2 files changed, 15 insertions, 7 deletions
diff --git a/app/services/projects/import_export/cleanup_service.rb b/app/services/projects/import_export/cleanup_service.rb
index 75eaee0cb7b..2e6bfb99189 100644
--- a/app/services/projects/import_export/cleanup_service.rb
+++ b/app/services/projects/import_export/cleanup_service.rb
@@ -1,11 +1,15 @@
 module Projects
   module ImportExport
     class CleanupService
-      RESERVED_REFS_NAMES =
+      def self.reserved_refs_names
         %w[heads tags merge-requests keep-around environments]
-      RESERVED_REFS_REGEXP =
-        %r{\Arefs/(?:#{
-          RESERVED_REFS_NAMES.map(&Regexp.method(:escape)).join('|')})/}x
+      end
+
+      def self.reserved_refs_regexp
+        names = reserved_refs_names.map(&Regexp.method(:escape)).join('|')
+
+        %r{\Arefs/(?:#{names})/}
+      end
 
       attr_reader :project
 
@@ -23,8 +27,12 @@ module Projects
       private
 
       def garbage_refs
-        @garbage_refs ||= rugged.references.reject do |ref|
-          ref.name =~ RESERVED_REFS_REGEXP
+        @garbage_refs ||= begin
+          reserved_refs_regexp = self.class.reserved_refs_regexp
+
+          rugged.references.reject do |ref|
+            ref.name =~ reserved_refs_regexp
+          end
         end
       end
 
diff --git a/spec/services/projects/import_export/cleanup_service_spec.rb b/spec/services/projects/import_export/cleanup_service_spec.rb
index b46efc40a2f..108d0ea2ecc 100644
--- a/spec/services/projects/import_export/cleanup_service_spec.rb
+++ b/spec/services/projects/import_export/cleanup_service_spec.rb
@@ -37,7 +37,7 @@ describe Projects::ImportExport::CleanupService do
       end
     end
 
-    described_class::RESERVED_REFS_NAMES.each do |name|
+    described_class.reserved_refs_names.each do |name|
       context "with a ref in refs/#{name}/tmp" do
         before do
           repository.write_ref("refs/#{name}/tmp", sha)