diff --git a/package_manager/src/EventSubscriber/ExcludedPathsSubscriber.php b/package_manager/src/EventSubscriber/ExcludedPathsSubscriber.php
index 5eb7e08811ea6a7cdcf07a72ba8acb66ca9a1e61..844105463c3ddbe431c7e931d562216874cc1043 100644
--- a/package_manager/src/EventSubscriber/ExcludedPathsSubscriber.php
+++ b/package_manager/src/EventSubscriber/ExcludedPathsSubscriber.php
@@ -18,6 +18,8 @@ use Symfony\Component\Finder\Finder;
  */
 class ExcludedPathsSubscriber implements EventSubscriberInterface {
 
+  use PathExclusionsTrait;
+
   /**
    * The current site path, relative to the Drupal root.
    *
@@ -46,13 +48,6 @@ class ExcludedPathsSubscriber implements EventSubscriberInterface {
    */
   protected $database;
 
-  /**
-   * The path locator service.
-   *
-   * @var \Drupal\package_manager\PathLocator
-   */
-  protected $pathLocator;
-
   /**
    * Constructs an ExcludedPathsSubscriber.
    *
@@ -75,51 +70,6 @@ class ExcludedPathsSubscriber implements EventSubscriberInterface {
     $this->pathLocator = $path_locator;
   }
 
-  /**
-   * Flags paths to be excluded, relative to the web root.
-   *
-   * This should only be used for paths that, if they exist at all, are
-   * *guaranteed* to exist within the web root.
-   *
-   * @param \Drupal\package_manager\Event\PreCreateEvent|\Drupal\package_manager\Event\PreApplyEvent $event
-   *   The event object.
-   * @param string[] $paths
-   *   The paths to exclude. These should be relative to the web root, and will
-   *   be made relative to the project root.
-   */
-  protected function excludeInWebRoot(StageEvent $event, array $paths): void {
-    $web_root = $this->pathLocator->getWebRoot();
-    if ($web_root) {
-      $web_root .= '/';
-    }
-
-    foreach ($paths as $path) {
-      // Make the path relative to the project root by prefixing the web root.
-      $event->excludePath($web_root . $path);
-    }
-  }
-
-  /**
-   * Flags paths to be excluded, relative to the project root.
-   *
-   * @param \Drupal\package_manager\Event\PreCreateEvent|\Drupal\package_manager\Event\PreApplyEvent $event
-   *   The event object.
-   * @param string[] $paths
-   *   The paths to exclude. Absolute paths will be made relative to the project
-   *   root; relative paths will be assumed to already be relative to the
-   *   project root, and excluded as given.
-   */
-  protected function excludeInProjectRoot(StageEvent $event, array $paths): void {
-    $project_root = $this->pathLocator->getProjectRoot();
-
-    foreach ($paths as $path) {
-      // Make absolute paths relative to the project root.
-      $path = str_replace($project_root, '', $path);
-      $path = ltrim($path, '/');
-      $event->excludePath($path);
-    }
-  }
-
   /**
    * Excludes common paths from staging operations.
    *
diff --git a/package_manager/src/EventSubscriber/PathExclusionsTrait.php b/package_manager/src/EventSubscriber/PathExclusionsTrait.php
new file mode 100644
index 0000000000000000000000000000000000000000..c928a543d180ee8ab8ba5b9449993dba396a5e73
--- /dev/null
+++ b/package_manager/src/EventSubscriber/PathExclusionsTrait.php
@@ -0,0 +1,64 @@
+<?php
+
+namespace Drupal\package_manager\EventSubscriber;
+
+use Drupal\package_manager\Event\StageEvent;
+
+/**
+ * Contains methods for excluding paths from staging operations.
+ */
+trait PathExclusionsTrait {
+
+  /**
+   * The path locator service.
+   *
+   * @var \Drupal\package_manager\PathLocator
+   */
+  protected $pathLocator;
+
+  /**
+   * Flags paths to be excluded, relative to the web root.
+   *
+   * This should only be used for paths that, if they exist at all, are
+   * *guaranteed* to exist within the web root.
+   *
+   * @param \Drupal\package_manager\Event\PreCreateEvent|\Drupal\package_manager\Event\PreApplyEvent $event
+   *   The event object.
+   * @param string[] $paths
+   *   The paths to exclude. These should be relative to the web root, and will
+   *   be made relative to the project root.
+   */
+  protected function excludeInWebRoot(StageEvent $event, array $paths): void {
+    $web_root = $this->pathLocator->getWebRoot();
+    if ($web_root) {
+      $web_root .= '/';
+    }
+
+    foreach ($paths as $path) {
+      // Make the path relative to the project root by prefixing the web root.
+      $event->excludePath($web_root . $path);
+    }
+  }
+
+  /**
+   * Flags paths to be excluded, relative to the project root.
+   *
+   * @param \Drupal\package_manager\Event\PreCreateEvent|\Drupal\package_manager\Event\PreApplyEvent $event
+   *   The event object.
+   * @param string[] $paths
+   *   The paths to exclude. Absolute paths will be made relative to the project
+   *   root; relative paths will be assumed to already be relative to the
+   *   project root, and excluded as given.
+   */
+  protected function excludeInProjectRoot(StageEvent $event, array $paths): void {
+    $project_root = $this->pathLocator->getProjectRoot();
+
+    foreach ($paths as $path) {
+      // Make absolute paths relative to the project root.
+      $path = str_replace($project_root, '', $path);
+      $path = ltrim($path, '/');
+      $event->excludePath($path);
+    }
+  }
+
+}