diff --git a/lighthouse-core/test/audits/seo/canonical.js b/lighthouse-core/test/audits/seo/canonical-test.js
similarity index 91%
rename from lighthouse-core/test/audits/seo/canonical.js
rename to lighthouse-core/test/audits/seo/canonical-test.js
index 0002fc0814b9..c95afde3d6c8 100644
--- a/lighthouse-core/test/audits/seo/canonical.js
+++ b/lighthouse-core/test/audits/seo/canonical-test.js
@@ -45,7 +45,7 @@ describe('SEO: Document has valid canonical link', () => {
 
     return CanonicalAudit.audit(artifacts).then(auditResult => {
       assert.equal(auditResult.rawValue, false);
-      assert.ok(auditResult.debugString.includes('multiple'));
+      assert.ok(auditResult.debugString.includes('Multiple'), auditResult.debugString);
     });
   });
 
@@ -63,7 +63,7 @@ describe('SEO: Document has valid canonical link', () => {
 
     return CanonicalAudit.audit(artifacts).then(auditResult => {
       assert.equal(auditResult.rawValue, false);
-      assert.ok(auditResult.debugString.includes('invalid'));
+      assert.ok(auditResult.debugString.includes('Invalid'), auditResult.debugString);
     });
   });
 
@@ -81,7 +81,7 @@ describe('SEO: Document has valid canonical link', () => {
 
     return CanonicalAudit.audit(artifacts).then(auditResult => {
       assert.equal(auditResult.rawValue, false);
-      assert.ok(auditResult.debugString.includes('relative'));
+      assert.ok(auditResult.debugString.includes('Relative'), auditResult.debugString);
     });
   });
 
@@ -102,7 +102,7 @@ describe('SEO: Document has valid canonical link', () => {
 
     return CanonicalAudit.audit(artifacts).then(auditResult => {
       assert.equal(auditResult.rawValue, false);
-      assert.ok(auditResult.debugString.includes('hreflang'));
+      assert.ok(auditResult.debugString.includes('hreflang'), auditResult.debugString);
     });
   });
 
@@ -120,7 +120,7 @@ describe('SEO: Document has valid canonical link', () => {
 
     return CanonicalAudit.audit(artifacts).then(auditResult => {
       assert.equal(auditResult.rawValue, false);
-      assert.ok(auditResult.debugString.includes('domain'));
+      assert.ok(auditResult.debugString.includes('domain'), auditResult.debugString);
     });
   });
 
@@ -138,7 +138,7 @@ describe('SEO: Document has valid canonical link', () => {
 
     return CanonicalAudit.audit(artifacts).then(auditResult => {
       assert.equal(auditResult.rawValue, false);
-      assert.ok(auditResult.debugString.includes('root'));
+      assert.ok(auditResult.debugString.includes('root'), auditResult.debugString);
     });
   });
 
diff --git a/lighthouse-core/test/audits/seo/hreflang.js b/lighthouse-core/test/audits/seo/hreflang-test.js
similarity index 100%
rename from lighthouse-core/test/audits/seo/hreflang.js
rename to lighthouse-core/test/audits/seo/hreflang-test.js
diff --git a/lighthouse-core/test/audits/seo/plugins.js b/lighthouse-core/test/audits/seo/plugins-test.js
similarity index 100%
rename from lighthouse-core/test/audits/seo/plugins.js
rename to lighthouse-core/test/audits/seo/plugins-test.js