReference Include="..\..\src\FSharp.Data.GraphQL.Server.Middleware\FSharp.Data.GraphQL.Server.Middleware.fsproj" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>