Issue #19087: Improve bytearray allocation in order to allow cheap popping of data at the front (slice deletion).
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index 30eca4a..70b55b2 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -721,7 +721,7 @@
         samples = [b'', b'u'*100000]
         for sample in samples:
             x = bytearray(sample)
-            check(x, vsize('inP') + x.__alloc__())
+            check(x, vsize('n2Pi') + x.__alloc__())
         # bytearray_iterator
         check(iter(bytearray()), size('nP'))
         # cell