only include lib in $LOAD_PATH if not included yet

pvdb · pvdb · commit 58e1eac00afb · 2025-07-19T08:42:04.000+01:00
diff --git a/test/helper.rb b/test/helper.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
-$:.unshift File.expand_path("../../lib", __FILE__)
+
+lib = File.expand_path("../../lib", __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 
 begin
   if ENV["COVERALLS"]
