diff --git a/Sources/Commands/SwiftTestCommand.swift b/Sources/Commands/SwiftTestCommand.swift
index a5b1e2cd919..0e452815489 100644
--- a/Sources/Commands/SwiftTestCommand.swift
+++ b/Sources/Commands/SwiftTestCommand.swift
@@ -130,6 +130,11 @@ struct TestEventStreamOptions: ParsableArguments {
     @Option(name: .customLong("attachments-path"),
             help: "Path where attachments should be written (Swift Testing only). This path must be an existing directory the current user can write to. If not specified, any attachments created during testing are discarded.")
     var attachmentsPath: AbsolutePath?
+
+    /// Which testing experimental features should be enabled
+    @Option(name: .customLong("enable-experimental-testing-feature"),
+            help: .private)
+    var enableExperimentalFeatures: String?
 }
 
 struct TestCommandOptions: ParsableArguments {