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-rw-r--r--test/rubygems/coverage_setup.rb9
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diff --git a/test/rubygems/coverage_setup.rb b/test/rubygems/coverage_setup.rb
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+# frozen_string_literal: true
+
+# This file is loaded via -r flag BEFORE rubygems to enable coverage tracking
+# of rubygems boot files. It must be used with --disable-gems and -Ilib
+# so that Coverage.start runs before rubygems is loaded.
+
+require "coverage"
+Coverage.start(lines: true)
+require "rubygems"