diff --git a/lib/rake.rb b/lib/rake.rb
index f1c6f299d..681575906 100644
--- a/lib/rake.rb
+++ b/lib/rake.rb
@@ -33,8 +33,6 @@ module Rake; end
 
 require_relative "rake/ext/string"
 
-require_relative "rake/win32"
-
 require_relative "rake/linked_list"
 require_relative "rake/cpu_counter"
 require_relative "rake/scope"
diff --git a/lib/rake/application.rb b/lib/rake/application.rb
index 39ee5e191..a068a9582 100644
--- a/lib/rake/application.rb
+++ b/lib/rake/application.rb
@@ -7,7 +7,6 @@
 require_relative "thread_pool"
 require_relative "thread_history_display"
 require_relative "trace_output"
-require_relative "win32"
 
 module Rake
 
@@ -384,12 +383,11 @@ def dynamic_width_tput # :nodoc:
     end
 
     def unix? # :nodoc:
-      RbConfig::CONFIG["host_os"] =~
-        /(aix|darwin|linux|(net|free|open)bsd|cygwin|solaris|irix|hpux)/i
+      Rake.unix?
     end
 
     def windows? # :nodoc:
-      Win32.windows?
+      Rake.windows?
     end
 
     def truncate(string, width) # :nodoc:
diff --git a/lib/rake/rake_module.rb b/lib/rake/rake_module.rb
index 03c295624..7b37af358 100644
--- a/lib/rake/rake_module.rb
+++ b/lib/rake/rake_module.rb
@@ -14,6 +14,17 @@ def application=(app)
       @application = app
     end
 
+    # True if running on a Windows system.
+    def windows?
+      RbConfig::CONFIG["host_os"] =~ %r!(msdos|mswin|djgpp|mingw|[Ww]indows)!
+    end
+
+    # True if running on a Unix system.
+    def unix?
+      RbConfig::CONFIG["host_os"] =~
+        /(aix|darwin|linux|(net|free|open)bsd|cygwin|solaris|irix|hpux)/i
+    end
+
     def suggested_thread_count # :nodoc:
       @cpu_count ||= Rake::CpuCounter.count
       @cpu_count + 4
diff --git a/lib/rake/win32.rb b/lib/rake/win32.rb
deleted file mode 100644
index 5cccbde93..000000000
--- a/lib/rake/win32.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-# frozen_string_literal: true
-require "rbconfig"
-
-module Rake
-  # Win 32 interface methods for Rake. Windows specific functionality
-  # will be placed here to collect that knowledge in one spot.
-  module Win32 # :nodoc: all
-
-    class << self
-      # True if running on a windows system.
-      def windows?
-        RbConfig::CONFIG["host_os"] =~ %r!(msdos|mswin|djgpp|mingw|[Ww]indows)!
-      end
-    end
-
-  end
-end
diff --git a/rake.gemspec b/rake.gemspec
index dbc1794c8..893fa741f 100644
--- a/rake.gemspec
+++ b/rake.gemspec
@@ -90,7 +90,6 @@ Gem::Specification.new do |s|
     "lib/rake/thread_pool.rb",
     "lib/rake/trace_output.rb",
     "lib/rake/version.rb",
-    "lib/rake/win32.rb",
     "rake.gemspec"
   ]
   s.bindir = "exe"
diff --git a/test/test_rake.rb b/test/test_rake.rb
index a6d08fd35..617da2585 100644
--- a/test/test_rake.rb
+++ b/test/test_rake.rb
@@ -38,4 +38,11 @@ def test_original_dir_reports_current_dir
     assert_equal @tempdir, Rake.original_dir
   end
 
+  def test_platform_detection
+    # ensure that Rake's platform detection logic
+    # is mutually exclusive, and doesn't claim to
+    # be both Windows and Unix at the same time
+    assert ! (Rake.windows? && Rake.unix?)
+  end
+
 end
diff --git a/test/test_rake_application.rb b/test/test_rake_application.rb
index e661a3c3b..865872d3a 100644
--- a/test/test_rake_application.rb
+++ b/test/test_rake_application.rb
@@ -419,8 +419,18 @@ def test_terminal_columns
     end
   end
 
-  def test_windows
-    assert ! (@app.windows? && @app.unix?)
+  if Rake.unix?
+    def test_unix_platform_detection
+      assert @app.unix?
+      refute @app.windows?
+    end
+  end
+
+  if Rake.windows?
+    def test_windows_platform_detection
+      assert @app.windows?
+      refute @app.unix?
+    end
   end
 
   def test_loading_imports
diff --git a/test/test_rake_directory_task.rb b/test/test_rake_directory_task.rb
index 628344a1b..d7060f769 100644
--- a/test/test_rake_directory_task.rb
+++ b/test/test_rake_directory_task.rb
@@ -27,13 +27,15 @@ def test_directory
     refute File.exist?("a/b/c")
   end
 
-  def test_directory_colon
-    directory "a:b"
+  if Rake.unix?
+    def test_directory_colon
+      directory "a:b"
 
-    assert_equal FileCreationTask, Task["a:b"].class
-  end unless Rake::Win32.windows?
+      assert_equal FileCreationTask, Task["a:b"].class
+    end
+  end
 
-  if Rake::Win32.windows?
+  if Rake.windows?
     def test_directory_win32
       desc "WIN32 DESC"
       directory "c:/a/b/c"
diff --git a/test/test_rake_file_list.rb b/test/test_rake_file_list.rb
index 45f695d4f..64cf4bdb6 100644
--- a/test/test_rake_file_list.rb
+++ b/test/test_rake_file_list.rb
@@ -349,8 +349,8 @@ def test_string_ext
     assert_equal ".one", ".one".ext
     assert_equal ".", ".".ext("c")
     assert_equal "..", "..".ext("c")
-    # These only need to work in windows
-    if Rake::Win32.windows?
+    # These only need to work on Windows
+    if Rake.windows?
       assert_equal "one.x\\two.net", "one.x\\two.c".ext(".net")
       assert_equal "one.x\\two.net", "one.x\\two".ext(".net")
     end