diff --git a/Rakefile b/Rakefile
index 226c7e8a..528424f1 100644
--- a/Rakefile
+++ b/Rakefile
@@ -18,7 +18,7 @@ task :prepare_assets do
   system "rm -rf test/dummy/public/packs"
   system "rm -rf test/dummy/public/packs-test"
   system "yarn install --frozen-lockfile"
-  system "(cd test/dummy && yarn install --frozen-lockfile)"
+  system "(cd test/dummy && yarn install --frozen-lockfile) && RAILS_ENV=test bundle exec rails webpacker:compile"
 end
 
 # Generate dependency licenses