diff --git a/lighthouse-cli/test/fixtures/dobetterweb/dbw_tester.html b/lighthouse-cli/test/fixtures/dobetterweb/dbw_tester.html
index a99969298073..1bdd9f121884 100644
--- a/lighthouse-cli/test/fixtures/dobetterweb/dbw_tester.html
+++ b/lighthouse-cli/test/fixtures/dobetterweb/dbw_tester.html
@@ -116,6 +116,12 @@ <h2>Do better web tester page</h2>
 
 </template>
 
+<!-- FAIL(image-aspect-ratio): image is naturally 480x318 -->
+<img src="lighthouse-480x318.jpg" width="480" height="57">
+<!-- PASS(image-aspect-ratio) -->
+<img src="lighthouse-480x318.jpg" width="480" height="318">
+
+
 <!-- Some websites overwrite the original Error object. The captureJSCallUsage function
   relies on the native Error object and prepareStackTrace from V8. When overwriting the stack
   property the e.stack inside the gatherer won't be in the correct format
diff --git a/lighthouse-cli/test/fixtures/dobetterweb/lighthouse-480x318.jpg b/lighthouse-cli/test/fixtures/dobetterweb/lighthouse-480x318.jpg
new file mode 100644
index 000000000000..ebf3ec496a24
Binary files /dev/null and b/lighthouse-cli/test/fixtures/dobetterweb/lighthouse-480x318.jpg differ
diff --git a/lighthouse-cli/test/smokehouse/dobetterweb/dbw-expectations.js b/lighthouse-cli/test/smokehouse/dobetterweb/dbw-expectations.js
index f027f8fc7bf6..e17b6a3f05b1 100644
--- a/lighthouse-cli/test/smokehouse/dobetterweb/dbw-expectations.js
+++ b/lighthouse-cli/test/smokehouse/dobetterweb/dbw-expectations.js
@@ -36,13 +36,13 @@ module.exports = [
         extendedInfo: {
           value: {
             results: {
-              length: 14,
+              length: 15,
             },
           },
         },
         details: {
           items: {
-            length: 14,
+            length: 15,
           },
         },
       },
@@ -185,6 +185,19 @@ module.exports = [
           },
         },
       },
+      'image-aspect-ratio': {
+        score: false,
+        details: {
+          items: {
+            0: {
+              2: {
+                text: /^480 x 57/,
+              },
+            },
+            length: 1,
+          },
+        },
+      },
     },
   }, {
     initialUrl: 'http://localhost:10200/dobetterweb/domtester.html?smallDOM',
diff --git a/lighthouse-core/audits/image-aspect-ratio.js b/lighthouse-core/audits/image-aspect-ratio.js
index 7529e86cb314..7273e65d63a1 100644
--- a/lighthouse-core/audits/image-aspect-ratio.js
+++ b/lighthouse-core/audits/image-aspect-ratio.js
@@ -95,7 +95,7 @@ class ImageAspectRatio extends Audit {
     ];
 
     return {
-      rawValue: results.length,
+      rawValue: results.length === 0,
       debugString,
       details: Audit.makeTableDetails(headings, results),
     };
diff --git a/lighthouse-core/test/audits/image-aspect-ratio-test.js b/lighthouse-core/test/audits/image-aspect-ratio-test.js
index c9c2f09c6f0f..7bec5c7d694d 100644
--- a/lighthouse-core/test/audits/image-aspect-ratio-test.js
+++ b/lighthouse-core/test/audits/image-aspect-ratio-test.js
@@ -5,7 +5,7 @@
  */
 'use strict';
 
-const Audit = require('../../audits/image-aspect-ratio.js');
+const ImageAspectRatioAudit = require('../../audits/image-aspect-ratio.js');
 const assert = require('assert');
 
 /* eslint-env mocha */
@@ -27,7 +27,7 @@ describe('Images: aspect-ratio audit', () => {
   function testImage(condition, data) {
     const description = `identifies when an image ${condition}`;
     it(description, () => {
-      const result = Audit.audit({
+      const result = ImageAspectRatioAudit.audit({
         ImageUsage: [
           generateImage(
             {width: data.clientSize[0], height: data.clientSize[1]},
@@ -38,12 +38,13 @@ describe('Images: aspect-ratio audit', () => {
         ],
       });
 
-      assert.equal(result.rawValue, data.listed ? 1 : 0);
+      assert.strictEqual(result.rawValue, data.rawValue, 'rawValue does not match');
+      assert.strictEqual(result.debugString, data.debugString, 'debugString does not match');
     });
   }
 
   testImage('is much larger than natural aspect ratio', {
-    listed: true,
+    rawValue: false,
     clientSize: [800, 500],
     naturalSize: [200, 200],
     props: {
@@ -53,7 +54,7 @@ describe('Images: aspect-ratio audit', () => {
   });
 
   testImage('is a css image and much larger than natural aspect ratio', {
-    listed: false,
+    rawValue: true,
     clientSize: [],
     naturalSize: [200, 200],
     props: {
@@ -63,7 +64,7 @@ describe('Images: aspect-ratio audit', () => {
   });
 
   testImage('is larger than natural aspect ratio', {
-    listed: true,
+    rawValue: false,
     clientSize: [400, 300],
     naturalSize: [200, 200],
     props: {
@@ -73,7 +74,7 @@ describe('Images: aspect-ratio audit', () => {
   });
 
   testImage('uses object-fit and is much smaller than natural aspect ratio', {
-    listed: false,
+    rawValue: true,
     clientSize: [200, 200],
     naturalSize: [800, 500],
     props: {
@@ -83,7 +84,7 @@ describe('Images: aspect-ratio audit', () => {
   });
 
   testImage('is much smaller than natural aspect ratio', {
-    listed: true,
+    rawValue: false,
     clientSize: [200, 200],
     naturalSize: [800, 500],
     props: {
@@ -93,7 +94,7 @@ describe('Images: aspect-ratio audit', () => {
   });
 
   testImage('is smaller than natural aspect ratio', {
-    listed: true,
+    rawValue: false,
     clientSize: [200, 200],
     naturalSize: [400, 300],
     props: {
@@ -103,7 +104,7 @@ describe('Images: aspect-ratio audit', () => {
   });
 
   testImage('aspect ratios match', {
-    listed: false,
+    rawValue: true,
     clientSize: [100, 100],
     naturalSize: [300, 300],
     props: {
@@ -112,8 +113,8 @@ describe('Images: aspect-ratio audit', () => {
     },
   });
 
-  testImage('has invalid sizing information', {
-    listed: false,
+  testImage('has no display sizing information', {
+    rawValue: true,
     clientSize: [0, 0],
     naturalSize: [100, 100],
     props: {
@@ -121,4 +122,15 @@ describe('Images: aspect-ratio audit', () => {
       usesObjectFit: false,
     },
   });
+
+  testImage('has invalid natural sizing information', {
+    rawValue: true,
+    debugString: 'Invalid image sizing information https://google.com/logo.png',
+    clientSize: [100, 100],
+    naturalSize: [0, 0],
+    props: {
+      isCss: false,
+      usesObjectFit: false,
+    },
+  });
 });