diff --git a/spec/lib/backup/repository_spec.rb b/spec/lib/backup/repository_spec.rb
index 023bedaaebb..f583b2021a2 100644
--- a/spec/lib/backup/repository_spec.rb
+++ b/spec/lib/backup/repository_spec.rb
@@ -92,7 +92,7 @@ describe Backup::Repository do
       end
 
       def list_repositories
-        Dir[SEED_STORAGE_PATH + '/*.git']
+        Dir[File.join(SEED_STORAGE_PATH, '*.git')]
       end
     end