diff --git a/test/T350-crypto.sh b/test/T350-crypto.sh
index bd369f8f..f31cd3d7 100755
--- a/test/T350-crypto.sh
+++ b/test/T350-crypto.sh
@@ -158,7 +158,7 @@ expected='[[[{"id": "XXXXX",
  "sigstatus": [{"status": "good",
  "fingerprint": "'$FINGERPRINT'",
  "created": 946728000,
- "userid": "Notmuch Test Suite <test_suite@notmuchmail.org> (INSECURE!)"}],
+ "userid": "'"$SELF_USERID"'"}],
  "content-type": "multipart/signed",
  "content": [{"id": 2,
  "content-type": "text/plain",
@@ -366,7 +366,7 @@ expected='[[[{"id": "XXXXX",
  "sigstatus": [{"status": "good",
  "fingerprint": "'$FINGERPRINT'",
  "created": 946728000,
- "userid": "Notmuch Test Suite <test_suite@notmuchmail.org> (INSECURE!)"}],
+ "userid": "'"$SELF_USERID"'"}],
  "content-type": "multipart/encrypted",
  "content": [{"id": 2,
  "content-type": "application/pgp-encrypted",
diff --git a/test/test-lib.sh b/test/test-lib.sh
index 04d93f7d..b89da572 100644
--- a/test/test-lib.sh
+++ b/test/test-lib.sh
@@ -120,6 +120,7 @@ add_gnupg_home ()
 
     # Change this if we ship a new test key
     FINGERPRINT="5AEAB11F5E33DCE875DDB75B6D92612D94E46381"
+    SELF_USERID="Notmuch Test Suite <test_suite@notmuchmail.org> (INSECURE!)"
 }
 
 # Each test should start with something like this, after copyright notices: