diff --git a/Tests/TaggedNodeCorpusRoundTripTests.swift b/Tests/TaggedNodeCorpusRoundTripTests.swift
index 3fdcef5..2f571f3 100644
--- a/Tests/TaggedNodeCorpusRoundTripTests.swift
+++ b/Tests/TaggedNodeCorpusRoundTripTests.swift
@@ -19,14 +19,12 @@ struct TaggedNodeCorpusRoundTripTests {
         ))
         var accepted = 0
         var rejected = 0
-        /// `URL.lastPathComponent` is `String` on Darwin's Foundation but `String?` on this
-        /// toolchain's swift-corelibs-foundation; the explicit `as String?` upcast/coercion makes
-        /// both platforms produce a uniform `String?` here so `?? ""` compiles identically either
-        /// way, rather than picking one platform's non-optional type and breaking the other.
-        func name(_ url: URL) -> String {
-            (url.lastPathComponent as String?) ?? ""
-        }
-        for url in urls.sorted(by: { name($0) < name($1) }) {
+        // `URL.lastPathComponent` is `String` on Darwin's Foundation but `String?` on this
+        // toolchain's swift-corelibs-foundation. Left deliberately untyped (no explicit `URL`
+        // parameter anywhere below) since a fixed `Bundle.module.urls(...)` result element type
+        // also varies across those two Foundations; the `as String?` coercion after the property
+        // access, not before, is what stays valid on both.
+        for url in urls.sorted(by: { ($0.lastPathComponent as String? ?? "") < ($1.lastPathComponent as String? ?? "") }) {
             let source = try String(contentsOf: url, encoding: .utf8)
             let parsed: PureYAML.Tagged.Node
             do {
@@ -41,11 +39,11 @@ struct TaggedNodeCorpusRoundTripTests {
             do {
                 reparsed = try PureYAML.parseTagged(dumped)
             } catch {
-                Issue.record("\(name(url)): dump produced unparseable YAML: \(error)")
+                Issue.record("\(url.lastPathComponent as String? ?? ""): dump produced unparseable YAML: \(error)")
                 continue
             }
             if let detail = firstDivergence(parsed, reparsed, path: "$") {
-                Issue.record("\(name(url)): \(detail)")
+                Issue.record("\(url.lastPathComponent as String? ?? ""): \(detail)")
             }
         }
         #expect(accepted > 0)