diff --git a/lib/internal/modules/cjs/loader.js b/lib/internal/modules/cjs/loader.js
index 687d39563d184b..d5c6352c495636 100644
--- a/lib/internal/modules/cjs/loader.js
+++ b/lib/internal/modules/cjs/loader.js
@@ -1169,7 +1169,7 @@ Module.prototype._compile = function(content, filename) {
         } catch {
           // We only expect this codepath to be reached in the case of a
           // preloaded module (it will fail earlier with the main entry)
-          assert(Array.isArray(getOptionValue('--require')));
+          assert(ArrayIsArray(getOptionValue('--require')));
         }
       } else {
         resolvedArgv = 'repl';
diff --git a/test/es-module/test-cjs-esm-warn.js b/test/es-module/test-cjs-esm-warn.js
index b800a47d0515d5..ddeda72fc84b41 100644
--- a/test/es-module/test-cjs-esm-warn.js
+++ b/test/es-module/test-cjs-esm-warn.js
@@ -26,7 +26,7 @@ child.on('close', common.mustCall((code, signal) => {
   assert.strictEqual(code, 1);
   assert.strictEqual(signal, null);
 
-  assert.ok(stderr.indexOf(
+  assert.ok(stderr.replace(/\r/g, '').includes(
     `Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: ${required}` +
     '\nrequire() of ES modules is not supported.\nrequire() of ' +
     `${required} from ${requiring} ` +
@@ -35,10 +35,7 @@ child.on('close', common.mustCall((code, signal) => {
     'files in that package scope as ES modules.\nInstead rename ' +
     `${basename} to end in .cjs, change the requiring code to use ` +
     'import(), or remove "type": "module" from ' +
-    `${pjson}.\n`) !== -1);
-  assert.ok(stderr.indexOf(
-    'Error [ERR_REQUIRE_ESM]: Must use import to load ES Module') !== -1);
-
-  assert.strictEqual(
-    stderr.match(/Must use import to load ES Module/g).length, 1);
+    `${pjson}.\n`));
+  assert.ok(stderr.includes(
+    'Error [ERR_REQUIRE_ESM]: Must use import to load ES Module'));
 }));
diff --git a/test/es-module/test-esm-specifiers-both-flags.mjs b/test/es-module/test-esm-specifiers-both-flags.mjs
index fc5c7fcd0e98a9..a434684589dc07 100644
--- a/test/es-module/test-esm-specifiers-both-flags.mjs
+++ b/test/es-module/test-esm-specifiers-both-flags.mjs
@@ -9,8 +9,6 @@ const expectedError =
 const flags = '--es-module-specifier-resolution=node ' +
               '--experimental-specifier-resolution=node';
 
-exec(`${process.execPath} ${flags}`, {
-  timeout: 300
-}, mustCall((error) => {
+exec(`${process.execPath} ${flags}`, mustCall((error) => {
   assert(error.message.includes(expectedError));
 }));