diff --git a/test/logger/test_logger.rb b/test/logger/test_logger.rb
index ce3952352c..628da99447 100644
--- a/test/logger/test_logger.rb
+++ b/test/logger/test_logger.rb
@@ -121,6 +121,7 @@ class TestLogger < Test::Unit::TestCase
   end
 
   def test_datetime_format
+    verbose, $VERBOSE = $VERBOSE, false
     dummy = STDERR
     logger = Logger.new(dummy)
     log = log_add(logger, INFO, "foo")
@@ -131,6 +132,8 @@ class TestLogger < Test::Unit::TestCase
     logger.datetime_format = ""
     log = log_add(logger, INFO, "foo")
     assert_match(/^$/, log.datetime)
+  ensure
+    $VERBOSE = verbose
   end
 
   def test_formatter