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-rw-r--r--bootstraptest/test_ractor.rb2
-rw-r--r--ractor.rb2
2 files changed, 2 insertions, 2 deletions
diff --git a/bootstraptest/test_ractor.rb b/bootstraptest/test_ractor.rb
index a1169f9d29..e2a3e8dd5b 100644
--- a/bootstraptest/test_ractor.rb
+++ b/bootstraptest/test_ractor.rb
@@ -316,7 +316,7 @@ assert_equal 30.times.map { 'ok' }.to_s, %q{
} unless (ENV.key?('TRAVIS') && ENV['TRAVIS_CPU_ARCH'] == 'arm64') # https://bugs.ruby-lang.org/issues/17878
# Exception for empty select
-assert_match /specify at least one ractor/, %q{
+assert_match /specify at least one Ractor::Port or Ractor/, %q{
begin
Ractor.select
rescue ArgumentError => e
diff --git a/ractor.rb b/ractor.rb
index 1364458802..0002eece2c 100644
--- a/ractor.rb
+++ b/ractor.rb
@@ -267,7 +267,7 @@ class Ractor
#
# TBD
def self.select(*ports)
- raise ArgumentError, 'specify at least one ractor or `yield_value`' if ports.empty?
+ raise ArgumentError, 'specify at least one Ractor::Port or Ractor' if ports.empty?
monitors = {} # Ractor::Port => Ractor