diff --git a/app/helpers/trips_helper.rb b/app/helpers/trips_helper.rb
index e035b53b..89f7771a 100644
--- a/app/helpers/trips_helper.rb
+++ b/app/helpers/trips_helper.rb
@@ -21,8 +21,6 @@ module TripsHelper
       immich_search_url(settings['immich_url'], start_date, end_date)
     when 'photoprism'
       photoprism_search_url(settings['photoprism_url'], start_date, end_date)
-    else
-      nil # return nil for nil or unknown source
     end
   end
 
diff --git a/app/services/imports/create.rb b/app/services/imports/create.rb
index 1f952715..67d05abb 100644
--- a/app/services/imports/create.rb
+++ b/app/services/imports/create.rb
@@ -49,7 +49,7 @@ class Imports::Create
   private
 
   def importer(source)
-    return raise ArgumentError, 'Import source cannot be nil' if source.nil?
+    raise ArgumentError, 'Import source cannot be nil' if source.nil?
 
     case source.to_s
     when 'google_semantic_history'      then GoogleMaps::SemanticHistoryImporter
diff --git a/app/services/photos/thumbnail.rb b/app/services/photos/thumbnail.rb
index 9ad4e57e..ad2da385 100644
--- a/app/services/photos/thumbnail.rb
+++ b/app/services/photos/thumbnail.rb
@@ -11,7 +11,7 @@ class Photos::Thumbnail
 
   def call
     raise ArgumentError, 'Photo source cannot be nil' if source.nil?
-    raise unsupported_source_error unless SUPPORTED_SOURCES.include?(source)
+    unsupported_source_error unless SUPPORTED_SOURCES.include?(source)
 
     HTTParty.get(request_url, headers: headers)
   end
@@ -52,7 +52,7 @@ class Photos::Thumbnail
     request_headers
   end
 
-  def unsupported_source_error
+  unsupported_source_error unless SUPPORTED_SOURCES.include?(source)
     raise ArgumentError, "Unsupported source: #{source}"
   end
 end