diff --git a/tests/expected/auto/catalog_auto.json b/tests/expected/auto/catalog_auto.json
index aee15fa89..2b977e8bc 100644
--- a/tests/expected/auto/catalog_auto.json
+++ b/tests/expected/auto/catalog_auto.json
@@ -146,6 +146,9 @@
     "rgb_u8": {
       "content_type": "image/png"
     },
+    "rgba_u8": {
+      "content_type": "image/png"
+    },
     "stamen_toner__raster_CC-BY-ODbL_z3": {
       "content_type": "image/png"
     },
diff --git a/tests/expected/auto/rgba_u8_0_0_0.png b/tests/expected/auto/rgba_u8_0_0_0.png
new file mode 100644
index 000000000..5955c79d7
Binary files /dev/null and b/tests/expected/auto/rgba_u8_0_0_0.png differ
diff --git a/tests/expected/auto/rgba_u8_0_0_0.png.txt b/tests/expected/auto/rgba_u8_0_0_0.png.txt
new file mode 100644
index 000000000..4e6e2586e
--- /dev/null
+++ b/tests/expected/auto/rgba_u8_0_0_0.png.txt
@@ -0,0 +1 @@
+tests/output/auto/rgba_u8_0_0_0.png: PNG image data, 256 x 256, 8-bit/color RGBA, non-interlaced
diff --git a/tests/expected/auto/rgba_u8_3_1_1.png b/tests/expected/auto/rgba_u8_3_1_1.png
new file mode 100644
index 000000000..d423a6695
Binary files /dev/null and b/tests/expected/auto/rgba_u8_3_1_1.png differ
diff --git a/tests/expected/auto/rgba_u8_3_1_1.png.txt b/tests/expected/auto/rgba_u8_3_1_1.png.txt
new file mode 100644
index 000000000..46ea068fe
--- /dev/null
+++ b/tests/expected/auto/rgba_u8_3_1_1.png.txt
@@ -0,0 +1 @@
+tests/output/auto/rgba_u8_3_1_1.png: PNG image data, 256 x 256, 8-bit/color RGBA, non-interlaced
diff --git a/tests/expected/auto/save_config.yaml b/tests/expected/auto/save_config.yaml
index 9438dfa63..f701f5620 100644
--- a/tests/expected/auto/save_config.yaml
+++ b/tests/expected/auto/save_config.yaml
@@ -252,6 +252,7 @@ cog:
     gray_u8: tests/fixtures/cog/gray_u8.tif
     rgb_u16: tests/fixtures/cog/rgb_u16.tif
     rgb_u8: tests/fixtures/cog/rgb_u8.tif
+    rgba_u8: tests/fixtures/cog/rgba_u8.tif
 sprites: tests/fixtures/sprites/src1
 fonts:
 - tests/fixtures/fonts/overpass-mono-regular.ttf