diff --git a/src/Composer/Installer.php b/src/Composer/Installer.php
index bfaffefd0..1f8b135cc 100644
--- a/src/Composer/Installer.php
+++ b/src/Composer/Installer.php
@@ -1284,7 +1284,7 @@ class Installer
      *
      * Packages which are listed as requirements in the root package will be
      * skipped including their dependencies, unless they are listed in the
-     * update whitelist themselves or `with-all-dependencies` is used.
+     * update whitelist themselves or $whitelistAllDependencies is true.
      *
      * @param RepositoryInterface $localOrLockRepo Use the locked repo if available, otherwise installed repo will do
      *                                             As we want the most accurate package list to work with, and installed
diff --git a/tests/Composer/Test/Fixtures/installer/update-with-all-dependencies.test b/tests/Composer/Test/Fixtures/installer/update-with-all-dependencies.test
index 7e2573f9c..f4fbfce9b 100644
--- a/tests/Composer/Test/Fixtures/installer/update-with-all-dependencies.test
+++ b/tests/Composer/Test/Fixtures/installer/update-with-all-dependencies.test
@@ -2,7 +2,7 @@
 
 See Github issue #6661 ( github.com/composer/composer/issues/6661 ).
 
-When `with-all-dependencies` is used, Composer\Installer::whitelistUpdateDependencies should update all whitelisted dependencies, even if the dependency is a root requirement.
+When `--with-all-dependencies` is used, Composer\Installer::whitelistUpdateDependencies should update the dependencies of all whitelisted packages, even if the dependency is a root requirement.
 
 --COMPOSER--
 {