Tests were not finding the media use field.

modules/islandora_audio/tests/src/Functional/GenerateAudioDerivativeTest.php

@@ -66,7 +66,7 @@ class GenerateAudioDerivativeTest extends GenerateDerivativeTestBase {
       'name[0][value]' => 'Test Media',
       'files[field_media_file_0]' => __DIR__ . '/../../fixtures/test_file.txt',
       'field_media_of[0][target_id]' => 'Test Node',
-      'field_tags[0][target_id]' => 'Preservation Master',
+      'field_media_use[0][target_id]' => 'foo', # change back to $this->preservationMasterTerm->label()
     ];
     $this->drupalGet('media/add/' . $this->testMediaType->id());
     $this->submitForm($values, $this->t('Save'));

modules/islandora_image/tests/src/Functional/GenerateImageDerivativeTest.php

@@ -68,7 +68,7 @@ class GenerateImageDerivativeTest extends GenerateDerivativeTestBase {
       'name[0][value]' => 'Test Media',
       'files[field_media_file_0]' => __DIR__ . '/../../fixtures/test_file.txt',
       'field_media_of[0][target_id]' => 'Test Node',
-      'field_tags[0][target_id]' => 'Preservation Master',
+      'field_media_use[0][target_id]' => 'foo', # change back to $this->preservationMasterTerm->label()
     ];
     $this->drupalGet('media/add/' . $this->testMediaType->id());
     $this->submitForm($values, $this->t('Save'));

modules/islandora_video/tests/src/Functional/GenerateVideoDerivativeTest.php

@@ -63,7 +63,7 @@ class GenerateVideoDerivativeTest extends GenerateDerivativeTestBase {
       'name[0][value]' => 'Test Media',
       'files[field_media_file_0]' => __DIR__ . '/../../fixtures/test_file.txt',
       'field_media_of[0][target_id]' => 'Test Node',
-      'field_tags[0][target_id]' => 'Preservation Master',
+      'field_media_use[0][target_id]' => 'foo', # change back to $this->preservationMasterTerm->label()
     ];
     $this->drupalGet('media/add/' . $this->testMediaType->id());
     $this->submitForm($values, $this->t('Save'));