diff --git a/pkg/analysis_server/lib/src/analysis_server.dart b/pkg/analysis_server/lib/src/analysis_server.dart
index fd9daec..5a3e760 100644
--- a/pkg/analysis_server/lib/src/analysis_server.dart
+++ b/pkg/analysis_server/lib/src/analysis_server.dart
@@ -161,9 +161,12 @@
         performance = performanceAfterStartup = ServerPerformance();
       });
     });
-    var notification =
-        ServerConnectedParams(PROTOCOL_VERSION, io.pid).toNotification();
-    channel.sendNotification(notification);
+    channel.sendNotification(
+      ServerConnectedParams(
+        options.reportProtocolVersion ?? PROTOCOL_VERSION,
+        io.pid,
+      ).toNotification(),
+    );
     channel.listen(handleRequest, onDone: done, onError: error);
     handlers = <server.RequestHandler>[
       ServerDomainHandler(this),
@@ -635,6 +638,9 @@
 
   /// The set of enabled features.
   FeatureSet featureSet = FeatureSet();
+
+  /// If set, this string will be reported as the protocol version.
+  String? reportProtocolVersion;
 }
 
 class ServerContextManagerCallbacks extends ContextManagerCallbacks {
diff --git a/pkg/analysis_server/lib/src/domain_server.dart b/pkg/analysis_server/lib/src/domain_server.dart
index 5dca197..559f3b8 100644
--- a/pkg/analysis_server/lib/src/domain_server.dart
+++ b/pkg/analysis_server/lib/src/domain_server.dart
@@ -19,7 +19,9 @@
 
   /// Return the version number of the analysis server.
   Response getVersion(Request request) {
-    return ServerGetVersionResult(PROTOCOL_VERSION).toResponse(request.id);
+    return ServerGetVersionResult(
+      server.options.reportProtocolVersion ?? PROTOCOL_VERSION,
+    ).toResponse(request.id);
   }
 
   @override
diff --git a/pkg/analysis_server/lib/src/server/driver.dart b/pkg/analysis_server/lib/src/server/driver.dart
index 025eb5b..5016f76 100644
--- a/pkg/analysis_server/lib/src/server/driver.dart
+++ b/pkg/analysis_server/lib/src/server/driver.dart
@@ -101,6 +101,9 @@
   /// The path to the package config file override.
   static const String PACKAGES_FILE = 'packages';
 
+  /// The forced protocol version that the server will report to the client.
+  static const String REPORT_PROTOCOL_VERSION = 'report-protocol-version';
+
   /// The name of the flag specifying the server protocol to use.
   static const String SERVER_PROTOCOL = 'protocol';
   static const String PROTOCOL_ANALYZER = 'analyzer';
@@ -160,6 +163,8 @@
     analysisServerOptions.clientVersion = results[CLIENT_VERSION];
     analysisServerOptions.cacheFolder = results[CACHE_FOLDER];
     analysisServerOptions.packagesFile = results[PACKAGES_FILE];
+    analysisServerOptions.reportProtocolVersion =
+        results[REPORT_PROTOCOL_VERSION];
 
     // Read in any per-SDK overrides specified in <sdk>/config/settings.json.
     var sdkConfig = SdkConfiguration.readFromSdk();
@@ -688,6 +693,14 @@
         defaultsTo: false,
         negatable: false,
         hide: true);
+    parser.addOption(
+      REPORT_PROTOCOL_VERSION,
+      valueHelp: 'version',
+      help: 'The protocol version that the server will report to the client, '
+          'can be used to temporary enabling features that we expect to be '
+          'available in future versions.',
+      hide: true,
+    );
 
     //
     // Hidden; these are deprecated and no longer read from.