1 files changed, 5 insertions, 5 deletions
diff --git a/test/ut_eof.rb b/test/ut_eof.rb
index bd62fd50..cf1f2d42 100644
--- a/test/ut_eof.rb
+++ b/test/ut_eof.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 
 if defined?(OpenSSL)
@@ -18,12 +18,12 @@ module OpenSSL::TestEOF
       assert_nil(f.read(1))
     }
     open_file("") {|f|
-      s = "x"
+      s = +"x"
       assert_equal("", f.read(nil, s))
       assert_equal("", s)
     }
     open_file("") {|f|
-      s = "x"
+      s = +"x"
       assert_nil(f.read(10, s))
       assert_equal("", s)
     }
@@ -75,12 +75,12 @@ module OpenSSL::TestEOF
       assert_equal("", f.read(0))
     }
     open_file("a") {|f|
-      s = "x"
+      s = +"x"
       assert_equal("a", f.read(nil, s))
       assert_equal("a", s)
     }
     open_file("a") {|f|
-      s = "x"
+      s = +"x"
       assert_equal("a", f.read(10, s))
       assert_equal("a", s)
     }