diff --git a/bin/dot b/bin/dot
deleted file mode 100755
index 343d00e31e..0000000000
--- a/bin/dot
+++ /dev/null
@@ -1,21 +0,0 @@
-#!/usr/bin/env ruby
-# frozen_string_literal: true
-
-$:.unshift(File.expand_path("../lib", __dir__))
-require "prism"
-
-result =
-  if ARGV[0] == "-e"
-    Prism.parse(ARGV[1])
-  else
-    Prism.parse_file(ARGV[0] || "test.rb")
-  end
-
-File.write(
-  "out.svg",
-  IO.popen("dot -Tsvg", "w+") do |file|
-    file.write(result.value.to_dot)
-    file.close_write
-    file.read
-  end
-)
diff --git a/test/prism/errors_test.rb b/test/prism/errors_test.rb
index d756c1cb0d..5d4b95a224 100644
--- a/test/prism/errors_test.rb
+++ b/test/prism/errors_test.rb
@@ -1676,100 +1676,6 @@ module Prism
       ], compare_ripper: false # Ripper does not check 'void value expression'.
     end
 
-    def test_void_value_expression_in_arguments
-      source = <<~RUBY
-        foo(return)
-        foo(1, return)
-        foo(*return)
-        foo(**return)
-        foo(&return)
-        foo(return => 1)
-        foo(:a => return)
-        foo(a: return)
-      RUBY
-      message = 'Unexpected void value expression'
-      assert_errors expression(source), source, [
-        [message, 4..10],
-        [message, 19..25],
-        [message, 32..38],
-        [message, 46..52],
-        [message, 59..65],
-        [message, 71..77],
-        [message, 94..100],
-        [message, 109..115],
-      ], compare_ripper: false # Ripper does not check 'void value expression'.
-    end
-
-    def test_void_value_expression_in_hash
-      source = <<~RUBY
-        { return => 1 }
-        { 1 => return }
-        { a: return }
-        { **return }
-      RUBY
-      message = 'Unexpected void value expression'
-      assert_errors expression(source), source, [
-        [message, 2..8],
-        [message, 23..29],
-        [message, 37..43],
-        [message, 50..56],
-      ], compare_ripper: false # Ripper does not check 'void value expression'.
-    end
-
-    def test_void_value_expression_in_arguments
-      source = <<~RUBY
-        foo(return)
-        foo(1, return)
-        foo(*return)
-        foo(**return)
-        foo(&return)
-        foo(return => 1)
-        foo(:a => return)
-        foo(a: return)
-      RUBY
-      message = 'Unexpected void value expression'
-      assert_errors expression(source), source, [
-        [message, 4..10],
-        [message, 19..25],
-        [message, 32..38],
-        [message, 46..52],
-        [message, 59..65],
-        [message, 71..77],
-        [message, 94..100],
-        [message, 109..115],
-      ], compare_ripper: false # Ripper does not check 'void value expression'.
-    end
-
-    def test_void_value_expression_in_unary_call
-      source = <<~RUBY
-        +(return)
-        not return
-      RUBY
-      message = 'Unexpected void value expression'
-      assert_errors expression(source), source, [
-        [message, 2..8],
-        [message, 14..20],
-      ], compare_ripper: false # Ripper does not check 'void value expression'.
-    end
-
-    def test_void_value_expression_in_binary_call
-      source = <<~RUBY
-        1 + (return)
-        (return) + 1
-        1 and (return)
-        (return) and 1
-        1 or (return)
-        (return) or 1
-      RUBY
-      message = 'Unexpected void value expression'
-      assert_errors expression(source), source, [
-        [message, 5..11],
-        [message, 14..20],
-        [message, 42..48],
-        [message, 71..77],
-      ], compare_ripper: false # Ripper does not check 'void value expression'.
-    end
-
     private
 
     def assert_errors(expected, source, errors, compare_ripper: RUBY_ENGINE == "ruby")