Learned that I should not refer to env vars directly so I removed all references.

app/Repositories/ImportJob/ImportJobRepository.php

@@ -54,7 +54,7 @@ class ImportJobRepository implements ImportJobRepositoryInterface
         $this->maxUploadSize = (int)config('firefly.maxUploadSize');
         $this->uploadDisk    = Storage::disk('upload');
 
-        if ('testing' === env('APP_ENV')) {
+        if ('testing' === config('app.env')) {
             Log::warning(sprintf('%s should not be instantiated in the TEST environment!', \get_class($this)));
         }
     }