From b930c60fd94520cfd3e7d58f2f863cc718951bad Mon Sep 17 00:00:00 2001
From: Laura Hausmann <laura@hausmann.dev>
Date: Tue, 23 Jan 2024 04:18:11 +0100
Subject: [PATCH] Improve invalid signature test for http sigs

---
 Iceshrimp.Tests/Cryptography/HttpSignatureTests.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Iceshrimp.Tests/Cryptography/HttpSignatureTests.cs b/Iceshrimp.Tests/Cryptography/HttpSignatureTests.cs
index 0cdd0344..de776381 100644
--- a/Iceshrimp.Tests/Cryptography/HttpSignatureTests.cs
+++ b/Iceshrimp.Tests/Cryptography/HttpSignatureTests.cs
@@ -54,7 +54,7 @@ public class HttpSignatureTests {
 		                                   MockObjects.User, MockObjects.UserKeypair);
 
 		var sig = request.Headers.GetValues("Signature").First();
-		sig = new StringBuilder(sig) { [sig.Length - 10] = (char)(sig[10] + 1) }.ToString();
+		sig = new StringBuilder(sig) { [sig.Length - 10] = (char)(sig[10] + 1 % char.MaxValue) }.ToString();
 
 		request.Headers.Remove("Signature");
 		request.Headers.Add("Signature", sig);