diff --git a/pkg/dartdev/lib/dartdev.dart b/pkg/dartdev/lib/dartdev.dart
index d1466e91b536..2b57c07dc528 100644
--- a/pkg/dartdev/lib/dartdev.dart
+++ b/pkg/dartdev/lib/dartdev.dart
@@ -71,7 +71,7 @@ class DartdevRunner extends CommandRunner<int> {
       'A command-line utility for Dart development';
 
   @override
-  late final ArgParser argParser;
+  final ArgParser argParser;
 
   final bool verbose;
 
diff --git a/pkg/dartdev/lib/src/commands/compile.dart b/pkg/dartdev/lib/src/commands/compile.dart
index bae371d59dab..08cee8b4f885 100644
--- a/pkg/dartdev/lib/src/commands/compile.dart
+++ b/pkg/dartdev/lib/src/commands/compile.dart
@@ -895,8 +895,8 @@ Sets the verbosity level of the compilation.
     flagDefaultsTo: true,
   );
 
-  late final Option defineOption;
-  late final Option packagesOption;
+  final Option defineOption;
+  final Option packagesOption;
 
   CompileSubcommandCommand(super.name, super.description, super.verbose,
       {super.hidden})
diff --git a/pkg/dartdev/lib/src/dds_runner.dart b/pkg/dartdev/lib/src/dds_runner.dart
index 71f99f4486e5..749f06259975 100644
--- a/pkg/dartdev/lib/src/dds_runner.dart
+++ b/pkg/dartdev/lib/src/dds_runner.dart
@@ -50,7 +50,7 @@ class DDSRunner {
     const devToolsMessagePrefix =
         'The Dart DevTools debugger and profiler is available at:';
     if (debugDds) {
-      late StreamSubscription stdoutSub;
+      late final StreamSubscription stdoutSub;
       stdoutSub = process.stdout.transform(utf8.decoder).listen((event) {
         if (event.startsWith(devToolsMessagePrefix)) {
           final ddsDebuggingUri = event.split(' ').last;
@@ -61,7 +61,7 @@ class DDSRunner {
         }
       });
     }
-    late StreamSubscription stderrSub;
+    late final StreamSubscription stderrSub;
     stderrSub = process.stderr.transform(utf8.decoder).listen((event) {
       final result = json.decode(event) as Map<String, dynamic>;
       final state = result['state'];
diff --git a/pkg/dartdev/lib/src/generate_kernel.dart b/pkg/dartdev/lib/src/generate_kernel.dart
index 00b4fc024c21..ea906bbfb7a6 100644
--- a/pkg/dartdev/lib/src/generate_kernel.dart
+++ b/pkg/dartdev/lib/src/generate_kernel.dart
@@ -150,7 +150,7 @@ Future<void> ensureCompilationServerIsRunning(
   }
   try {
     Directory(p.dirname(serverInfoFile.path)).createSync(recursive: true);
-    late final Process frontendServerProcess;
+    final Process frontendServerProcess;
     if (File(sdk.frontendServerAotSnapshot).existsSync()) {
       frontendServerProcess = await Process.start(
         sdk.dartAotRuntime,
diff --git a/pkg/dartdev/tool/sdk_size.dart b/pkg/dartdev/tool/sdk_size.dart
index bf711a7efdb6..d6691779452b 100644
--- a/pkg/dartdev/tool/sdk_size.dart
+++ b/pkg/dartdev/tool/sdk_size.dart
@@ -11,13 +11,11 @@ import 'dart:io';
 
 import 'package:path/path.dart' as p;
 
-late final String dartSdkPath;
+final String dartSdkPath = p.dirname(p.dirname(Platform.resolvedExecutable));
 
 final List<FileStats> fileStats = [];
 
 void main(List<String> arguments) {
-  final vm = Platform.resolvedExecutable;
-  dartSdkPath = p.dirname(p.dirname(vm));
   final version =
       File(p.join(dartSdkPath, 'version')).readAsStringSync().trim();