diff --git a/benchmarks/loc.js b/benchmarks/loc.js
index 3640fa0..93e13dd 100644
--- a/benchmarks/loc.js
+++ b/benchmarks/loc.js
@@ -4,7 +4,9 @@
 module.exports = (output) => {
   const text = String(output || '');
   const blocks = [...text.matchAll(/```[a-zA-Z0-9_+-]*\n([\s\S]*?)```/g)].map((m) => m[1]);
-  const code = blocks.length ? blocks.join('\n') : text;
+  // Drop /* ... */ block comments before counting; the line filter below only
+  // caught `*`-aligned JSDoc, so plain block comments were miscounted as code.
+  const code = (blocks.length ? blocks.join('\n') : text).replace(/\/\*[\s\S]*?\*\//g, '');
   const loc = code
     .split('\n')
     .map((l) => l.trim())
diff --git a/benchmarks/loc.test.js b/benchmarks/loc.test.js
new file mode 100644
index 0000000..de30281
--- /dev/null
+++ b/benchmarks/loc.test.js
@@ -0,0 +1,22 @@
+// Regression guard for loc.js comment handling. Run: node loc.test.js
+const assert = require('assert');
+const loc = require('./loc.js');
+
+const score = (src) => loc(src).score;
+
+let pass = 0;
+const cases = [
+  // /* ... */ block comments must not count as code, whether or not the
+  // continuation lines are *-aligned (the old filter only caught JSDoc style).
+  ['plain block comment not counted', score('```js\nfunction f() {\n  /* explain\n     the rest */\n  return 1;\n}\n```'), 3],
+  ['jsdoc block comment not counted', score('```js\nfunction g() {\n  /*\n   * explain\n   */\n  return 2;\n}\n```'), 3],
+  ['inline block comment keeps its code line', score('```js\nconst x = 1; /* note */\nconst y = 2;\n```'), 2],
+  ['line comments still stripped', score('```js\n// header\nconst x = 1;\n```'), 1],
+  ['plain code unchanged', score('```js\nconst a = 1;\nconst b = 2;\n```'), 2],
+];
+for (const [name, got, want] of cases) {
+  assert.strictEqual(got, want, `FAILED: ${name} (got ${got}, want ${want})`);
+  console.log(`ok - ${name}`);
+  pass++;
+}
+console.log(`\n${pass}/${cases.length} passed`);