diff --git a/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2.Tests/BigQueryClientImplTest.cs b/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2.Tests/BigQueryClientImplTest.cs
index 1e2a476e6f17..8fe525029105 100644
--- a/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2.Tests/BigQueryClientImplTest.cs
+++ b/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2.Tests/BigQueryClientImplTest.cs
@@ -328,7 +328,7 @@ public void ExecuteStatelessQuery()
             var service = new FakeBigqueryService();
             var client = new BigQueryClientImpl("project", service);
             var sql = "SELECT * FROM dataset.table";
-            var request = new QueryRequest { Query = sql, UseLegacySql = false, MaxResults = 10, Location = "us" };
+            var request = new QueryRequest { Query = sql, UseLegacySql = false, MaxResults = 10, Location = "us", FormatOptions = new DataFormatOptions { UseInt64Timestamp = true } };
             service.ExpectRequest(service.Jobs.Query(request, "project"), CreateStatelessResponse("value"));
 
             var results = client.ExecuteStatelessQuery(sql, parameters: null, queryOptions: new StatelessQueryOptions { MaxResults = 10, Location = "us" });
@@ -341,7 +341,7 @@ public async Task ExecuteStatelessQueryAsync()
             var service = new FakeBigqueryService();
             var client = new BigQueryClientImpl("project", service);
             var sql = "SELECT * FROM dataset.table";
-            var request = new QueryRequest { Query = sql, UseLegacySql = false, MaxResults = 10, Location = "us" };
+            var request = new QueryRequest { Query = sql, UseLegacySql = false, MaxResults = 10, Location = "us", FormatOptions = new DataFormatOptions { UseInt64Timestamp = true } };
             service.ExpectRequest(service.Jobs.Query(request, "project"), CreateStatelessResponse("value"));
 
             var results = await client.ExecuteStatelessQueryAsync(sql, parameters: null, queryOptions: new StatelessQueryOptions { MaxResults = 10, Location = "us" });
@@ -355,7 +355,7 @@ public void ExecuteStatelessQuery_WithParameters()
             var client = new BigQueryClientImpl("project", service);
             var sql = "SELECT * FROM dataset.table WHERE col = @val";
             var parameters = new[] { new BigQueryParameter("val", BigQueryDbType.String, "foo") };
-            var request = new QueryRequest { Query = sql, UseLegacySql = false, ParameterMode = "named", QueryParameters = new[] { parameters[0].ToQueryParameter() } };
+            var request = new QueryRequest { Query = sql, UseLegacySql = false, ParameterMode = "named", QueryParameters = new[] { parameters[0].ToQueryParameter() }, FormatOptions = new DataFormatOptions { UseInt64Timestamp = true } };
             service.ExpectRequest(service.Jobs.Query(request, "project"), CreateStatelessResponse("foo"));
 
             var results = client.ExecuteStatelessQuery(sql, parameters);
@@ -394,7 +394,7 @@ public void ExecuteQuery_StatelessOptimization()
             var queryOptions = new QueryOptions { UseQueryCache = true };
             var resultsOptions = new GetQueryResultsOptions { PageSize = 10 };
             
-            var request = new QueryRequest { Query = sql, UseLegacySql = false, UseQueryCache = true, MaxResults = 10 };
+            var request = new QueryRequest { Query = sql, UseLegacySql = false, UseQueryCache = true, MaxResults = 10, FormatOptions = new DataFormatOptions { UseInt64Timestamp = true } };
             service.ExpectRequest(service.Jobs.Query(request, "project"), CreateStatelessResponse("value"));
 
             var results = client.ExecuteQuery(sql, parameters: null, queryOptions: queryOptions, resultsOptions: resultsOptions);
@@ -412,7 +412,7 @@ public async Task ExecuteQueryAsync_StatelessOptimization()
             var queryOptions = new QueryOptions { UseQueryCache = true };
             var resultsOptions = new GetQueryResultsOptions { PageSize = 10 };
             
-            var request = new QueryRequest { Query = sql, UseLegacySql = false, UseQueryCache = true, MaxResults = 10 };
+            var request = new QueryRequest { Query = sql, UseLegacySql = false, UseQueryCache = true, MaxResults = 10, FormatOptions = new DataFormatOptions { UseInt64Timestamp = true } };
             service.ExpectRequest(service.Jobs.Query(request, "project"), CreateStatelessResponse("value"));
 
             var results = await client.ExecuteQueryAsync(sql, parameters: null, queryOptions: queryOptions, resultsOptions: resultsOptions);
diff --git a/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2/BigQueryClientImpl.Queries.cs b/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2/BigQueryClientImpl.Queries.cs
index d3534e486a1b..d635e43d0542 100644
--- a/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2/BigQueryClientImpl.Queries.cs
+++ b/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2/BigQueryClientImpl.Queries.cs
@@ -240,7 +240,8 @@ private QueryRequest CreateQueryRequest(string sql, IEnumerable<BigQueryParamete
                 ParameterMode = "named",
                 QueryParameters = parameters?.Select(p => p.ToQueryParameter()).ToList(),
             };
-            options?.ModifyRequest(request);
+            // If no options are provided, we create an empty query options and propagate any defaults to the request
+            (options ?? new StatelessQueryOptions()).ModifyRequest(request);
             request.Location ??= DefaultLocation;
             // If there aren't any parameters, set ParameterMode to null - otherwise legacy SQL queries fail,
             // even if haven't set any parameters.
diff --git a/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2/GetQueryResultsOptions.cs b/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2/GetQueryResultsOptions.cs
index 6ca0fceb54c2..a2c1dd39f1cf 100644
--- a/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2/GetQueryResultsOptions.cs
+++ b/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2/GetQueryResultsOptions.cs
@@ -95,7 +95,8 @@ private void ModifyRequest(GetQueryResultsRequest request)
             PageSize = PageSize,
             PageToken = PageToken,
             StartIndex = StartIndex,
-            Timeout = Timeout
+            Timeout = Timeout,
+            UseInt64Timestamp = UseInt64Timestamp
         };
 
