diff --git a/lib/psych.rb b/lib/psych.rb
index 9b9ccc86..27aeff96 100644
--- a/lib/psych.rb
+++ b/lib/psych.rb
@@ -326,27 +326,7 @@ def self.unsafe_load yaml, legacy_filename = NOT_GIVEN, filename: nil, fallback:
   #   Psych.safe_load("---\n foo: bar")                         # => {"foo"=>"bar"}
   #   Psych.safe_load("---\n foo: bar", symbolize_names: true)  # => {:foo=>"bar"}
   #
-  def self.safe_load yaml, legacy_permitted_classes = NOT_GIVEN, legacy_permitted_symbols = NOT_GIVEN, legacy_aliases = NOT_GIVEN, legacy_filename = NOT_GIVEN, permitted_classes: [], permitted_symbols: [], aliases: false, filename: nil, fallback: nil, symbolize_names: false, freeze: false
-    if legacy_permitted_classes != NOT_GIVEN
-      warn_with_uplevel 'Passing permitted_classes with the 2nd argument of Psych.safe_load is deprecated. Use keyword argument like Psych.safe_load(yaml, permitted_classes: ...) instead.', uplevel: 1 if $VERBOSE
-      permitted_classes = legacy_permitted_classes
-    end
-
-    if legacy_permitted_symbols != NOT_GIVEN
-      warn_with_uplevel 'Passing permitted_symbols with the 3rd argument of Psych.safe_load is deprecated. Use keyword argument like Psych.safe_load(yaml, permitted_symbols: ...) instead.', uplevel: 1 if $VERBOSE
-      permitted_symbols = legacy_permitted_symbols
-    end
-
-    if legacy_aliases != NOT_GIVEN
-      warn_with_uplevel 'Passing aliases with the 4th argument of Psych.safe_load is deprecated. Use keyword argument like Psych.safe_load(yaml, aliases: ...) instead.', uplevel: 1 if $VERBOSE
-      aliases = legacy_aliases
-    end
-
-    if legacy_filename != NOT_GIVEN
-      warn_with_uplevel 'Passing filename with the 5th argument of Psych.safe_load is deprecated. Use keyword argument like Psych.safe_load(yaml, filename: ...) instead.', uplevel: 1 if $VERBOSE
-      filename = legacy_filename
-    end
-
+  def self.safe_load yaml, permitted_classes: [], permitted_symbols: [], aliases: false, filename: nil, fallback: nil, symbolize_names: false, freeze: false
     result = parse(yaml, filename: filename)
     return fallback unless result
 
diff --git a/test/psych/test_safe_load.rb b/test/psych/test_safe_load.rb
index d13ce7c7..b52d6048 100644
--- a/test/psych/test_safe_load.rb
+++ b/test/psych/test_safe_load.rb
@@ -31,8 +31,6 @@ def test_explicit_recursion
       x = []
       x << x
       assert_equal(x, Psych.safe_load(Psych.dump(x), permitted_classes: [], permitted_symbols: [], aliases: true))
-      # deprecated interface
-      assert_equal(x, Psych.safe_load(Psych.dump(x), [], [], true))
     end
 
     def test_permitted_symbol
@@ -48,9 +46,6 @@ def test_permitted_symbol
           permitted_symbols: [:foo]
         )
       )
-
-      # deprecated interface
-      assert_equal(:foo, Psych.safe_load(yml, [Symbol], [:foo]))
     end
 
     def test_symbol
@@ -61,17 +56,9 @@ def test_symbol
         Psych.safe_load '--- !ruby/symbol foo', permitted_classes: []
       end
 
-      # deprecated interface
-      assert_raise(Psych::DisallowedClass) do
-        Psych.safe_load '--- !ruby/symbol foo', []
-      end
-
       assert_safe_cycle :foo, permitted_classes: [Symbol]
       assert_safe_cycle :foo, permitted_classes: %w{ Symbol }
       assert_equal :foo, Psych.safe_load('--- !ruby/symbol foo', permitted_classes: [Symbol])
-
-      # deprecated interface
-      assert_equal :foo, Psych.safe_load('--- !ruby/symbol foo', [Symbol])
     end
 
     def test_foo
@@ -79,18 +66,10 @@ def test_foo
         Psych.safe_load '--- !ruby/object:Foo {}', permitted_classes: [Foo]
       end
 
-      # deprecated interface
-      assert_raise(Psych::DisallowedClass) do
-        Psych.safe_load '--- !ruby/object:Foo {}', [Foo]
-      end
-
       assert_raise(Psych::DisallowedClass) do
         assert_safe_cycle Foo.new
       end
       assert_kind_of(Foo, Psych.safe_load(Psych.dump(Foo.new), permitted_classes: [Foo]))
-
-      # deprecated interface
-      assert_kind_of(Foo, Psych.safe_load(Psych.dump(Foo.new), [Foo]))
     end
 
     X = Struct.new(:x)
@@ -122,27 +101,6 @@ def test_anon_struct
       end
     end
 
-    def test_deprecated_anon_struct
-      assert Psych.safe_load(<<-eoyml, [Struct, Symbol])
---- !ruby/struct
-  foo: bar
-                      eoyml
-
-      assert_raise(Psych::DisallowedClass) do
-        Psych.safe_load(<<-eoyml, [Struct])
---- !ruby/struct
-  foo: bar
-                      eoyml
-      end
-
-      assert_raise(Psych::DisallowedClass) do
-        Psych.safe_load(<<-eoyml, [Symbol])
---- !ruby/struct
-  foo: bar
-                      eoyml
-      end
-    end
-
     def test_safe_load_default_fallback
       assert_nil Psych.safe_load("")
     end
@@ -159,8 +117,6 @@ def test_safe_load_raises_on_bad_input
 
     def cycle object, permitted_classes: []
       Psych.safe_load(Psych.dump(object), permitted_classes: permitted_classes)
-      # deprecated interface test
-      Psych.safe_load(Psych.dump(object), permitted_classes)
     end
 
     def assert_safe_cycle object, permitted_classes: []