diff --git a/src/Runner.Worker/ActionManager.cs b/src/Runner.Worker/ActionManager.cs
index 49e14e68a..6014dc320 100644
--- a/src/Runner.Worker/ActionManager.cs
+++ b/src/Runner.Worker/ActionManager.cs
@@ -1,7 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.IO.Compression;
+using System.IO.Compression;     // required for OS_WINDOWS
 using System.Linq;
 using System.Net;
 using System.Net.Http;
diff --git a/src/Runner.Worker/DiagnosticLogManager.cs b/src/Runner.Worker/DiagnosticLogManager.cs
index 698f2112c..278a1f8ea 100644
--- a/src/Runner.Worker/DiagnosticLogManager.cs
+++ b/src/Runner.Worker/DiagnosticLogManager.cs
@@ -5,7 +5,6 @@ using System.IO.Compression;
 using GitHub.DistributedTask.WebApi;
 using System.Linq;
 using System.Globalization;
-using System.Threading.Tasks;
 using Pipelines = GitHub.DistributedTask.Pipelines;
 using GitHub.Runner.Common;
 using GitHub.Runner.Sdk;
@@ -32,7 +31,7 @@ namespace GitHub.Runner.Worker
     {
         private static string DateTimeFormat = "yyyyMMdd-HHmmss";
         public void UploadDiagnosticLogs(IExecutionContext executionContext,
-                                         IExecutionContext parentContext, 
+                                         IExecutionContext parentContext,
                                          Pipelines.AgentJobRequestMessage message,
                                          DateTime jobStartTimeUtc)
         {
diff --git a/src/Test/L0/Worker/ActionManagerL0.cs b/src/Test/L0/Worker/ActionManagerL0.cs
index 8d25c9039..093305f33 100644
--- a/src/Test/L0/Worker/ActionManagerL0.cs
+++ b/src/Test/L0/Worker/ActionManagerL0.cs
@@ -13,7 +13,11 @@ using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Sdk;
 using GitHub.Runner.Worker;
 using GitHub.Runner.Worker.Container;
-using GitHub.Services.Common;
+
+#if OS_WINDOWS
+using System.IO.Compression;
+#endif
+
 using Moq;
 using Moq.Protected;
 using Xunit;