     }
diff --git a/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2/StatelessQueryOptions.cs b/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2/StatelessQueryOptions.cs
index 76b882af4242..561e2186e5e7 100644
--- a/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2/StatelessQueryOptions.cs
+++ b/apis/Google.Cloud.BigQuery.V2/Google.Cloud.BigQuery.V2/StatelessQueryOptions.cs
@@ -61,7 +61,7 @@ internal sealed class StatelessQueryOptions
     /// <summary>
     /// Optional output format adjustments.
     /// </summary>
-    internal DataFormatOptions FormatOptions { get; set; }
+    internal DataFormatOptions FormatOptions { get; set; } = new DataFormatOptions {UseInt64Timestamp = true};
 
     /// <summary>
     /// Specifies whether a job is required to be created.
diff --git a/apis/Google.Cloud.Datastore.V1/Google.Cloud.Datastore.V1.IntegrationTests/DatastoreFixture.cs b/apis/Google.Cloud.Datastore.V1/Google.Cloud.Datastore.V1.IntegrationTests/DatastoreFixture.cs
index 298a0da585ba..769a765eb2b3 100644
--- a/apis/Google.Cloud.Datastore.V1/Google.Cloud.Datastore.V1.IntegrationTests/DatastoreFixture.cs
+++ b/apis/Google.Cloud.Datastore.V1/Google.Cloud.Datastore.V1.IntegrationTests/DatastoreFixture.cs
@@ -49,7 +49,7 @@ public sealed class DatastoreFixture : CloudProjectFixtureBase, ICollectionFixtu
         // We don't want to wait *forever* (which would be the behavior of default poll settings)
         // but we need to have a timeout of more than a minute.
         private static readonly PollSettings AdminOperationPollSettings =
-            new PollSettings(expiration: Expiration.FromTimeout(TimeSpan.FromMinutes(5)), delay: TimeSpan.FromSeconds(5));
+            new PollSettings(expiration: Expiration.FromTimeout(TimeSpan.FromMinutes(10)), delay: TimeSpan.FromSeconds(5));
 
         public string NamespaceId { get; }
         public PartitionId PartitionId => new PartitionId { ProjectId = ProjectId, NamespaceId = NamespaceId };
diff --git a/apis/Google.Cloud.Firestore/Google.Cloud.Firestore.IntegrationTests/FirestoreFixture.cs b/apis/Google.Cloud.Firestore/Google.Cloud.Firestore.IntegrationTests/FirestoreFixture.cs
index cbc3347edc50..8107d732e9d9 100644
--- a/apis/Google.Cloud.Firestore/Google.Cloud.Firestore.IntegrationTests/FirestoreFixture.cs
+++ b/apis/Google.Cloud.Firestore/Google.Cloud.Firestore.IntegrationTests/FirestoreFixture.cs
@@ -37,7 +37,7 @@ public class FirestoreFixture : CloudProjectFixtureBase, ICollectionFixture<Fire
         // We don't want to wait *forever* (which would be the behavior of default poll settings)
         // but we need to have a timeout of more than a minute.
         private static readonly PollSettings AdminOperationPollSettings =
-            new PollSettings(expiration: Expiration.FromTimeout(TimeSpan.FromMinutes(5)), delay: TimeSpan.FromSeconds(5));
+            new PollSettings(expiration: Expiration.FromTimeout(TimeSpan.FromMinutes(10)), delay: TimeSpan.FromSeconds(5));
 
         // How long we should wait after creating an index, before returning to the caller
         // (who is expecting to be able to use the index immediately). Sometimes the CreateIndex operation
diff --git a/apis/Google.Cloud.Storage.V1/Google.Cloud.Storage.V1.IntegrationTests/ListObjectsTest.cs b/apis/Google.Cloud.Storage.V1/Google.Cloud.Storage.V1.IntegrationTests/ListObjectsTest.cs
index de7e864da133..44fb0df7c99e 100644
--- a/apis/Google.Cloud.Storage.V1/Google.Cloud.Storage.V1.IntegrationTests/ListObjectsTest.cs
+++ b/apis/Google.Cloud.Storage.V1/Google.Cloud.Storage.V1.IntegrationTests/ListObjectsTest.cs
@@ -137,7 +137,7 @@ public void ListObjectsMatchingContextKeyValuePair()
             };
             var destination = new Object
             {
-                Bucket = _fixture.ReadBucket,
+                Bucket = _fixture.SingleVersionBucket,
                 Name = IdGenerator.FromGuid(),
                 Contexts = new Object.ContextsData { Custom = custom }
             };
@@ -146,7 +146,7 @@ public void ListObjectsMatchingContextKeyValuePair()
             _fixture.Client.UploadObject(destination, source);
             string filter = $@"contexts.""{contextKey}""=""{contextValue}""";
             var options = new ListObjectsOptions { Filter = filter };
-            var objects = _fixture.Client.ListObjects(_fixture.ReadBucket, options: options).ToList();
+            var objects = _fixture.Client.ListObjects(_fixture.SingleVersionBucket, options: options).ToList();
             var obj = Assert.Single(objects);
             var fetchedContext = Assert.Single(obj.Contexts.Custom);
             Assert.Equal(contextKey, fetchedContext.Key);