diff --git a/lib/testdata_importer.rb b/lib/testdata_importer.rb
--- a/lib/testdata_importer.rb
+++ b/lib/testdata_importer.rb
@@ -145,6 +145,8 @@
       @problem.description_filename = "#{@problem.name}.pdf"
       @problem.save
       return "\nProblem pdf imported from #{filename}."
+    else
+      return ""
     end
   end