diff --git a/sdk/test/Services/DynamoDBv2/UnitTests/Custom/DocumentJsonTests.cs b/sdk/test/Services/DynamoDBv2/UnitTests/Custom/DocumentJsonTests.cs
index ec24f3f5d434..50988cd5c10c 100644
--- a/sdk/test/Services/DynamoDBv2/UnitTests/Custom/DocumentJsonTests.cs
+++ b/sdk/test/Services/DynamoDBv2/UnitTests/Custom/DocumentJsonTests.cs
@@ -149,13 +149,14 @@ public void FromJson_Long()
         [TestMethod]
         public void ToJson_Long()
         {
+            var longValue = long.MaxValue - 100;
             var document = new Document();
-            document["key"] = 9223372036854775806L;
+            document["key"] = longValue;
 
             var json = document.ToJsonPretty();
 
             var expectedJson = $@"{{
-  ""key"": 9223372036854775806
+  ""key"": {longValue}
 }}";
 
             Assert.AreEqual(expectedJson, json);