diff --git a/tools/BlobRewriter/Program.cs b/tools/BlobRewriter/Program.cs
index dd70584c22..7107f44f8a 100644
--- a/tools/BlobRewriter/Program.cs
+++ b/tools/BlobRewriter/Program.cs
@@ -404,7 +404,7 @@ private static BlobContainerClient GetContainer(string storageConnectionString,
         {
             try
             {
-                var blobServiceClient = string.IsNullOrEmpty(storageUri) ? new BlobServiceClient(storageConnectionString) : new BlobServiceClient(new Uri(storageUri), string.IsNullOrEmpty(storageUAMI) ? new InteractiveBrowserCredential() : new ManagedIdentityCredential(storageUAMI));
+                var blobServiceClient = string.IsNullOrEmpty(storageUri) ? new BlobServiceClient(storageConnectionString) : new BlobServiceClient(new Uri(storageUri), string.IsNullOrEmpty(storageUAMI) ? new DefaultAzureCredential() : new ManagedIdentityCredential(storageUAMI));
                 var blobContainerClient = blobServiceClient.GetBlobContainerClient(storageContainerName);
 
                 if (!blobContainerClient.Exists())
diff --git a/tools/PerfTester/Program.cs b/tools/PerfTester/Program.cs
index d74cde4e6b..8ff7414b31 100644
--- a/tools/PerfTester/Program.cs
+++ b/tools/PerfTester/Program.cs
@@ -731,7 +731,7 @@ private static BlobContainerClient GetContainer(string storageConnectionString,
         {
             try
             {
-                var blobServiceClient = string.IsNullOrEmpty(storageUri) ? new BlobServiceClient(storageConnectionString) : new BlobServiceClient(new Uri(storageUri), string.IsNullOrEmpty(storageUAMI) ? new InteractiveBrowserCredential() : new ManagedIdentityCredential(storageUAMI));
+                var blobServiceClient = string.IsNullOrEmpty(storageUri) ? new BlobServiceClient(storageConnectionString) : new BlobServiceClient(new Uri(storageUri), string.IsNullOrEmpty(storageUAMI) ? new DefaultAzureCredential() : new ManagedIdentityCredential(storageUAMI));
                 var blobContainerClient = blobServiceClient.GetBlobContainerClient(storageContainerName);
 
                 if (!blobContainerClient.Exists())