diff --git a/src/deploy-cromwell-on-azure/Configuration.cs b/src/deploy-cromwell-on-azure/Configuration.cs
index a48b8104..70842edb 100644
--- a/src/deploy-cromwell-on-azure/Configuration.cs
+++ b/src/deploy-cromwell-on-azure/Configuration.cs
@@ -38,7 +38,7 @@ public abstract class UserAccessibleConfiguration
         public string SubscriptionId { get; set; }
         public string RegionName { get; set; }
         public string MainIdentifierPrefix { get; set; } = "coa";
-        public string VmSize { get; set; } = "Standard_D4s_v3";
+        public string VmSize { get; set; } = "Standard_D4s_v4";
         public string VnetAddressSpace { get; set; } = "10.1.0.0/16"; // 10.1.0.0 - 10.1.255.255, 65536 IPs
         // Address space for CoA services.
         public string VmSubnetAddressSpace { get; set; } = "10.1.0.0/24"; // 10.1.0.0 - 10.1.0.255, 256 IPs
diff --git a/src/deploy-cromwell-on-azure/Deployer.cs b/src/deploy-cromwell-on-azure/Deployer.cs
index 03b79e98..af0703f9 100644
--- a/src/deploy-cromwell-on-azure/Deployer.cs
+++ b/src/deploy-cromwell-on-azure/Deployer.cs
@@ -363,6 +363,7 @@ await Execute("Connecting to Azure Services...", async () =>
                         }
 
                         ValidateRegionName(configuration.RegionName);
+                        await ValidateVmAsync();
                         ValidateMainIdentifierPrefix(configuration.MainIdentifierPrefix);
                         storageAccount = await ValidateAndGetExistingStorageAccountAsync();
                         batchAccount = await ValidateAndGetExistingBatchAccountAsync();
diff --git a/src/ga4gh-tes b/src/ga4gh-tes
index 4244ae74..3cc7747b 160000
--- a/src/ga4gh-tes
+++ b/src/ga4gh-tes
@@ -1 +1 @@
-Subproject commit 4244ae74df3ac5725736169f0c2a4753366dcc32
+Subproject commit 3cc7747b9b3acabc7058b41c24f80f48faed2b70