diff --git a/tests/test_http2_client_protocol.py b/tests/test_http2_client_protocol.py
index 075f1acb9..e96a5484e 100644
--- a/tests/test_http2_client_protocol.py
+++ b/tests/test_http2_client_protocol.py
@@ -76,7 +76,7 @@ class Data:
     STR_LARGE = generate_random_string(LARGE_SIZE)
 
     EXTRA_SMALL = generate_random_string(1024 * 15)
-    EXTRA_LARGE = generate_random_string((1024**2) * 15)
+    EXTRA_LARGE = generate_random_string(LARGE_SIZE)
 
     HTML_SMALL = make_html_body(STR_SMALL)
     HTML_LARGE = make_html_body(STR_LARGE)