1 files changed, 3 insertions, 10 deletions
diff --git a/test/ruby/test_sleep.rb b/test/ruby/test_sleep.rb
index a2e50739fb..29490a7a18 100644
--- a/test/ruby/test_sleep.rb
+++ b/test/ruby/test_sleep.rb
@@ -4,17 +4,10 @@ require 'etc'
 class TestSleep < Test::Unit::TestCase
   def test_sleep_5sec
     GC.disable
-    start = Time.now
+    start = Process.clock_gettime(Process::CLOCK_MONOTONIC)
     sleep 5
-    slept = Time.now-start
-    bottom =
-      case RUBY_PLATFORM
-      when /linux/
-        4.98 if (Etc.uname[:release].split('.').map(&:to_i)<=>[2,6,18]) <= 0
-      when /mswin|mingw/
-        4.98
-      end
-    bottom ||= 5.0
+    slept = Process.clock_gettime(Process::CLOCK_MONOTONIC) - start
+    bottom = 5.0
     assert_operator(slept, :>=, bottom)
     assert_operator(slept, :<=, 6.0, "[ruby-core:18015]: longer than expected")
   ensure