diff --git a/lib/testdata_importer.rb b/lib/testdata_importer.rb
--- a/lib/testdata_importer.rb
+++ b/lib/testdata_importer.rb
@@ -131,6 +131,8 @@
       @problem.description = description
       @problem.save
       return "\nProblem description imported from #{filename}."
+    else
+      return ''
     end
   end