diff --git a/lang/python/tests/Makefile.am b/lang/python/tests/Makefile.am
index 2c2324e8..026df03e 100644
--- a/lang/python/tests/Makefile.am
+++ b/lang/python/tests/Makefile.am
@@ -113,8 +113,7 @@ pubring-stamp: $(test_srcdir)/pubdemo.asc gpg-sample.stamp
 gpg.conf:
 # This is required for t-sig-notations.
 	echo no-force-v3-sigs > ./gpg.conf
-	echo ignore-invalid-option agent-program >> ./gpg.conf
-	echo "agent-program `which $(GPG_AGENT)`|--debug-quick-random" >> ./gpg.conf
+	echo default-key A0FF4590BB6122EDEF6E3C542D727CC768697734 >> ./gpg.conf
 
 gpg-agent.conf:
 # This is required for gpg2, which does not support command fd.