diff --git a/tests/fate/filter.mak b/tests/fate/filter.mak
index 904b85cead..13053736f6 100644
--- a/tests/fate/filter.mak
+++ b/tests/fate/filter.mak
@@ -63,6 +63,9 @@ fate-filter-gradfun: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf gradfun
 FATE_FILTER_VSYNTH-$(CONFIG_HQDN3D_FILTER) += fate-filter-hqdn3d
 fate-filter-hqdn3d: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf hqdn3d
 
+FATE_FILTER_VSYNTH-$(CONFIG_INTERLACE_FILTER) += fate-filter-interlace
+fate-filter-interlace: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf interlace
+
 FATE_FILTER-$(call FILTERDEMDECENCMUX, JOIN, WAV, PCM_S16LE, PCM_S16LE, PCM_S16LE) += fate-filter-join
 fate-filter-join: SRC1 = $(TARGET_PATH)/tests/data/asynth-44100-2.wav
 fate-filter-join: SRC2 = $(TARGET_PATH)/tests/data/asynth-44100-3.wav
diff --git a/tests/ref/fate/filter-interlace b/tests/ref/fate/filter-interlace
new file mode 100644
index 0000000000..4659942590
--- /dev/null
+++ b/tests/ref/fate/filter-interlace
@@ -0,0 +1,26 @@
+#tb 0: 2/25
+0,          0,          0,        1,   152064, 0x6077db38
+0,          1,          1,        1,   152064, 0x3d4f1b15
+0,          2,          2,        1,   152064, 0x447594f6
+0,          3,          3,        1,   152064, 0xb6258a38
+0,          4,          4,        1,   152064, 0x296abb09
+0,          5,          5,        1,   152064, 0x0fad069d
+0,          6,          6,        1,   152064, 0x92c78c0d
+0,          7,          7,        1,   152064, 0x645531fd
+0,          8,          8,        1,   152064, 0xe7652880
+0,          9,          9,        1,   152064, 0x496e1151
+0,         10,         10,        1,   152064, 0x7f7cfb06
+0,         11,         11,        1,   152064, 0x45e9affe
+0,         12,         12,        1,   152064, 0xaedb2d3a
+0,         13,         13,        1,   152064, 0x03fd9ae6
+0,         14,         14,        1,   152064, 0x2084e84d
+0,         15,         15,        1,   152064, 0xcf05faf6
+0,         16,         16,        1,   152064, 0x84c746c2
+0,         17,         17,        1,   152064, 0x898a6321
+0,         18,         18,        1,   152064, 0xe12b7fe9
+0,         19,         19,        1,   152064, 0x12feb756
+0,         20,         20,        1,   152064, 0xd813601a
+0,         21,         21,        1,   152064, 0xc0f3d385
+0,         22,         22,        1,   152064, 0xfca3a63f
+0,         23,         23,        1,   152064, 0xa0796f44
+0,         24,         24,        1,   152064, 0x1d26af11