diff --git a/clang/test/AST/Interp/intap.cpp b/clang/test/AST/Interp/intap.cpp
index 547e0a90d0da5d..ba9f28f2da4ab0 100644
--- a/clang/test/AST/Interp/intap.cpp
+++ b/clang/test/AST/Interp/intap.cpp
@@ -4,7 +4,7 @@
 // RUN: %clang_cc1 -std=c++20 -fms-extensions -verify=ref %s
 
 
-using MaxBitInt = _BitInt(8388608);
+using MaxBitInt = _BitInt(128);
 
 constexpr _BitInt(2) A = 0;
 constexpr _BitInt(2) B = A + 1;