diff --git a/test/invalid_file_test.cc b/test/invalid_file_test.cc
index 50e7c234afca151f01f3bfb74fe488b69801f51e..3cfb292d015862b14d063263489d463b0a2ce272 100644
--- a/test/invalid_file_test.cc
+++ b/test/invalid_file_test.cc
@@ -119,6 +119,7 @@ const DecodeParam kVP9InvalidFileTests[] = {
   {1, "invalid-vp90-2-12-droppable_1.ivf.s3676_r01-05_b6-.ivf"},
   {1, "invalid-vp90-2-05-resize.ivf.s59293_r01-05_b6-.ivf"},
   {1, "invalid-vp90-2-09-subpixel-00.ivf.s20492_r01-05_b6-.ivf"},
+  {1, "invalid-vp91-2-mixedrefcsp-444to420.ivf"},
 };
 
 VP9_INSTANTIATE_TEST_CASE(InvalidFileTest,
diff --git a/test/test-data.sha1 b/test/test-data.sha1
index 84b13f93432c004c2ee5ab47b8996c580d6ece09..ee1997f2815f80849288fa72fe347376737354b5 100644
--- a/test/test-data.sha1
+++ b/test/test-data.sha1
@@ -697,3 +697,5 @@ b03c408cf23158638da18dbc3323b99a1635c68a  invalid-vp90-2-12-droppable_1.ivf.s367
 741158f67c0d9d23726624d06bdc482ad368afc9  invalid-vp90-2-05-resize.ivf.s59293_r01-05_b6-.ivf.res
 8b1f7bf7e86c0976d277f60e8fcd9539e75a079a  invalid-vp90-2-09-subpixel-00.ivf.s20492_r01-05_b6-.ivf
 fb79dcbbbb8c82d5a750e339acce66e39a32f15f  invalid-vp90-2-09-subpixel-00.ivf.s20492_r01-05_b6-.ivf.res
+552e372e9b78127389fb06b34545df2cec15ba6d  invalid-vp91-2-mixedrefcsp-444to420.ivf
+a61774cf03fc584bd9f0904fc145253bb8ea6c4c  invalid-vp91-2-mixedrefcsp-444to420.ivf.res
diff --git a/test/test.mk b/test/test.mk
index c839c92f66f6b1567ada59abd6c388e065cee777..6d2dbd61a6a3f5d6aed25e32fe687ca0f2ca16c2 100644
--- a/test/test.mk
+++ b/test/test.mk
@@ -819,6 +819,8 @@ LIBVPX_TEST_DATA-$(CONFIG_VP9_DECODER) += invalid-vp90-2-09-subpixel-00.ivf.s204
 LIBVPX_TEST_DATA-$(CONFIG_VP9_DECODER) += invalid-vp90-2-09-subpixel-00.ivf.s20492_r01-05_b6-.ivf.res
 LIBVPX_TEST_DATA-$(CONFIG_VP9_DECODER) += invalid-vp90-2-12-droppable_1.ivf.s3676_r01-05_b6-.ivf
 LIBVPX_TEST_DATA-$(CONFIG_VP9_DECODER) += invalid-vp90-2-12-droppable_1.ivf.s3676_r01-05_b6-.ivf.res
+LIBVPX_TEST_DATA-$(CONFIG_VP9_DECODER) += invalid-vp91-2-mixedrefcsp-444to420.ivf
+LIBVPX_TEST_DATA-$(CONFIG_VP9_DECODER) += invalid-vp91-2-mixedrefcsp-444to420.ivf.res
 
 ifeq ($(CONFIG_DECODE_PERF_TESTS),yes)
 # BBB VP9 streams