diff --git a/modules/videoio/test/test_ffmpeg.cpp b/modules/videoio/test/test_ffmpeg.cpp
index 87e25bbd3d..40ef586fd6 100644
--- a/modules/videoio/test/test_ffmpeg.cpp
+++ b/modules/videoio/test/test_ffmpeg.cpp
@@ -235,8 +235,8 @@ static void generateFrame(Mat &frame, unsigned int i, const Point &center, const
     frame = Scalar::all(i % 255);
     stringstream buf(ios::out);
     buf << "frame #" << i;
-    putText(frame, buf.str(), Point(50, center.y), FONT_HERSHEY_SIMPLEX, 5.0, color, 5, CV_AA);
-    circle(frame, center, i + 2, color, 2, CV_AA);
+    putText(frame, buf.str(), Point(50, center.y), FONT_HERSHEY_SIMPLEX, 5.0, color, 5, LINE_AA);
+    circle(frame, center, i + 2, color, 2, LINE_AA);
 }
 
 TEST(videoio_ffmpeg, parallel)
@@ -536,5 +536,17 @@ TEST(videoio_ffmpeg, create_with_property_badarg)
     EXPECT_FALSE(cap.isOpened());
 }
 
+// related issue: https://github.com/opencv/opencv/issues/16821
+TEST(videoio_ffmpeg, DISABLED_open_from_web)
+{
+    if (!videoio_registry::hasBackend(CAP_FFMPEG))
+        throw SkipTestException("FFmpeg backend was not found");
+
+    string video_file = "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4";
+    VideoCapture cap(video_file, CAP_FFMPEG);
+    int n_frames = -1;
+    EXPECT_NO_THROW(n_frames = (int)cap.get(CAP_PROP_FRAME_COUNT));
+    EXPECT_EQ((int)14315, n_frames);
+}
 
 }} // namespace
diff --git a/modules/videoio/test/test_precomp.hpp b/modules/videoio/test/test_precomp.hpp
index 5bc2ccdf95..cffdf2bef4 100644
--- a/modules/videoio/test/test_precomp.hpp
+++ b/modules/videoio/test/test_precomp.hpp
@@ -9,8 +9,6 @@
 #include "opencv2/ts.hpp"
 #include "opencv2/videoio.hpp"
 #include "opencv2/videoio/registry.hpp"
-#include "opencv2/imgproc/imgproc_c.h"
-
 #include "opencv2/core/private.hpp"
 
 namespace cv {
diff --git a/modules/videoio/test/test_video_io.cpp b/modules/videoio/test/test_video_io.cpp
index 8b6b16e16e..2ed1267433 100644
--- a/modules/videoio/test/test_video_io.cpp
+++ b/modules/videoio/test/test_video_io.cpp
@@ -1,47 +1,8 @@
-/*M///////////////////////////////////////////////////////////////////////////////////////
-//
-//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
-//
-//  By downloading, copying, installing or using the software you agree to this license.
-//  If you do not agree to this license, do not download, install,
-//  copy or use the software.
-//
-//
-//                           License Agreement
-//                For Open Source Computer Vision Library
-//
-// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
-// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
-// Third party copyrights are property of their respective owners.
-//
-// Redistribution and use in source and binary forms, with or without modification,
-// are permitted provided that the following conditions are met:
-//
-//   * Redistribution's of source code must retain the above copyright notice,
-//     this list of conditions and the following disclaimer.
-//
-//   * Redistribution's in binary form must reproduce the above copyright notice,
-//     this list of conditions and the following disclaimer in the documentation
-//     and/or other materials provided with the distribution.
-//
-//   * The name of the copyright holders may not be used to endorse or promote products
-//     derived from this software without specific prior written permission.
-//
-// This software is provided by the copyright holders and contributors "as is" and
-// any express or implied warranties, including, but not limited to, the implied
-// warranties of merchantability and fitness for a particular purpose are disclaimed.
-// In no event shall the Intel Corporation or contributors be liable for any direct,
-// indirect, incidental, special, exemplary, or consequential damages
-// (including, but not limited to, procurement of substitute goods or services;
-// loss of use, data, or profits; or business interruption) however caused
-// and on any theory of liability, whether in contract, strict liability,
-// or tort (including negligence or otherwise) arising in any way out of
-// the use of this software, even if advised of the possibility of such damage.
-//
-//M*/
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
 
 #include "test_precomp.hpp"
-#include "opencv2/videoio/videoio_c.h"
 
 namespace opencv_test
 {