diff --git a/debian/certs/benh@debian.org.cert.pem b/debian/certs/test-signing-certs.pem
similarity index 51%
rename from debian/certs/benh@debian.org.cert.pem
rename to debian/certs/test-signing-certs.pem
index 8d49875e5..fc07fa40e 100644
--- a/debian/certs/benh@debian.org.cert.pem
+++ b/debian/certs/test-signing-certs.pem
@@ -1,4 +1,23 @@
 -----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
 MIIDYDCCAkgCCQCKAY3KgJMmMDANBgkqhkiG9w0BAQsFADByMQswCQYDVQQGEwJH
 QjESMBAGA1UEBwwJQ2FtYnJpZGdlMRcwFQYDVQQKDA5EZWJpYW4gUHJvamVjdDEW
 MBQGA1UEAwwNQmVuIEh1dGNoaW5nczEeMBwGCSqGSIb3DQEJARYPYmVuaEBkZWJp
diff --git a/debian/changelog b/debian/changelog
index 6051892b1..d8092170c 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -57,6 +57,7 @@ linux (4.16-1~exp1) UNRELEASED; urgency=medium
   * debian/bin/gencontrol_signed.py: Copy maintainer and date into template's
     changelog
   * [x86,arm64] Enable code signing again
+  * certs: Add certificate for test key used in Debian signing service
 
  -- Roger Shimizu <rogershimizu@gmail.com>  Fri, 23 Mar 2018 21:10:34 +0900
 
diff --git a/debian/config/config b/debian/config/config
index 259ccb02d..cf44d1513 100644
--- a/debian/config/config
+++ b/debian/config/config
@@ -70,8 +70,8 @@ CONFIG_EFI_PARTITION=y
 ##
 #. Signatures are added in linux-signed
 CONFIG_MODULE_SIG_KEY=""
-#. Actually a list of X.509 certificates, not keys
-CONFIG_SYSTEM_TRUSTED_KEYS="debian/certs/benh@debian.org.cert.pem"
+#. Actually a file containing X.509 certificates, not keys
+CONFIG_SYSTEM_TRUSTED_KEYS="debian/certs/test-signing-certs.pem"
 
 ##
 ## file: crypto/Kconfig