diff --git a/django/utils/text.py b/django/utils/text.py
index 8e0014fd0a..44007beb0f 100644
--- a/django/utils/text.py
+++ b/django/utils/text.py
@@ -280,26 +280,13 @@ def compress_string(s):
     return zbuf.getvalue()
 
 
-class StreamingBuffer:
-    def __init__(self):
-        self.vals = []
-
-    def write(self, val):
-        self.vals.append(val)
-
+class StreamingBuffer(BytesIO):
     def read(self):
-        if not self.vals:
-            return b''
-        ret = b''.join(self.vals)
-        self.vals = []
+        ret = self.getvalue()
+        self.seek(0)
+        self.truncate()
         return ret
 
-    def flush(self):
-        return
-
-    def close(self):
-        return
-
 
 # Like compress_string, but for iterators of strings.
 def compress_sequence(sequence):