diff --git a/.github/rm-invalid-lowest-lock-files.php b/.github/rm-invalid-lowest-lock-files.php
index 3105942a09..c036fd356f 100644
--- a/.github/rm-invalid-lowest-lock-files.php
+++ b/.github/rm-invalid-lowest-lock-files.php
@@ -104,8 +104,7 @@ foreach ($composerJsons as list($dir, $lockedPackages)) {
     }
 }
 
-if (!$referencedCommits || (isset($_SERVER['TRAVIS_PULL_REQUEST']) && 'false' !== $_SERVER['TRAVIS_PULL_REQUEST'])) {
-    // cached commits cannot be stale for PRs
+if (!$referencedCommits) {
     return;
 }