diff --git a/test/generators/suspenders/install/web_generator_test.rb b/test/generators/suspenders/install/web_generator_test.rb
index d5f511c8..bc199aa2 100644
--- a/test/generators/suspenders/install/web_generator_test.rb
+++ b/test/generators/suspenders/install/web_generator_test.rb
@@ -73,8 +73,8 @@ class WebGeneratorTest < Rails::Generators::TestCase
         def prepare_destination
           touch "Gemfile"
 
-          File.open("test/dummy/Gemfile", "w") do |f|
-            f.write('source "https://rubygems.org"')
+          File.open("test/dummy/Gemfile", "w") do |gemfile|
+            gemfile.write('source "https://rubygems.org"')
           end
         end