Created and added patch for placeimg test issue.

composer.json

@@ -376,6 +376,9 @@
             },
             "drupal/webp": {
                 "https://www.drupal.org/project/webp/issues/3281606": "patches/contrib/webp-mr-33.patch"
+            },
+            "su-sws/stanford_migrate": {
+                "Remove placeimage URL from unit test": "patches/stanford/stanford_migrate-placeimg-test-fix.patch"
             }
         }
     },

patches/stanford/stanford_migrate-placeimg-test-fix.patch

@@ -0,0 +1,13 @@
+diff --git a/tests/src/Unit/Plugin/migrate/process/StanfordFileImportTest.php b/tests/src/Unit/Plugin/migrate/process/StanfordFileImportTest.php
+index c13db27..a116d92 100644
+--- a/tests/src/Unit/Plugin/migrate/process/StanfordFileImportTest.php
++++ b/tests/src/Unit/Plugin/migrate/process/StanfordFileImportTest.php
+@@ -55,8 +55,6 @@ class StanfordFileImportTest extends UnitTestCase {
+     $migrate_executable = $this->createMock(MigrateExecutable::class);
+     $row = $this->createMock(Row::class);
+     $this->assertNull($plugin->transform('https://identity.stanford.edu/wp-content/uploads/sites/3/2020/07/block-s-right.png', $migrate_executable, $row, 'field_stuff'));
+-    $this->assertNull($plugin->transform('https://placeimg.com/640/480/any', $migrate_executable, $row, 'field_stuff'));
+-
+
+     $configuration = ['max_size' => '10MB'];
+     $definition = [];