diff --git a/tests/docker/dockerfiles/debian-bootstrap.pre b/tests/docker/dockerfiles/debian-bootstrap.pre
index c164778c30..35c85f7db8 100755
--- a/tests/docker/dockerfiles/debian-bootstrap.pre
+++ b/tests/docker/dockerfiles/debian-bootstrap.pre
@@ -79,6 +79,13 @@ else
     fi
 fi
 
+#
+# Add optional args
+#
+if [ -n "${DEB_KEYRING}" ]; then
+    DEBOOTSTRAP="${DEBOOTSTRAP} --keyring=${DEB_KEYRING}"
+fi
+
 #
 # Finally check to see if any qemu's are installed
 #