diff --git a/examples/Rakefile b/examples/Rakefile
index b55c8f0..74b9638 100644
--- a/examples/Rakefile
+++ b/examples/Rakefile
@@ -131,7 +131,7 @@ yaml.files = [{
               }]
 recipes.push(yaml)
 recipe_hooks["yaml"] = lambda do |recipe|
-  expected = "-L" + File.join(recipe.path, "lib")
+  expected = "-L" + MiniPortile.native_path(File.join(recipe.path, "lib"))
   $LDFLAGS.split.include?(expected) or raise(<<~MSG)
     assertion failed: LDFLAGS not updated correctly:
     #{$LDFLAGS}
diff --git a/lib/mini_portile2/mini_portile.rb b/lib/mini_portile2/mini_portile.rb
index e16e02a..795435f 100644
--- a/lib/mini_portile2/mini_portile.rb
+++ b/lib/mini_portile2/mini_portile.rb
@@ -76,6 +76,24 @@ def self.target_cpu
     RbConfig::CONFIG['target_cpu']
   end
 
+  def self.native_path(path)
+    path = File.expand_path(path)
+    if File::ALT_SEPARATOR
+      path.tr(File::SEPARATOR, File::ALT_SEPARATOR)
+    else
+      path
+    end
+  end
+
+  def self.posix_path(path)
+    path = File.expand_path(path)
+    if File::ALT_SEPARATOR
+      "/" + path.tr(File::ALT_SEPARATOR, File::SEPARATOR).tr(":", File::SEPARATOR)
+    else
+      path
+    end
+  end
+
   def initialize(name, version, **kwargs)
     @name = name
     @version = version
@@ -240,7 +258,7 @@ def activate
     end
 
     if set_ldflags && File.exist?(lib_path)
-      full_lib_path = File.expand_path(lib_path)
+      full_lib_path = native_path(lib_path)
       flag = "-L#{full_lib_path}"
 
       # rely on LDFLAGS when cross-compiling
@@ -278,21 +296,11 @@ def make_cmd
   private
 
   def native_path(path)
-    path = File.expand_path(path)
-    if File::ALT_SEPARATOR
-      path.tr(File::SEPARATOR, File::ALT_SEPARATOR)
-    else
-      path
-    end
+    MiniPortile.native_path(path)
   end
 
   def posix_path(path)
-    path = File.expand_path(path)
-    if File::ALT_SEPARATOR
-      "/" + path.tr(File::ALT_SEPARATOR, File::SEPARATOR).tr(":", File::SEPARATOR)
-    else
-      path
-    end
+    MiniPortile.posix_path(path)
   end
 
   def tmp_path
diff --git a/test/test_activate.rb b/test/test_activate.rb
index 84c3f96..9362c85 100644
--- a/test/test_activate.rb
+++ b/test/test_activate.rb
@@ -31,78 +31,78 @@ def teardown
 
   def test_PATH_env_var_when_bin_does_not_exist
     refute(Dir.exist?(bin_path))
-    refute(path_elements('PATH').include?(bin_path))
+    refute_includes(path_elements('PATH'), bin_path)
 
     recipe.activate
 
-    refute(path_elements('PATH').include?(bin_path))
+    refute_includes(path_elements('PATH'), bin_path)
   end
 
   def test_PATH_env_var_when_bin_exists
     FileUtils.mkdir_p(bin_path)
-    refute(path_elements('PATH').include?(bin_path))
+    refute_includes(path_elements('PATH'), bin_path)
 
     recipe.activate
 
-    assert(path_elements('PATH').include?(bin_path))
+    assert_includes(path_elements('PATH'), bin_path)
   end
 
   def test_CPATH_env_var_when_include_does_not_exist
     refute(Dir.exist?(include_path))
-    refute(path_elements('CPATH').include?(include_path))
+    refute_includes(path_elements('CPATH'), include_path)
 
