diff --git a/tests/fate/image.mak b/tests/fate/image.mak
index 1d3dbc10e91fa28a4a513695dc1362546b6bf210..dc78302e63b041979192aa841ed2d70fbdb9e85b 100644
--- a/tests/fate/image.mak
+++ b/tests/fate/image.mak
@@ -16,6 +16,9 @@ fate-sunraster-1bit-rle: CMD = framecrc -i $(SAMPLES)/sunraster/lena-1bit-rle.su
 FATE_SUNRASTER += fate-sunraster-8bit-raw
 fate-sunraster-8bit-raw: CMD = framecrc -i $(SAMPLES)/sunraster/lena-8bit-raw.sun -pix_fmt rgb24
 
+FATE_SUNRASTER += fate-sunraster-8bit_gray-raw
+fate-sunraster-8bit_gray-raw: CMD = framecrc -i $(SAMPLES)/sunraster/gray.ras
+
 FATE_SUNRASTER += fate-sunraster-8bit-rle
 fate-sunraster-8bit-rle: CMD = framecrc -i $(SAMPLES)/sunraster/lena-8bit-rle.sun -pix_fmt rgb24
 
diff --git a/tests/ref/fate/sunraster-8bit_gray-raw b/tests/ref/fate/sunraster-8bit_gray-raw
new file mode 100644
index 0000000000000000000000000000000000000000..455af5f612a94a988a66a0005b32a5d8594c541d
--- /dev/null
+++ b/tests/ref/fate/sunraster-8bit_gray-raw
@@ -0,0 +1,2 @@
+#tb 0: 1/25
+0,          0,          0,        1,   786432, 0x5859b48e