Use env webpacker css settings except for rspec

config/webpacker.yml

@@ -16,7 +16,7 @@ default: &default
   cache_manifest: false
 
   # Extract and emit a css file
-  extract_css: false
+  extract_css: true
 
   static_assets_extensions:
     - .jpg
@@ -79,6 +79,9 @@ test:
   # Compile test packs to a separate directory
   public_output_path: packs-test
 
+  # Extract and emit a css file
+  extract_css: false
+
 production:
   <<: *default