diff --git a/tests/test_utils.py b/tests/test_utils.py
index 3d0227f..efda91a 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -38,6 +38,13 @@ def test_url_from_path():
     assert utils.url_from_path(os.sep.join(['foo', 'bar'])) == 'foo/bar'
 
 
+def test_url_from_windows_path(monkeypatch):
+    monkeypatch.setattr('os.sep', "\\")
+    path = os.sep.join(['foo', 'bar'])
+    assert path == r'foo\bar'
+    assert utils.url_from_path(path) == 'foo/bar'
+
+
 def test_read_markdown():
     src = os.path.join(SAMPLE_DIR, 'pictures', 'dir1', 'test1', '11.md')
     m = utils.read_markdown(src)
diff --git a/tests/test_video.py b/tests/test_video.py
index 4937cda..a53346e 100644
--- a/tests/test_video.py
+++ b/tests/test_video.py
@@ -11,6 +11,11 @@ TEST_VIDEO = 'stallman software-freedom-day-low.ogv'
 SRCFILE = os.path.join(CURRENT_DIR, 'sample', 'pictures', 'video', TEST_VIDEO)
 
 
+def test_video_size():
+    size_src = video_size(SRCFILE)
+    assert size_src == (480, 270)
+
+
 def test_generate_video_fit_height(tmpdir):
     """largest fitting dimension is height"""