diff --git a/Lib/test/test_binascii.py b/Lib/test/test_binascii.py
index 3d3e0746e9bfdf..ef744f6b97259c 100644
--- a/Lib/test/test_binascii.py
+++ b/Lib/test/test_binascii.py
@@ -230,7 +230,7 @@ def test_uu(self):
             binascii.b2a_uu(b"", True)
 
     @hypothesis.given(
-        binary=hypothesis.strategies.binary(),
+        binary=hypothesis.strategies.binary(max_size=45),
         backtick=hypothesis.strategies.booleans(),
     )
     def test_b2a_roundtrip(self, binary, backtick):