diff --git a/lib/zeitwerk/loader.rb b/lib/zeitwerk/loader.rb
index f5e7a37b..15de02ef 100644
--- a/lib/zeitwerk/loader.rb
+++ b/lib/zeitwerk/loader.rb
@@ -256,9 +256,8 @@ def unregister
     # The return value of this predicate is only meaningful if the loader has
     # scanned the file. This is the case in the spots where we use it.
     #
-    # @private
     # @sig (String) -> Boolean
-    def shadowed_file?(file)
+    internal def shadowed_file?(file)
       shadowed_files.member?(file)
     end
 
diff --git a/test/lib/zeitwerk/test_shadowed_files.rb b/test/lib/zeitwerk/test_shadowed_files.rb
index ab3498ca..5d79fb05 100644
--- a/test/lib/zeitwerk/test_shadowed_files.rb
+++ b/test/lib/zeitwerk/test_shadowed_files.rb
@@ -10,7 +10,7 @@ class TestShadowedFiles < LoaderTest
 
     files = [["x.rb", "X = 2"]]
     with_setup(files) do
-      assert loader.shadowed_file?(File.expand_path("x.rb"))
+      assert loader.__shadowed_file?(File.expand_path("x.rb"))
 
       assert_equal 1, ::X
       loader.reload
@@ -25,8 +25,8 @@ class TestShadowedFiles < LoaderTest
       loader.push_dir("b")
       loader.setup
 
-      assert !loader.shadowed_file?(File.expand_path("a/x.rb"))
-      assert loader.shadowed_file?(File.expand_path("b/x.rb"))
+      assert !loader.__shadowed_file?(File.expand_path("a/x.rb"))
+      assert loader.__shadowed_file?(File.expand_path("b/x.rb"))
 
       assert_equal 1, ::X
       loader.reload
@@ -40,8 +40,8 @@ class TestShadowedFiles < LoaderTest
       first_loader = new_loader(dirs: "a")
       second_loader = new_loader(dirs: "b")
 
-      assert !first_loader.shadowed_file?(File.expand_path("a/x.rb"))
-      assert second_loader.shadowed_file?(File.expand_path("b/x.rb"))
+      assert !first_loader.__shadowed_file?(File.expand_path("a/x.rb"))
+      assert second_loader.__shadowed_file?(File.expand_path("b/x.rb"))
 
       assert_equal 1, ::X
       second_loader.reload