diff --git a/libavutil/tests/pixfmt_best.c b/libavutil/tests/pixfmt_best.c
index a617633e9b..e98fcc19a5 100644
--- a/libavutil/tests/pixfmt_best.c
+++ b/libavutil/tests/pixfmt_best.c
@@ -117,6 +117,20 @@ int main(void)
     TEST(AV_PIX_FMT_GBRAP10,   AV_PIX_FMT_RGB48);
     TEST(AV_PIX_FMT_GBRAP12,   AV_PIX_FMT_RGB48);
 
+    // Formats containing the same data in different endianness.
+    TEST(AV_PIX_FMT_GRAY10BE,    AV_PIX_FMT_GRAY10);
+    TEST(AV_PIX_FMT_GRAY10LE,    AV_PIX_FMT_GRAY10);
+    TEST(AV_PIX_FMT_GRAY16BE,    AV_PIX_FMT_GRAY16);
+    TEST(AV_PIX_FMT_GRAY16LE,    AV_PIX_FMT_GRAY16);
+    TEST(AV_PIX_FMT_YUV422P10BE, AV_PIX_FMT_YUV422P10);
+    TEST(AV_PIX_FMT_YUV422P10LE, AV_PIX_FMT_YUV422P10);
+    TEST(AV_PIX_FMT_YUV444P16BE, AV_PIX_FMT_YUV444P16);
+    TEST(AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUV444P16);
+    TEST(AV_PIX_FMT_RGB565BE,    AV_PIX_FMT_RGB565);
+    TEST(AV_PIX_FMT_RGB565LE,    AV_PIX_FMT_RGB565);
+    TEST(AV_PIX_FMT_RGB48BE,     AV_PIX_FMT_RGB48);
+    TEST(AV_PIX_FMT_RGB48LE,     AV_PIX_FMT_RGB48);
+
     // Opaque formats are least unlike each other.
     TEST(AV_PIX_FMT_DXVA2_VLD, AV_PIX_FMT_VDPAU);
 
diff --git a/tests/ref/fate/pixfmt_best b/tests/ref/fate/pixfmt_best
index 1118198098..699e2e4213 100644
--- a/tests/ref/fate/pixfmt_best
+++ b/tests/ref/fate/pixfmt_best
@@ -1 +1 @@
-60 tests passed, 0 tests failed.
+72 tests passed, 0 tests failed.