diff --git a/Tests/helper.py b/Tests/helper.py
index a7691f64527..9849bf65565 100644
--- a/Tests/helper.py
+++ b/Tests/helper.py
@@ -261,11 +261,7 @@ def hopper(mode: str | None = None, cache: dict[str, Image.Image] = {}) -> Image
     # (for fast, isolated, repeatable tests).
     im = cache.get(mode)
     if im is None:
-        if mode == "RGBa":
-            im = hopper("RGBA").convert(mode)
-        elif mode == "La":
-            im = hopper("LA").convert(mode)
-        elif mode == "F":
+        if mode == "F":
             im = hopper("L").convert(mode)
         elif mode[:4] == "I;16":
             im = hopper("I").convert(mode)
diff --git a/src/libImaging/Convert.c b/src/libImaging/Convert.c
index 5cc39cd0019..de94ed159f0 100644
--- a/src/libImaging/Convert.c
+++ b/src/libImaging/Convert.c
@@ -941,12 +941,14 @@ static struct {
     {"RGB", "1", rgb2bit},
     {"RGB", "L", rgb2l},
     {"RGB", "LA", rgb2la},
+    {"RGB", "La", rgb2la},
     {"RGB", "I", rgb2i},
     {"RGB", "F", rgb2f},
     {"RGB", "BGR;15", rgb2bgr15},
     {"RGB", "BGR;16", rgb2bgr16},
     {"RGB", "BGR;24", rgb2bgr24},
     {"RGB", "RGBA", rgb2rgba},
+    {"RGB", "RGBa", rgb2rgba},
     {"RGB", "RGBX", rgb2rgba},
     {"RGB", "CMYK", rgb2cmyk},
     {"RGB", "YCbCr", ImagingConvertRGB2YCbCr},