diff --git a/src/Composer/Command/InstallCommand.php b/src/Composer/Command/InstallCommand.php
index d059928cc..033f32195 100644
--- a/src/Composer/Command/InstallCommand.php
+++ b/src/Composer/Command/InstallCommand.php
@@ -38,9 +38,9 @@ class InstallCommand extends BaseCommand
                 new InputOption('prefer-source', null, InputOption::VALUE_NONE, 'Forces installation from package sources when possible, including VCS information.'),
                 new InputOption('prefer-dist', null, InputOption::VALUE_NONE, 'Forces installation from package dist even for dev versions.'),
                 new InputOption('dry-run', null, InputOption::VALUE_NONE, 'Outputs the operations but will not execute anything (implicitly enables --verbose).'),
-                new InputOption('dev', null, InputOption::VALUE_NONE, 'Enables installation of require-dev packages (enabled by default, only present for BC).'),
+                new InputOption('dev', null, InputOption::VALUE_NONE, 'DEPRECATED: Enables installation of require-dev packages (enabled by default, only present for BC).'),
+                new InputOption('no-suggest', null, InputOption::VALUE_NONE, 'DEPRECATED: This flag does not exist anymore.'),
                 new InputOption('no-dev', null, InputOption::VALUE_NONE, 'Disables installation of require-dev packages.'),
-                new InputOption('no-custom-installers', null, InputOption::VALUE_NONE, 'DEPRECATED: Use no-plugins instead.'),
                 new InputOption('no-autoloader', null, InputOption::VALUE_NONE, 'Skips autoloader generation'),
                 new InputOption('no-scripts', null, InputOption::VALUE_NONE, 'Skips the execution of all scripts defined in composer.json file.'),
                 new InputOption('no-progress', null, InputOption::VALUE_NONE, 'Do not output download progress.'),
@@ -69,21 +69,19 @@ EOT
     protected function execute(InputInterface $input, OutputInterface $output)
     {
         $io = $this->getIO();
+        if ($input->getOption('dev')) {
+            $io->writeError('<warning>You are using the deprecated option "--dev". It has no effect and will break in Composer 3.</warning>');
+        }
+        if ($input->getOption('no-suggest')) {
+            $io->writeError('<warning>You are using the deprecated option "--no-suggest". It has no effect and will break in Composer 3.</warning>');
+        }
+
         if ($args = $input->getArgument('packages')) {
             $io->writeError('<error>Invalid argument '.implode(' ', $args).'. Use "composer require '.implode(' ', $args).'" instead to add packages to your composer.json.</error>');
 
             return 1;
         }
 
-        if ($input->getOption('no-custom-installers')) {
-            $io->writeError('<warning>You are using the deprecated option "no-custom-installers". Use "no-plugins" instead.</warning>');
-            $input->setOption('no-plugins', true);
-        }
-
-        if ($input->getOption('dev')) {
-            $io->writeError('<warning>You are using the deprecated option "dev". Dev packages are installed by default now.</warning>');
-        }
-
         $composer = $this->getComposer(true, $input->getOption('no-plugins'));
 
         $commandEvent = new CommandEvent(PluginEvents::COMMAND, 'install', $input, $output);
diff --git a/src/Composer/Command/RequireCommand.php b/src/Composer/Command/RequireCommand.php
index 5b040b038..67188504d 100644
--- a/src/Composer/Command/RequireCommand.php
+++ b/src/Composer/Command/RequireCommand.php
@@ -59,6 +59,7 @@ class RequireCommand extends InitCommand
                 new InputOption('prefer-source', null, InputOption::VALUE_NONE, 'Forces installation from package sources when possible, including VCS information.'),
                 new InputOption('prefer-dist', null, InputOption::VALUE_NONE, 'Forces installation from package dist even for dev versions.'),
                 new InputOption('fixed', null, InputOption::VALUE_NONE, 'Write fixed version to the composer.json.'),
+                new InputOption('no-suggest', null, InputOption::VALUE_NONE, 'DEPRECATED: This flag does not exist anymore.'),
                 new InputOption('no-progress', null, InputOption::VALUE_NONE, 'Do not output download progress.'),
                 new InputOption('no-update', null, InputOption::VALUE_NONE, 'Disables the automatic update of the dependencies.'),
                 new InputOption('no-scripts', null, InputOption::VALUE_NONE, 'Skips the execution of all scripts defined in composer.json file.'),
@@ -104,6 +105,10 @@ EOT
         $this->file = Factory::getComposerFile();
         $io = $this->getIO();
 
