diff --git a/test/packaging.test.js b/test/packaging.test.js
index cf109e7..b463828 100644
--- a/test/packaging.test.js
+++ b/test/packaging.test.js
@@ -8,6 +8,7 @@ const os = require("node:os");
 const path = require("node:path");
 const { builtinModules } = require("node:module");
 const { spawnSync } = require("node:child_process");
+const ts = require("typescript");
 const pkg = require("alex2node/package.json");
 
 const ROOT = path.join(__dirname, "..");
@@ -53,14 +54,17 @@ test("each build has its own declarations, and \"exports\" names them before the
   }
 });
 
-test("the builds import Node built-ins and the declared dependencies, nothing else", () => {
+test("the builds and their declarations import Node built-ins and the declared dependencies, nothing else", () => {
   // "mqtt/lib/x" and "@scope/name/x" belong to the packages "mqtt" and "@scope/name"
   const packageOf = (specifier) => specifier.split("/").slice(0, specifier.startsWith("@") ? 2 : 1).join("/");
   const imported = new Set();
-  for (const file of files(DIST).filter((f) => f.endsWith(".js"))) {
-    const source = fs.readFileSync(path.join(DIST, file), "utf8");
-    for (const [, specifier] of source.matchAll(/(?:\brequire\(|\bfrom\s+|\bimport\s+)"([^".][^"]*)"/g)) {
-      if (!builtinModules.includes(specifier.replace(/^node:/, ""))) imported.add(packageOf(specifier));
+  for (const file of files(DIST).filter((f) => /\.(js|ts)$/.test(f))) {
+    // Read with the compiler's scanner: tsc keeps comments in its output, and an import in a usage example or in
+    // a string is not an import.
+    const { importedFiles } = ts.preProcessFile(fs.readFileSync(path.join(DIST, file), "utf8"), true, true);
+    for (const { fileName: specifier } of importedFiles) {
+      if (specifier.startsWith(".") || builtinModules.includes(specifier.replace(/^node:/, ""))) continue;
+      imported.add(packageOf(specifier));
     }
   }
   assert.deepEqual([...imported].sort(), Object.keys(pkg.dependencies).sort());