diff --git a/lighthouse-core/audits/seo/is-crawlable.js b/lighthouse-core/audits/seo/is-crawlable.js
index 343941326e27..788cfc130db5 100644
--- a/lighthouse-core/audits/seo/is-crawlable.js
+++ b/lighthouse-core/audits/seo/is-crawlable.js
@@ -31,7 +31,7 @@ function isUnavailable(directive) {
 }
 
 /**
- * Returns false if any of provided directives blocks page from being indexed
+ * Returns true if any of provided directives blocks page from being indexed
  * @param {string} directives
  * @returns {boolean}
  */
@@ -42,7 +42,7 @@ function hasBlockingDirective(directives) {
 }
 
 /**
- * Returns false if robots header specifies user agent (e.g. `googlebot: noindex`)
+ * Returns true if robots header specifies user agent (e.g. `googlebot: noindex`)
  * @param {string} directives
  * @returns {boolean}
  */
diff --git a/lighthouse-core/test/audits/seo/is-crawlable-test.js b/lighthouse-core/test/audits/seo/is-crawlable-test.js
index a14cfdd29240..2c669385658e 100644
--- a/lighthouse-core/test/audits/seo/is-crawlable-test.js
+++ b/lighthouse-core/test/audits/seo/is-crawlable-test.js
@@ -150,6 +150,7 @@ describe('SEO: Is page crawlable audit', () => {
     const mainResource = {
       responseHeaders: [
         {name: 'x-robots-tag', value: 'googlebot: unavailable_after: 25 Jun 2007 15:00:00 PST'},
+        {name: 'x-robots-tag', value: 'unavailable_after: 25 Jun 2045 15:00:00 PST'},
       ],
     };
     const artifacts = {