diff --git a/test/fixtures/giant-image.jpg b/test/fixtures/giant-image.jpg
new file mode 100644
index 00000000..badb5918
Binary files /dev/null and b/test/fixtures/giant-image.jpg differ
diff --git a/test/fixtures/giant-image.png b/test/fixtures/giant-image.png
deleted file mode 100644
index 92c08a77..00000000
Binary files a/test/fixtures/giant-image.png and /dev/null differ
diff --git a/test/fixtures/index.js b/test/fixtures/index.js
index 04839b7a..73c0681e 100644
--- a/test/fixtures/index.js
+++ b/test/fixtures/index.js
@@ -66,6 +66,7 @@ module.exports = {
   inputJpgWithCmykNoProfile: getPath('Channel_digital_image_CMYK_color_no_profile.jpg'),
   inputJpgWithCorruptHeader: getPath('corrupt-header.jpg'),
   inputJpgWithLowContrast: getPath('low-contrast.jpg'), // http://www.flickr.com/photos/grizdave/2569067123/
+  inputJpgLarge: getPath('giant-image.jpg'),
 
   inputPng: getPath('50020484-00001.png'), // http://c.searspartsdirect.com/lis_png/PLDM/50020484-00001.png
   inputPngWithTransparency: getPath('blackbug.png'), // public domain
@@ -79,7 +80,6 @@ module.exports = {
   inputPngOverlayLayer2LowAlpha: getPath('alpha-layer-2-ink-low-alpha.png'),
   inputPngAlphaPremultiplicationSmall: getPath('alpha-premultiply-1024x768-paper.png'),
   inputPngAlphaPremultiplicationLarge: getPath('alpha-premultiply-2048x1536-paper.png'),
-  inputPngLarge: getPath('giant-image.png'),
 
   inputWebP: getPath('4.webp'), // http://www.gstatic.com/webp/gallery/4.webp
   inputWebPWithTransparency: getPath('5_webp_a.webp'), // http://www.gstatic.com/webp/gallery3/5_webp_a.webp
diff --git a/test/unit/io.js b/test/unit/io.js
index e94f98c8..c112971b 100644
--- a/test/unit/io.js
+++ b/test/unit/io.js
@@ -877,7 +877,7 @@ describe('Input/output', function() {
     });
 
     it('Disabling limit works', function(done) {
-      sharp(fixtures.inputPngLarge)
+      sharp(fixtures.inputJpgLarge)
         .limitInputPixels(false)
         .resize(2)
         .toBuffer(function(err) {
@@ -886,8 +886,8 @@ describe('Input/output', function() {
         });
     });
 
-    it('Enabling default limit fails works and fails with a large image', function(done) {
-      sharp(fixtures.inputPngLarge)
+    it('Enabling default limit works and fails with a large image', function(done) {
+      sharp(fixtures.inputJpgLarge)
         .limitInputPixels(true)
         .toBuffer(function(err) {
           assert.strictEqual(true, !!err);