     recipe.activate
 
-    refute(path_elements('CPATH').include?(include_path))
+    refute_includes(path_elements('CPATH'), include_path)
   end
 
   def test_CPATH_env_var_when_include_exists
     FileUtils.mkdir_p(include_path)
-    refute(path_elements('CPATH').include?(include_path))
+    refute_includes(path_elements('CPATH'), include_path)
 
     recipe.activate
 
-    assert(path_elements('CPATH').include?(include_path))
+    assert_includes(path_elements('CPATH'), include_path)
   end
 
   def test_LIBRARY_PATH_env_var_when_lib_does_not_exist
     refute(Dir.exist?(lib_path))
-    refute(path_elements('LIBRARY_PATH').include?(lib_path))
+    refute_includes(path_elements('LIBRARY_PATH'), lib_path)
 
     recipe.activate
 
-    refute(path_elements('LIBRARY_PATH').include?(lib_path))
+    refute_includes(path_elements('LIBRARY_PATH'), lib_path)
   end
 
   def test_LIBRARY_PATH_env_var_when_lib_exists
     FileUtils.mkdir_p(lib_path)
-    refute(path_elements('LIBRARY_PATH').include?(lib_path))
+    refute_includes(path_elements('LIBRARY_PATH'), lib_path)
 
     recipe.activate
 
-    assert(path_elements('LIBRARY_PATH').include?(lib_path))
+    assert_includes(path_elements('LIBRARY_PATH'), lib_path)
   end
 
   def test_LDFLAGS_env_var_when_not_cross_compiling
     FileUtils.mkdir_p(lib_path)
     assert_equal(recipe.host, recipe.original_host) # assert on setup)
 
-    refute(flag_elements('LDFLAGS').include?("-L#{lib_path}"))
+    refute_includes(flag_elements('LDFLAGS'), "-L#{lib_path}")
 
     recipe.activate
 
-    refute(flag_elements('LDFLAGS').include?("-L#{lib_path}"))
+    refute_includes(flag_elements('LDFLAGS'), "-L#{lib_path}")
   end
 
   def test_LDFLAGS_env_var_when_cross_compiling
     recipe.host = recipe.original_host + "-x" # make them not-equal
     FileUtils.mkdir_p(lib_path)
 
-    refute(flag_elements('LDFLAGS').include?("-L#{lib_path}"))
+    refute_includes(flag_elements('LDFLAGS'), "-L#{lib_path}")
 
     recipe.activate
 
-    assert(flag_elements('LDFLAGS').include?("-L#{lib_path}"))
+    assert_includes(flag_elements('LDFLAGS'), "-L#{lib_path}")
   end
 
   def test_LDFLAGS_global_when_not_set
@@ -120,7 +120,7 @@ def test_LDFLAGS_global_when_set
 
     recipe.activate
 
-    assert($LDFLAGS.split.include?("-L#{lib_path}"))
+    assert_includes($LDFLAGS.split, "-L#{lib_path}")
   end
 
   def test_LDFLAGS_global_when_set_but_option_is_turned_off
@@ -130,7 +130,7 @@ def test_LDFLAGS_global_when_set_but_option_is_turned_off
     recipe.set_ldflags = false
     recipe.activate
 
-    refute($LDFLAGS.split.include?("-L#{lib_path}"))
+    refute_includes($LDFLAGS.split, "-L#{lib_path}")
   end
 
   private
@@ -144,14 +144,14 @@ def flag_elements(varname)
   end
 
   def bin_path
-    File.join(recipe.path, "bin")
+    MiniPortile.native_path(File.join(recipe.path, "bin"))
   end
 
   def include_path
-    File.join(recipe.path, "include")
+    MiniPortile.native_path(File.join(recipe.path, "include"))
   end
 
   def lib_path
-    File.join(recipe.path, "lib")
+    MiniPortile.native_path(File.join(recipe.path, "lib"))
   end
 end