https://git.ruby-lang.org/ruby.git/commit/?id=da00243dfe

From da00243dfe745cba3b176112fe8245c23e6f1635 Mon Sep 17 00:00:00 2001
From: Peter Zhu <peter@p...>
Date: Sun, 31 Jul 2022 17:03:19 -0400
Subject: [DOC] Specify ways to run bootstrap tests

---
 doc/contributing/testing_ruby.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/doc/contributing/testing_ruby.md b/doc/contributing/testing_ruby.md
index ecdb152926..6247686efc 100644
--- a/doc/contributing/testing_ruby.md
+++ b/doc/contributing/testing_ruby.md
@@ -20,10 +20,11 @@ We can run any of the make scripts [in parallel](building_ruby.md#label-Running+ https://github.com/ruby/ruby/blob/trunk/doc/contributing/testing_ruby.md#L20
     make btest OPTS=-v
     ```
 
-    To run an individual bootstrap test, we can set the filename in the environment variable `BTESTS`:
+    To run individual bootstrap tests, we can either specify a list of filenames or use the `--sets` flag in the variable `BTESTS`:
 
     ```
-    make btest BTESTS=bootstraptest/test_gc.rb
+    make btest BTESTS="bootstraptest/test_fork.rb bootstraptest/tes_gc.rb"
+    make btest BTESTS="--sets=fork,gc"
     ```
 
     If we want to run the bootstrap test suite on Ruby (not Miniruby), we can use:
-- 
cgit v1.2.1


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