diff --git a/test/irb/test_context.rb b/test/irb/test_context.rb
index fa2432b3f3..469599c11b 100644
--- a/test/irb/test_context.rb
+++ b/test/irb/test_context.rb
@@ -55,6 +55,7 @@ module TestIRB
     end
 
     def test_eval_input
+      verbose, $VERBOSE = $VERBOSE, nil
       input = TestInputMethod.new([
         "raise 'Foo'\n",
         "_\n",
@@ -71,6 +72,8 @@ module TestIRB
                            :*, /0$/,
                            :*, /0$/,
                            /\s*/], out)
+    ensure
+      $VERBOSE = verbose
     end
   end
 end
diff --git a/test/irb/test_raise_no_backtrace_exception.rb b/test/irb/test_raise_no_backtrace_exception.rb
index d3882a427c..9d000d5d4e 100644
--- a/test/irb/test_raise_no_backtrace_exception.rb
+++ b/test/irb/test_raise_no_backtrace_exception.rb
@@ -4,7 +4,7 @@ require 'test/unit'
 module TestIRB
   class TestRaiseNoBacktraceException < Test::Unit::TestCase
     def test_raise_exception
-      status = assert_in_out_err(%w[-rirb -e IRB.start(__FILE__) -- -f --], <<-IRB, /Exception: foo/, [])
+      status = assert_in_out_err(%w[-rirb -W1 -e IRB.start(__FILE__) -- -f --], <<-IRB, /Exception: foo/, [])
       e = Exception.new("foo")
       def e.backtrace; nil; end
       raise e