diff --git a/build/uk_master_test.xsl b/build/uk_master_test.xsl
index f96ce50e..77220704 100644
--- a/build/uk_master_test.xsl
+++ b/build/uk_master_test.xsl
@@ -14,7 +14,8 @@
 -->
 <xsl:stylesheet version="1.0"
 	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-	xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
+	xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
+	xmlns:elab="http://eduserv.org.uk/labels"
 	xmlns:idpdisc="urn:oasis:names:tc:SAML:profiles:SSO:idp-discovery-protocol"
 	xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata"
 	xmlns:shibmd="urn:mace:shibboleth:metadata:1.0"
@@ -162,6 +163,16 @@
 		</idpdisc:DiscoveryResponse>
 	</xsl:template>
 	
+	<!--
+		Normalise namespace on Athens PUID elements.
+	-->
+	
+	<xsl:template match="elab:AthensPUIDAuthority">
+		<elab:AthensPUIDAuthority>
+			<xsl:apply-templates select="node()|@*"/>
+		</elab:AthensPUIDAuthority>
+	</xsl:template>
+	
 	<!--
 		Normalise namespace on Shibboleth metadata elements.
 	-->