diff --git a/src/LiquidCode.Tester.Worker/Services/Isolate/IsolateService.cs b/src/LiquidCode.Tester.Worker/Services/Isolate/IsolateService.cs
index 8f6b65f..13f4229 100644
--- a/src/LiquidCode.Tester.Worker/Services/Isolate/IsolateService.cs
+++ b/src/LiquidCode.Tester.Worker/Services/Isolate/IsolateService.cs
@@ -182,7 +182,7 @@ public class IsolateService
             foreach (var binding in options.DirectoryBindings)
             {
                 var dirSpec = binding.ReadOnly
-                    ? $"--dir={binding.HostPath}={binding.SandboxPath}:ro"
+                    ? $"--dir={binding.HostPath}={binding.SandboxPath}"
                     : $"--dir={binding.HostPath}={binding.SandboxPath}:rw";
                 args.Add(dirSpec);
             }