diff --git a/pkgs/dotnet-server-sdk-dynamodb/test/DynamoDBBigSegmentStoreTest.cs b/pkgs/dotnet-server-sdk-dynamodb/test/DynamoDBBigSegmentStoreTest.cs
index d322c651..cd7b595a 100644
--- a/pkgs/dotnet-server-sdk-dynamodb/test/DynamoDBBigSegmentStoreTest.cs
+++ b/pkgs/dotnet-server-sdk-dynamodb/test/DynamoDBBigSegmentStoreTest.cs
@@ -11,6 +11,7 @@
 
 namespace LaunchDarkly.Sdk.Server.Integrations
 {
+    [Collection("DynamoDB Tests")]
     public class DynamoDBBigSegmentStoreTest : BigSegmentStoreBaseTests, IAsyncLifetime
     {
         override protected BigSegmentStoreTestConfig Configuration => new BigSegmentStoreTestConfig
diff --git a/pkgs/dotnet-server-sdk-dynamodb/test/DynamoDBDataStoreTest.cs b/pkgs/dotnet-server-sdk-dynamodb/test/DynamoDBDataStoreTest.cs
index 4e576be8..9d68eb9c 100644
--- a/pkgs/dotnet-server-sdk-dynamodb/test/DynamoDBDataStoreTest.cs
+++ b/pkgs/dotnet-server-sdk-dynamodb/test/DynamoDBDataStoreTest.cs
@@ -13,6 +13,7 @@
 
 namespace LaunchDarkly.Sdk.Server.Integrations
 {
+    [Collection("DynamoDB Tests")]
     public class DynamoDBDataStoreTest : PersistentDataStoreBaseTests, IAsyncLifetime
     {
         const string BadItemKey = "baditem";