diff --git a/src/Microsoft.DotNet.Build.CloudTestTasks/UploadClient.cs b/src/Microsoft.DotNet.Build.CloudTestTasks/UploadClient.cs
index a8e71cec8c..ce31e8d787 100644
--- a/src/Microsoft.DotNet.Build.CloudTestTasks/UploadClient.cs
+++ b/src/Microsoft.DotNet.Build.CloudTestTasks/UploadClient.cs
@@ -63,7 +63,7 @@ public async Task UploadBlockBlobAsync(
             List<string> blockIds = new List<string>();
             int numberOfBlocks = (size / blockSize) + 1;
             int countForId = 0;
-            using (FileStream fileStreamTofilePath = new FileStream(filePath, FileMode.Open))
+            using (FileStream fileStreamTofilePath = new FileStream(filePath, FileMode.Open, FileAccess.Read))
             {
                 int offset = 0;