diff --git a/lib/document-downloader.js b/lib/document-downloader.js
index 6d692640..5f121919 100644
--- a/lib/document-downloader.js
+++ b/lib/document-downloader.js
@@ -27,6 +27,7 @@ DocumentDownloader.fetch = url =>
     sua
       .get(url)
       .set('User-Agent', 'W3C/Echidna')
+      .responseType('blob')
       .end((err, res) => {
         if (err) {
           reject(
diff --git a/test/test.js b/test/test.js
index 82fe3599..7e9817b0 100644
--- a/test/test.js
+++ b/test/test.js
@@ -79,8 +79,7 @@ describe('DocumentDownloader', () => {
       const notFound = DocumentDownloader.fetch(
         `${server.location()}/et/si/tu/n/existais/pas`,
       );
-
-      return expect(notFound).to.eventually.be.rejectedWith(/code 404/);
+      return expect(notFound).to.eventually.be.rejectedWith(/Not Found/);
     });
 
     it('should reject if the server is not reachable', () => {
@@ -241,7 +240,7 @@ describe('DocumentDownloader', () => {
         '/tmp/whatever',
       );
 
-      return expect(notFound).to.eventually.be.rejectedWith(/code 404/);
+      return expect(notFound).to.eventually.be.rejectedWith(/Not Found/);
     });
 
     it('should reject if the server is not reachable', () => {