+        if ($input->getOption('no-suggest')) {
+            $io->writeError('<warning>You are using the deprecated option "--no-suggest". It has no effect and will break in Composer 3.</warning>');
+        }
+
         $this->newlyCreated = !file_exists($this->file);
         if ($this->newlyCreated && !file_put_contents($this->file, "{\n}\n")) {
             $io->writeError('<error>'.$this->file.' could not be created.</error>');
diff --git a/src/Composer/Command/UpdateCommand.php b/src/Composer/Command/UpdateCommand.php
index 840f7ae28..9c875a57d 100644
--- a/src/Composer/Command/UpdateCommand.php
+++ b/src/Composer/Command/UpdateCommand.php
@@ -42,12 +42,12 @@ class UpdateCommand extends BaseCommand
                 new InputOption('prefer-source', null, InputOption::VALUE_NONE, 'Forces installation from package sources when possible, including VCS information.'),
                 new InputOption('prefer-dist', null, InputOption::VALUE_NONE, 'Forces installation from package dist even for dev versions.'),
                 new InputOption('dry-run', null, InputOption::VALUE_NONE, 'Outputs the operations but will not execute anything (implicitly enables --verbose).'),
-                new InputOption('dev', null, InputOption::VALUE_NONE, 'Enables installation of require-dev packages (enabled by default, only present for BC).'),
+                new InputOption('dev', null, InputOption::VALUE_NONE, 'DEPRECATED: Enables installation of require-dev packages (enabled by default, only present for BC).'),
                 new InputOption('no-dev', null, InputOption::VALUE_NONE, 'Disables installation of require-dev packages.'),
                 new InputOption('lock', null, InputOption::VALUE_NONE, 'Only updates the lock file hash to suppress warning about the lock file being out of date.'),
-                new InputOption('no-custom-installers', null, InputOption::VALUE_NONE, 'DEPRECATED: Use no-plugins instead.'),
                 new InputOption('no-autoloader', null, InputOption::VALUE_NONE, 'Skips autoloader generation'),
                 new InputOption('no-scripts', null, InputOption::VALUE_NONE, 'Skips the execution of all scripts defined in composer.json file.'),
+                new InputOption('no-suggest', null, InputOption::VALUE_NONE, 'DEPRECATED: This flag does not exist anymore.'),
                 new InputOption('no-progress', null, InputOption::VALUE_NONE, 'Do not output download progress.'),
                 new InputOption('with-dependencies', null, InputOption::VALUE_NONE, 'Update also dependencies of packages in the argument list, except those which are root requirements.'),
                 new InputOption('with-all-dependencies', null, InputOption::VALUE_NONE, 'Update also dependencies of packages in the argument list, including those which are root requirements.'),
@@ -90,13 +90,11 @@ EOT
     protected function execute(InputInterface $input, OutputInterface $output)
     {
         $io = $this->getIO();
-        if ($input->getOption('no-custom-installers')) {
-            $io->writeError('<warning>You are using the deprecated option "no-custom-installers". Use "no-plugins" instead.</warning>');
-            $input->setOption('no-plugins', true);
-        }
-
         if ($input->getOption('dev')) {
-            $io->writeError('<warning>You are using the deprecated option "dev". Dev packages are installed by default now.</warning>');
+            $io->writeError('<warning>You are using the deprecated option "--dev". It has no effect and will break in Composer 3.</warning>');
+        }
+        if ($input->getOption('no-suggest')) {
+            $io->writeError('<warning>You are using the deprecated option "--no-suggest". It has no effect and will break in Composer 3.</warning>');
         }
 
         $composer = $this->getComposer(true, $input->getOption('no-plugins'));