diff --git a/test/ca.py b/test/ca.py
index 2ec24a31..ebd80599 100755
--- a/test/ca.py
+++ b/test/ca.py
@@ -114,7 +114,7 @@ def read_pubkey_file(fh):
                 comment = val.strip("\r\n")
             line = next(lines)
         # Now expect lines of base64 data.
-        while line != "---- BEGIN SSH2 PUBLIC KEY ----":
+        while line != "---- END SSH2 PUBLIC KEY ----":
             b64buf.write(line)
             line = next(lines)