diff --git a/rubygem-railties.spec b/rubygem-railties.spec
index fe1b8de..f25a817 100644
--- a/rubygem-railties.spec
+++ b/rubygem-railties.spec
@@ -1,3 +1,4 @@
+%global gem_name railties
 %bcond_with  test
 %{?_with_bootstrap: %global bootstrap 1}
 %global bootstrap 1
@@ -9,6 +10,9 @@ License:             MIT
 URL:                 http://rubyonrails.org
 Source0:             https://rubygems.org/gems/%{gem_name}-%{version}.gem
 Source1:             https://github.com/rails/rails/archive/v%{version}.tar.gz
+# Check value of result.source_location in
+# test_unit/reporter.rb#format_rerun_snippet
+# https://github.com/rails/rails/pull/32297
 Patch0:              rubygem-railties-5.1.5-check-value-of-result-source-location.patch
 Suggests:            %{_bindir}/sqlite3
 BuildRequires:       ruby(release) rubygems-devel ruby >= 2.2.2 rubygem(actioncable) = %{version}