diff --git a/tests/data/test1800 b/tests/data/test1800
index 96a6c14612..0a2bb1f6df 100644
--- a/tests/data/test1800
+++ b/tests/data/test1800
@@ -48,7 +48,7 @@ Host: %HOSTIP:%HTTPPORT
 Accept: */*
 Connection: Upgrade, HTTP2-Settings
 Upgrade: %H2CVER
-HTTP2-Settings: AAMAAABkAAQAAP__
+HTTP2-Settings: AAMAAABkAARAAAAA
 
 </protocol>
 </verify>
diff --git a/tests/data/test1801 b/tests/data/test1801
index 16ee12d428..9e1900b9e7 100644
--- a/tests/data/test1801
+++ b/tests/data/test1801
@@ -58,7 +58,7 @@ Host: %HOSTIP:%HTTPPORT
 Accept: */*
 Connection: Upgrade, HTTP2-Settings
 Upgrade: %H2CVER
-HTTP2-Settings: AAMAAABkAAQAAP__
+HTTP2-Settings: AAMAAABkAARAAAAA
 
 </protocol>
 # CURLE_HTTP2: Send failure: Broken pipe