diff --git a/test/core/end2end/tests/invoke_large_request.c b/test/core/end2end/tests/invoke_large_request.c
index ae85af980ac..744a9ada57d 100644
--- a/test/core/end2end/tests/invoke_large_request.c
+++ b/test/core/end2end/tests/invoke_large_request.c
@@ -97,7 +97,7 @@ static void end_test(grpc_end2end_test_fixture *f) {
 
 static gpr_slice large_slice(void) {
   gpr_slice slice = gpr_slice_malloc(1000000);
-  memset(GPR_SLICE_START_PTR(slice), 0xab, GPR_SLICE_LENGTH(slice));
+  memset(GPR_SLICE_START_PTR(slice), 'x', GPR_SLICE_LENGTH(slice));
   return slice;
 }