diff --git a/Tests/TaggedNodeCorpusRoundTripTests.swift b/Tests/TaggedNodeCorpusRoundTripTests.swift
index 4aca297..0235e63 100644
--- a/Tests/TaggedNodeCorpusRoundTripTests.swift
+++ b/Tests/TaggedNodeCorpusRoundTripTests.swift
@@ -31,7 +31,13 @@ struct TaggedNodeCorpusRoundTripTests {
         let order = names.indices.sorted { names[$0] < names[$1] }
         for index in order {
             let url = urls[index]
-            let source = try String(contentsOf: url, encoding: .utf8)
+            // `String(contentsOf: url, encoding:)` itself hit the same NSURL/URL confusion on
+            // this toolchain regardless of how `url` was obtained (a bare `for url in urls` with
+            // no sort at all reproduces it too). `contentsOfFile:` takes a `String` path -- a
+            // type this toolchain's Foundation does not have two conflicting URL/NSURL overloads
+            // for -- sidestepping the ambiguity at its actual point of failure instead of
+            // upstream of it.
+            let source = try String(contentsOfFile: url.path, encoding: .utf8)
             let parsed: PureYAML.Tagged.Node
             do {
                 parsed = try PureYAML.parseTagged(source)