diff --git a/src/PIL/BlpImagePlugin.py b/src/PIL/BlpImagePlugin.py
index f0fbc8cc2..95e807781 100644
--- a/src/PIL/BlpImagePlugin.py
+++ b/src/PIL/BlpImagePlugin.py
@@ -341,7 +341,7 @@ class BLP1Decoder(_BLPBaseDecoder):
             if self._blp_encoding in (4, 5):
                 palette = self._read_palette()
                 data = self._read_bgra(palette)
-                self.set_as_raw(bytes(data))
+                self.set_as_raw(data)
             else:
                 msg = f"Unsupported BLP encoding {repr(self._blp_encoding)}"
                 raise BLPFormatError(msg)
@@ -412,7 +412,7 @@ class BLP2Decoder(_BLPBaseDecoder):
             msg = f"Unknown BLP compression {repr(self._blp_compression)}"
             raise BLPFormatError(msg)
 
-        self.set_as_raw(bytes(data))
+        self.set_as_raw(data)
 
 
 class BLPEncoder(ImageFile.PyEncoder):
diff --git a/src/PIL/DdsImagePlugin.py b/src/PIL/DdsImagePlugin.py
index b89502d1f..93c8e341d 100644
--- a/src/PIL/DdsImagePlugin.py
+++ b/src/PIL/DdsImagePlugin.py
@@ -506,7 +506,7 @@ class DdsRgbDecoder(ImageFile.PyDecoder):
                 data += o8(
                     int(((masked_value >> mask_offsets[i]) / mask_totals[i]) * 255)
                 )
-        self.set_as_raw(bytes(data))
+        self.set_as_raw(data)
         return -1, 0
 
 
diff --git a/src/PIL/QoiImagePlugin.py b/src/PIL/QoiImagePlugin.py
index 1a2a4d388..e9fef37a9 100644
--- a/src/PIL/QoiImagePlugin.py
+++ b/src/PIL/QoiImagePlugin.py
@@ -98,7 +98,7 @@ class QoiDecoder(ImageFile.PyDecoder):
             if bands == 3:
                 value = value[:3]
             data += value
-        self.set_as_raw(bytes(data))
+        self.set_as_raw(data)
         return -1, 0