3 files changed, 23 insertions, 3 deletions
diff --git a/test/mrbtest.rake b/test/mrbtest.rake
index e8eb6addd..c28cf3577 100644
--- a/test/mrbtest.rake
+++ b/test/mrbtest.rake
@@ -31,15 +31,15 @@ MRuby.each_target do
   end
 
   file ass_lib => ass_c
-  file ass_c => "#{current_dir}/assert.rb" do |t|
+  file ass_c => ["#{current_dir}/assert.rb", __FILE__] do |t|
     FileUtils.mkdir_p File.dirname t.name
     open(t.name, 'w') do |f|
-      mrbc.run f, [t.prerequisites], 'mrbtest_assert_irep'
+      mrbc.run f, [t.prerequisites.first], 'mrbtest_assert_irep'
     end
   end
 
   file mlib => clib
-  file clib => [mrbcfile, init] + mrbs do |t|
+  file clib => [mrbcfile, init, __FILE__] + mrbs do |t|
     _pp "GEN", "*.rb", "#{clib.relative_path}"
     FileUtils.mkdir_p File.dirname(clib)
     open(clib, 'w') do |f|
diff --git a/test/t/nomethoderror.rb b/test/t/nomethoderror.rb
index 561e545f9..709d31165 100644
--- a/test/t/nomethoderror.rb
+++ b/test/t/nomethoderror.rb
@@ -11,3 +11,16 @@ end
 assert('NoMethodError superclass', '15.2.32.2') do
   assert_equal NameError, NoMethodError.superclass
 end
+
+assert('NoMethodError#args', '15.2.32.2.1') do
+  a = NoMethodError.new 'test', :test, [1, 2]
+  assert_equal [1, 2], a.args
+
+  assert_nothing_raised do
+    begin
+      doesNotExistAsAMethodNameForVerySure 3, 1, 4
+    rescue NoMethodError => e
+      assert_equal [3, 1, 4], e.args
+    end
+  end
+end
diff --git a/test/t/string.rb b/test/t/string.rb
index 5ecb51530..00e98f671 100644
--- a/test/t/string.rb
+++ b/test/t/string.rb
@@ -320,6 +320,13 @@ assert('String#replace', '15.2.10.5.28') do
   b.replace(c);
   c.replace(b);
   assert_equal c, b
+
+  # shared string
+  s = "foo" * 100
+  a = s[10, 90]                # create shared string
+  assert_equal("", s.replace(""))    # clear
+  assert_equal("", s)          # s is cleared
+  assert_not_equal("", a)      # a should not be affected
 end
 
 assert('String#reverse', '15.2.10.5.29') do