diff --git a/testing/test_git.py b/testing/test_git.py
index <HASH>..<HASH> 100644
--- a/testing/test_git.py
+++ b/testing/test_git.py
@@ -414,7 +414,8 @@ def signed_commit_wd(tmp_path, monkeypatch, wd):
         """\
 %no-protection
 %transient-key
-Key-Type: default
+Key-Type: RSA
+Key-Length: 2048
 Name-Real: a test
 Name-Email: test@example.com
 Expire-Date: 0
Pick and configure an explicit `Key-Type`

If the default `Key-Type` happens to be an ECC, then `Key-Curve` would be a required parameter, so let's just pick RSA<I> and be done with it.