diff --git a/script/tool/lib/src/native_test_command.dart b/script/tool/lib/src/native_test_command.dart
index 53bf41298d..8875ed2950 100644
--- a/script/tool/lib/src/native_test_command.dart
+++ b/script/tool/lib/src/native_test_command.dart
@@ -500,7 +500,6 @@ this command.
           if (exampleHasUnitTests) {
             ranUnitTests = true;
           }
-          break;
       }
     }
 
diff --git a/script/tool/lib/src/update_excerpts_command.dart b/script/tool/lib/src/update_excerpts_command.dart
index 4b4147182b..5c081ff57a 100644
--- a/script/tool/lib/src/update_excerpts_command.dart
+++ b/script/tool/lib/src/update_excerpts_command.dart
@@ -149,7 +149,6 @@ class UpdateExcerptsCommand extends PackageLoopingCommand {
                     language = 'groovy';
                   default:
                     language = extension.substring(1);
-                    break;
                 }
                 final String section = match.namedGroup('section')!;
                 final String plaster = match.namedGroup('plaster') ?? '···';
diff --git a/script/tool/test/util.dart b/script/tool/test/util.dart
index c7bdd129fb..150508dbd1 100644
--- a/script/tool/test/util.dart
+++ b/script/tool/test/util.dart
@@ -313,7 +313,6 @@ String _pluginPlatformSection(
         ]);
       default:
         assert(false, 'Unrecognized platform: $platform');
-        break;
     }
     entry = '${lines.join('\n')}\n';
   }