diff --git a/docs/TESTING-SUITES.md b/docs/TESTING-SUITES.md
index 5edcabce8..bf16eb078 100644
--- a/docs/TESTING-SUITES.md
+++ b/docs/TESTING-SUITES.md
@@ -72,6 +72,6 @@ Each matrix cell runs `unit`, `integration`, and `security` on every PR. `instal
 ## Best practices for forward-compat (Node 24/26)
 
 - Use `process.execPath` when spawning Node in tests so each matrix lane exercises the lane's Node version.
-- Avoid exact stack-trace or error-message prose assertions. Assert `err.code`, structured JSON, or a stable message substring instead — Node minor releases routinely tweak error wording.
+- Avoid stack-trace or error-message prose assertions. Assert `err.code`, structured JSON fields, or enums — Node minor releases routinely tweak error wording.
 - Prefer `node:test`, `node:assert/strict`, and `node:test` mocks. No external test frameworks.
 - Coverage uses `c8` and propagates `NODE_V8_COVERAGE` through the harness's child process.
diff --git a/scripts/run-tests.cjs b/scripts/run-tests.cjs
index e38f47f50..1e065d986 100644
--- a/scripts/run-tests.cjs
+++ b/scripts/run-tests.cjs
@@ -103,7 +103,7 @@ function main() {
     .sort();
 
   if (allFiles.length === 0) {
-    console.error('No test files found in tests/');
+    console.error(`No test files found in ${testDir}`);
     process.exit(1);
   }