5 files changed, 6 insertions, 6 deletions
diff --git a/test/fileutils/test_fileutils.rb b/test/fileutils/test_fileutils.rb
index b733488cf8..0834187b95 100644
--- a/test/fileutils/test_fileutils.rb
+++ b/test/fileutils/test_fileutils.rb
@@ -1093,7 +1093,7 @@ class TestFileUtils < Test::Unit::TestCase
     assert_output_lines([]) {
       touch 'tmp/b'
       # string input for group, -1 for user
-      chown -1, input_group_2, 'tmp/b'
+      chown(-1, input_group_2, 'tmp/b')
       assert_ownership_group @groups[1], 'tmp/b'
     }
   end if have_file_perm?
diff --git a/test/mkmf/test_framework.rb b/test/mkmf/test_framework.rb
index 48e8bf7213..3585f959f9 100644
--- a/test/mkmf/test_framework.rb
+++ b/test/mkmf/test_framework.rb
@@ -36,7 +36,7 @@ class TestMkmf
     end
 
     def test_different_name_header
-      bug8593 = '[ruby-core:55745] [Bug #8593]'
+      _bug8593 = '[ruby-core:55745] [Bug #8593]'
       create_framework("MkmfTest", "test_mkmf.h") do |fw, hdrname|
         assert(!have_framework(fw), MKMFLOG)
         assert(have_framework([fw, hdrname]), MKMFLOG)
diff --git a/test/strscan/test_stringscanner.rb b/test/strscan/test_stringscanner.rb
index be548d1938..e2e476630c 100644
--- a/test/strscan/test_stringscanner.rb
+++ b/test/strscan/test_stringscanner.rb
@@ -461,7 +461,7 @@ class TestStringScanner < Test::Unit::TestCase
     assert_equal true, s[4].tainted?
 
     s = StringScanner.new("foo bar baz")
-    s.scan /(?<a>\w+) (?<b>\w+) (\w+)/
+    s.scan(/(?<a>\w+) (?<b>\w+) (\w+)/)
     assert_equal 'foo', s[1]
     assert_equal 'bar', s[2]
     assert_nil s[3]
diff --git a/test/testunit/test_redefinition.rb b/test/testunit/test_redefinition.rb
index 4540461be1..ed11621351 100644
--- a/test/testunit/test_redefinition.rb
+++ b/test/testunit/test_redefinition.rb
@@ -2,8 +2,8 @@ require 'test/unit'
 
 class TestRedefinition < Test::Unit::TestCase
   def test_redefinition
-    assert_match /^test\/unit warning: method TestForTestRedefinition#test_redefinition is redefined$/,
-                 redefinition
+    assert_match(/^test\/unit warning: method TestForTestRedefinition#test_redefinition is redefined$/,
+                 redefinition)
   end
 
   def redefinition(*args)
diff --git a/test/webrick/test_httprequest.rb b/test/webrick/test_httprequest.rb
index 0ce6b4f40f..3a7e67579f 100644
--- a/test/webrick/test_httprequest.rb
+++ b/test/webrick/test_httprequest.rb
@@ -349,7 +349,7 @@ GET /
     l = msg.size
     req.continue
     assert_not_equal l, msg.size
-    assert_match /HTTP\/1.1 100 continue\r\n\r\n\z/, msg
+    assert_match(/HTTP\/1.1 100 continue\r\n\r\n\z/, msg)
     assert !req['expect']
   end