1 files changed, 5 insertions, 2 deletions
diff --git a/test/io/wait/test_io_wait.rb b/test/io/wait/test_io_wait.rb
index 876fbb87de..a35caaa24a 100644
--- a/test/io/wait/test_io_wait.rb
+++ b/test/io/wait/test_io_wait.rb
@@ -24,6 +24,7 @@ class TestIOWait < Test::Unit::TestCase
   def test_nread
     assert_equal 0, @r.nread
     @w.syswrite "."
+    sleep 0.1
     assert_equal 1, @r.nread
   end
 
@@ -34,9 +35,10 @@ class TestIOWait < Test::Unit::TestCase
   end
 
   def test_ready?
-    refute @r.ready?
+    refute @r.ready?, "shouldn't ready, but ready"
     @w.syswrite "."
-    assert @r.ready?
+    sleep 0.1
+    assert @r.ready?, "should ready, but not"
   end
 
   def test_buffered_ready?
@@ -48,6 +50,7 @@ class TestIOWait < Test::Unit::TestCase
   def test_wait
     assert_nil @r.wait(0)
     @w.syswrite "."
+    sleep 0.1
     assert_equal @r, @r.wait(0)
   end