diff --git a/doc/usage.md b/doc/usage.md
index d6247b1..657846b 100644
--- a/doc/usage.md
+++ b/doc/usage.md
@@ -117,16 +117,16 @@ bot.sendPhoto(chatId, url);
 
 If you wish to explicitly specify the filename or
 [MIME type](http://en.wikipedia.org/wiki/Internet_media_type),
-you may pass the an additional argument as file options, like so:
+you may pass an additional argument as file options, like so:
 
 ```js
-const fileOpts = {
+const fileOptions = {
   // Explicitly specify the file name.
   filename: 'customfilename',
   // Explicitly specify the MIME type.
-  contentType: 'audio/mpeg'
+  contentType: 'audio/mpeg',
 };
-bot.sendAudio(chatId, data, {}, fileOpts);
+bot.sendAudio(chatId, data, {}, fileOptions);
 ```
 
 <a name="sending-files-options"></a>
@@ -140,6 +140,10 @@ variable `NTBA_FIX_350`.**
 In order of highest-to-lowest precedence in searching for
 a value, when resolving the `filename`:
 
+*(`fileOptions` is the Object argument passed to the method.
+The "file" argument passed to the method can be a `Stream`,
+`Buffer` or `filepath`.)*
+
 1. Is `fileOptions.filename` explictly defined?
 1. Does `Stream#path` exist?
 1. Is `filepath` provided?
@@ -152,7 +156,7 @@ And the `contentType`:
 1. Try detecting file-type from the `Buffer`
 1. Is `filepath` provided?
 1. Is `fileOptions.filename` explicitly defined?
-1. Default to `"application/octet-stream`
+1. Default to `"application/octet-stream"`
 
 <a name="sending-files-performance"></a>
 ### Performance Issue
diff --git a/test/telegram.js b/test/telegram.js
index c0501cf..b69727e 100644
--- a/test/telegram.js
+++ b/test/telegram.js
@@ -1332,33 +1332,7 @@ describe('TelegramBot', function telegramSuite() {
   });
 
   describe('#_formatSendData', function _formatSendDataSuite() {
-    it('should handle buffer path from fs.readStream', function test() {
-      let photo;
-      try {
-        photo = fs.createReadStream(Buffer.from(`${__dirname}/data/photo.gif`));
-      } catch (ex) {
-        // Older Node.js versions do not support passing a Buffer
-        // representation of the path to fs.createReadStream()
-        if (ex instanceof TypeError) return Promise.resolve();
-      }
-      return bot.sendPhoto(USERID, photo).then(resp => {
-        assert.ok(is.object(resp));
-        assert.ok(is.array(resp.photo));
-      });
-    });
-    it('should not accept file-paths if disallowed with constructor option', function test() {
-      const tgbot = new TelegramBot(TOKEN, { filepath: false });
-      const photo = `${__dirname}/data/photo.gif`;
-      return tgbot.sendPhoto(USERID, photo).catch(err => {
-        // TODO: check for error in a better way
-        assert.ok(err.response.body.description.indexOf('Bad Request') !== -1);
-      });
-    });
-    it('should allow stream.path that can not be parsed', function test() {
-      const stream = fs.createReadStream(`${__dirname}/data/photo.gif`);
-      stream.path = '/?id=123'; // for example, 'http://example.com/?id=666'
-      return bot.sendPhoto(USERID, stream);
-    });
+
   });
 
   describe('#sendInvoice', function sendInvoiceSuite() {
diff --git a/test/test.sendfile.js b/test/test.format-send-data.js
similarity index 74%
rename from test/test.sendfile.js
rename to test/test.format-send-data.js
index 7b69db7..9782842 100644
--- a/test/test.sendfile.js
+++ b/test/test.format-send-data.js
@@ -8,8 +8,9 @@ const paths = {
 };
 
 
-describe('sending files', function sendfileSuite() {
-  const bot = new TelegramBot('token ');
+describe('#_formatSendData', function sendfileSuite() {
+  const bot = new TelegramBot('token');
+  const type = 'file';
 
   before(function beforeSuite() {
     process.env.NTBA_FIX_350 = 1;
@@ -19,7 +20,6 @@ describe('sending files', function sendfileSuite() {
   });
 
   describe('using fileOptions', function sendfileOptionsSuite() {
-    const type = 'file';
     const stream = fs.createReadStream(paths.audio);
     const nonPathStream = fs.createReadStream(paths.audio);
     const buffer = fs.readFileSync(paths.audio);
@@ -105,4 +105,35 @@ describe('sending files', function sendfileSuite() {
       });
     });
   });
+
+  it('should handle buffer path from fs.readStream', function test() {
+    let file;
+    try {
+      file = fs.createReadStream(Buffer.from(paths.audio));
+    } catch (ex) {
+      // Older Node.js versions do not support passing a Buffer
+      // representation of the path to fs.createReadStream()
+      if (ex instanceof TypeError) {
+        Promise.resolve();
+        return;
+      }
+    }
+    const [{ [type]: data }] = bot._formatSendData('file', file);
+    assert.equal(data.options.filename, path.basename(paths.audio));
+  });
+
+  it('should not accept file-paths if disallowed with constructor option', function test() {
+    const tgbot = new TelegramBot('token', { filepath: false });
+    const [formData, fileId] = tgbot._formatSendData('file', paths.audio);
+    assert.ok(fileId);
+    assert.ok(!formData);
+  });
+
+  it('should allow stream.path that can not be parsed', function test() {
+    const stream = fs.createReadStream(paths.audio);
+    stream.path = '/?id=123'; // for example, 'http://example.com/?id=666'
+    assert.doesNotThrow(function assertDoesNotThrow() {
+      bot._formatSendData('file', stream);
+    });
+  });
 });