diff --git a/test/chromium-types.js b/test/chromium-types.js
index 899e790..780cc2c 100644
--- a/test/chromium-types.js
+++ b/test/chromium-types.js
@@ -5,7 +5,7 @@ module.exports = {
         { type: 'video/webm', extensions: 'webm' },
         { type: 'application/wasm', extensions: 'wasm' },
         { type: 'application/xhtml+xml', extensions: 'xhtml,xht,xhtm' },
-        { type: 'audio/x-flac', extensions: 'flac' }, // humphd: changed to x-flac
+        { type: 'audio/x-flac', extensions: 'flac' }, // humphd: changed to x-flac (per db.json)
         { type: 'audio/mp3', extensions: 'mp3' },
         { type: 'audio/ogg', extensions: 'ogg,oga' }, // humphd: removed opus extension
         { type: 'audio/wav', extensions: 'wav' },
@@ -26,7 +26,7 @@ module.exports = {
         { type: 'application/font-woff', extensions: 'woff' },
         { type: 'application/gzip', extensions: 'gz,tgz' },
         { type: 'application/javascript', extensions: 'js' },
-        { type: 'application/json', extensions: 'json' },  // Per http://www.ietf.org/rfc/rfc4627.txt.
+        { type: 'application/json', extensions: 'json' },
         { type: 'application/pdf', extensions: 'pdf' },
         { type: 'application/zip', extensions: 'zip' },
         { type: 'image/bmp', extensions: 'bmp' },
diff --git a/test/webkit-types.js b/test/webkit-types.js
index d2aed5f..137a583 100644
--- a/test/webkit-types.js
+++ b/test/webkit-types.js
@@ -2,7 +2,6 @@ module.exports = {
     browser: 'WebKit',
     mimeTypes: [
         // based on https://github.com/WebKit/webkit/blob/8e95493b2c7ce6ceb07b3d61f256741714482d07/Source/WebCore/platform/MIMETypeRegistry.cpp
-
         { type: 'image/gif', extensions: 'gif' },
         { type: 'image/jpeg', extensions: 'jpg' },
         { type: 'image/bmp', extensions: 'bmp' },
@@ -29,26 +28,12 @@ module.exports = {
         { type: 'font/otf', extensions: 'otf' },
         { type: 'font/ttf', extensions: 'ttf' },
         
-        // Ogg
         { type: 'application/ogg', extensions: 'ogx' },
         { type: 'audio/ogg', extensions: 'ogg,oga' },
         { type: 'video/ogg', extensions: 'ogv' },
 
-        // WebM
         { type: 'video/webm', extensions: 'webm' },
 
-        // MPEG
-//        { type: 'audio/mpeg', extensions: 'm1a,m2a,m1s,mpa' },
-//        { type: 'video/mpeg', extensions: 'mpg,m15,m1s,m1v,m75,mpa,mpeg,mpm,mpv' },
-
-        // MPEG-4
-//        { type: 'video/x-m4v', extensions: 'm4v' },
-//        { type: 'audio/x-m4a', extensions: 'm4a' },
-//        { type: 'audio/x-m4b', extensions: 'm4b' },
-//        { type: 'audio/x-m4p', extensions: 'm4p' },
-//        { type: 'audio/mp4', extensions: 'm4a' },
-
-        // MP3
         { type: 'audio/mp3', extensions: 'mp3' }
     ]
 };