diff --git a/stellar-dotnet-sdk-test/responses/EffectDeserializerTest.cs b/stellar-dotnet-sdk-test/responses/EffectDeserializerTest.cs
index f2d186ef4..8ad9925a2 100644
--- a/stellar-dotnet-sdk-test/responses/EffectDeserializerTest.cs
+++ b/stellar-dotnet-sdk-test/responses/EffectDeserializerTest.cs
@@ -933,7 +933,7 @@ private static void AssertAccountSponsorshipCreatedData(EffectResponse instance)
             Assert.IsTrue(instance is AccountSponsorshipCreatedEffectResponse);
             var effect = (AccountSponsorshipCreatedEffectResponse)instance;
 
-            Assert.AreEqual("GDPFGP4IPE5DXG6XRXC4ZBUI43PAGRQ5VVNJ3LJTBXDBZ4ITO6HBHNSF", effect.Sponsor);
+            Assert.AreEqual("GCBQ6JRBPF3SXQBQ6SO5MRBE7WVV4UCHYOSHQGXSZNPZLFRYVYOWBZRQ", effect.Sponsor);
         }
 
         //Account Sponsorship Removed
@@ -953,7 +953,7 @@ private static void AssertAccountSponsorshipRemovedData(EffectResponse instance)
             Assert.IsTrue(instance is AccountSponsorshipRemovedEffectResponse);
             var effect = (AccountSponsorshipRemovedEffectResponse)instance;
 
-            Assert.AreEqual("GDPFGP4IPE5DXG6XRXC4ZBUI43PAGRQ5VVNJ3LJTBXDBZ4ITO6HBHNSF", effect.FormerSponsor);
+            Assert.AreEqual("GCBQ6JRBPF3SXQBQ6SO5MRBE7WVV4UCHYOSHQGXSZNPZLFRYVYOWBZRQ", effect.FormerSponsor);
         }
 
 
@@ -974,8 +974,8 @@ private static void AssertAccountSponsorshipUpdatedData(EffectResponse instance)
             Assert.IsTrue(instance is AccountSponsorshipUpdatedEffectResponse);
             var effect = (AccountSponsorshipUpdatedEffectResponse)instance;
 
-            Assert.AreEqual("GDPFGP4IPE5DXG6XRXC4ZBUI43PAGRQ5VVNJ3LJTBXDBZ4ITO6HBHNSF", effect.FormerSponsor);
-            Assert.AreEqual("GDPFGP4IPE5DXG6XRXC4ZBUI43PAGRQ5VVNJ3LJTBXDBZ4ITO6HBHNSF", effect.NewSponsor);
+            Assert.AreEqual("GCBQ6JRBPF3SXQBQ6SO5MRBE7WVV4UCHYOSHQGXSZNPZLFRYVYOWBZRQ", effect.FormerSponsor);
+            Assert.AreEqual("GBVFLWXYCIGPO3455XVFIKHS66FCT5AI64ZARKS7QJN4NF7K5FOXTJNL", effect.NewSponsor);
         }
     }
 }
diff --git a/stellar-dotnet-sdk-test/stellar-dotnet-sdk-test.csproj b/stellar-dotnet-sdk-test/stellar-dotnet-sdk-test.csproj
index 42549e490..0ef74f7f7 100644
--- a/stellar-dotnet-sdk-test/stellar-dotnet-sdk-test.csproj
+++ b/stellar-dotnet-sdk-test/stellar-dotnet-sdk-test.csproj
@@ -44,6 +44,15 @@
     <None Update="testdata\assetPage.json">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
+    <None Update="testdata\effects\effectAccountSponsorshipRemoved.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="testdata\effects\effectAccountSponsorshipUpdated.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="testdata\effects\effectAccountSponsorshipCreated.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
     <None Update="testdata\effects\effectAccountInflationUpdated.json">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
diff --git a/stellar-dotnet-sdk-test/testdata/effects/effectAccountSponsorshipCreated.json b/stellar-dotnet-sdk-test/testdata/effects/effectAccountSponsorshipCreated.json
new file mode 100644
index 000000000..389d535de
--- /dev/null
+++ b/stellar-dotnet-sdk-test/testdata/effects/effectAccountSponsorshipCreated.json
@@ -0,0 +1,18 @@
+{
+  "_links": {
+    "operation": {
+      "href": "http://horizon-testnet.stellar.org/operations/65571265847297"
+    },
+    "succeeds": {
+      "href": "http://horizon-testnet.stellar.org/effects?order=desc&cursor=65571265847297-1"
+    },
+    "precedes": {
+      "href": "http://horizon-testnet.stellar.org/effects?order=asc&cursor=65571265847297-1"
+    }
+  },
+  "id": "0000065571265847297-0000000001",
+  "paging_token": "65571265847297-1",
+  "sponsor": "GCBQ6JRBPF3SXQBQ6SO5MRBE7WVV4UCHYOSHQGXSZNPZLFRYVYOWBZRQ",
+  "type": "account_sponsorship_created",
+  "type_i": 60
+}
diff --git a/stellar-dotnet-sdk-test/testdata/effects/effectAccountSponsorshipRemoved.json b/stellar-dotnet-sdk-test/testdata/effects/effectAccountSponsorshipRemoved.json
new file mode 100644
index 000000000..13307fe61
--- /dev/null
+++ b/stellar-dotnet-sdk-test/testdata/effects/effectAccountSponsorshipRemoved.json
@@ -0,0 +1,18 @@
+{
+  "_links": {
+    "operation": {
+      "href": "http://horizon-testnet.stellar.org/operations/65571265847297"
+    },
+    "succeeds": {
+      "href": "http://horizon-testnet.stellar.org/effects?order=desc&cursor=65571265847297-1"
+    },
+    "precedes": {
+      "href": "http://horizon-testnet.stellar.org/effects?order=asc&cursor=65571265847297-1"
+    }
+  },
+  "id": "0000065571265847297-0000000001",
+  "paging_token": "65571265847297-1",
+  "former_sponsor": "GCBQ6JRBPF3SXQBQ6SO5MRBE7WVV4UCHYOSHQGXSZNPZLFRYVYOWBZRQ",
+  "type": "account_sponsorship_removed",
+  "type_i": 62
+}
diff --git a/stellar-dotnet-sdk-test/testdata/effects/effectAccountSponsorshipUpdated.json b/stellar-dotnet-sdk-test/testdata/effects/effectAccountSponsorshipUpdated.json
new file mode 100644
index 000000000..52e7ebb97
--- /dev/null
+++ b/stellar-dotnet-sdk-test/testdata/effects/effectAccountSponsorshipUpdated.json
@@ -0,0 +1,19 @@
+{
+  "_links": {
+    "operation": {
+      "href": "http://horizon-testnet.stellar.org/operations/65571265847297"
+    },
+    "succeeds": {
+      "href": "http://horizon-testnet.stellar.org/effects?order=desc&cursor=65571265847297-1"
+    },
+    "precedes": {
+      "href": "http://horizon-testnet.stellar.org/effects?order=asc&cursor=65571265847297-1"
+    }
+  },
+  "id": "0000065571265847297-0000000001",
+  "paging_token": "65571265847297-1",
+  "former_sponsor": "GCBQ6JRBPF3SXQBQ6SO5MRBE7WVV4UCHYOSHQGXSZNPZLFRYVYOWBZRQ",
+  "new_sponsor": "GBVFLWXYCIGPO3455XVFIKHS66FCT5AI64ZARKS7QJN4NF7K5FOXTJNL",
+  "type": "account_sponsorship_updated",
+  "type_i": 61
+}