diff --git a/codec/h264/h264dec/nalunit_test.go b/codec/h264/h264dec/nalunit_test.go
index 930fd2b3..b294760e 100644
--- a/codec/h264/h264dec/nalunit_test.go
+++ b/codec/h264/h264dec/nalunit_test.go
@@ -22,7 +22,7 @@ func TestNewMVCExtension(t *testing.T) {
 				"1" + // u(1) anchor_pic_flag = true
 				"0" + // u(1) inter_view_flag = false
 				"1" + // u(1) reserved_one_bit = 1
-				"0 00000000", // Some padding
+				"0", // Some padding
 			want: MVCExtension{
 				NonIdrFlag:     false,
 				PriorityID:     2,
@@ -93,3 +93,53 @@ func TestNewThreeDAVCExtension(t *testing.T) {
 		}
 	}
 }
+
+func TestSVCExtension(t *testing.T) {
+	tests := []struct {
+		in   string
+		want SVCExtension
+		err  error
+	}{
+		{
+			in: "0" + // u(1) idr_flag = false
+				"10 0000" + // u(6) priority_id = 32
+				"0" + // u(1) no_inter_layer_pred_flag = false
+				"001" + // u(3) dependency_id = 1
+				"1000" + // u(4) quality_id = 8
+				"010" + // u(3) temporal_id = 2
+				"1" + // u(1) use_ref_base_pic_flag = true
+				"0" + // u(1) discardable_flag = false
+				"0" + // u(1) output_flag = false
+				"11" + // ReservedThree2Bits
+				"0", // padding
+			want: SVCExtension{
+				IdrFlag:              false,
+				PriorityID:           32,
+				NoInterLayerPredFlag: false,
+				DependencyID:         1,
+				QualityID:            8,
+				TemporalID:           2,
+				UseRefBasePicFlag:    true,
+				DiscardableFlag:      false,
+				OutputFlag:           false,
+				ReservedThree2Bits:   3,
+			},
+		},
+	}
+
+	for i, test := range tests {
+		inBytes, err := binToSlice(test.in)
+		if err != nil {
+			t.Fatalf("did not expect error %v from binToSlice for test %d", err, i)
+		}
+
+		got, err := NewSVCExtension(bits.NewBitReader(bytes.NewReader(inBytes)))
+		if err != test.err {
+			t.Errorf("did not get expected error for test %d\nGot: %v\nWant: %v\n", i, err, test.err)
+		}
+
+		if !reflect.DeepEqual(*got, test.want) {
+			t.Errorf("did not get expected result for test %d\nGot: %v\nWant: %v\n", i, *got, test.want)
+		}
+	}
+}