diff --git a/crates/sylpheed-formats/tests/corpus_report.rs b/crates/sylpheed-formats/tests/corpus_report.rs
index 0e071da6..cc6221f6 100644
--- a/crates/sylpheed-formats/tests/corpus_report.rs
+++ b/crates/sylpheed-formats/tests/corpus_report.rs
@@ -58,7 +58,7 @@ fn resolve(
         // so the suites run because of this machine's directory layout — a
         // property invisible in the command and in the output.
         return (
-            "PRESENT via the HARDCODED fallback (not ${env})".replace("${env}", env),
+            format!("PRESENT via the HARDCODED fallback, NOT ${env}"),
             Some(p),
         );
     }