1 files changed, 0 insertions, 47 deletions
diff --git a/test/csv/interface/test_delegation.rb b/test/csv/interface/test_delegation.rb
deleted file mode 100644
index 349257633b..0000000000
--- a/test/csv/interface/test_delegation.rb
+++ /dev/null
@@ -1,47 +0,0 @@
-# frozen_string_literal: false
-
-require_relative "../helper"
-
-class TestCSVInterfaceDelegation < Test::Unit::TestCase
-  class TestStringIO < self
-    def setup
-      @csv = CSV.new("h1,h2")
-    end
-
-    def test_flock
-      assert_raise(NotImplementedError) do
-        @csv.flock(File::LOCK_EX)
-      end
-    end
-
-    def test_ioctl
-      assert_raise(NotImplementedError) do
-        @csv.ioctl(0)
-      end
-    end
-
-    def test_stat
-      assert_raise(NotImplementedError) do
-        @csv.stat
-      end
-    end
-
-    def test_to_i
-      assert_raise(NotImplementedError) do
-        @csv.to_i
-      end
-    end
-
-    def test_binmode?
-      assert_equal(false, @csv.binmode?)
-    end
-
-    def test_path
-      assert_equal(nil, @csv.path)
-    end
-
-    def test_to_io
-      assert_instance_of(StringIO, @csv.to_io)
-    end
-  end
-end