diff --git a/ffmpeg/tests/test_ffmpeg.py b/ffmpeg/tests/test_ffmpeg.py
index 95e0042..e6d8186 100644
--- a/ffmpeg/tests/test_ffmpeg.py
+++ b/ffmpeg/tests/test_ffmpeg.py
@@ -146,6 +146,38 @@ def test_get_args_complex_filter():
         '-y'
     ]
 
+def _get_filter_with_select_example():
+    i = ffmpeg.input(TEST_INPUT_FILE1)
+    v1 = i[:"v"].hflip()
+    a1 = i[:"a"].filter_("aecho", 0.8, 0.9, 1000, 0.3)
+
+    return ffmpeg.output(a1, v1, TEST_OUTPUT_FILE1)
+
+def test_filter_with_select():
+    assert _get_filter_with_select_example().get_args() \
+           == ['-i', TEST_INPUT_FILE1,
+               '-filter_complex',
+               '[0:a]aecho=0.8:0.9:1000:0.3[s0];' \
+               '[0:v]hflip[s1]',
+               '-map', '[s0]', '-map', '[s1]',
+               TEST_OUTPUT_FILE1]
+
+def test_map_same_effect_as_output():
+    i1 = ffmpeg.input(TEST_INPUT_FILE1)
+    i2 = ffmpeg.input(TEST_OVERLAY_FILE)
+
+    o_map = i1.output(TEST_OUTPUT_FILE1)
+    o_map.map(i2)
+
+    o_nomap = ffmpeg.output(i1, i2, TEST_OUTPUT_FILE1)
+
+    assert o_map.node.incoming_edge_map == o_nomap.node.incoming_edge_map
+    assert o_map.get_args() == o_nomap.get_args() == ['-i', TEST_INPUT_FILE1,
+                                                      '-i', TEST_OVERLAY_FILE,
+                                                      '-map', '[0]',
+                                                      '-map', '[1]',
+                                                      TEST_OUTPUT_FILE1]
+
 
 def test_filter_normal_arg_escape():
     """Test string escaping of normal filter args (e.g. ``font`` param of ``drawtext`` filter)."""