diff --git a/bin/cas-curl b/bin/cas-curl
index 45fa22dd..0e4419c4 100755
--- a/bin/cas-curl
+++ b/bin/cas-curl
@@ -13,10 +13,16 @@ if [ "$1" == "--trace" ]; then
   }
   function doCurl() {
     set -x
-    curl --fail-with-body \
-        --header "Authorization: $HSADMINNG_CAS_TICKET" \
-        --header "assumed-roles: $HSADMINNG_CAS_ASSUME" \
-        "$@"
+    if [ -z "$HSADMINNG_CAS_ASSUME" ]; then
+      curl --fail-with-body \
+           --header "Authorization: $HSADMINNG_CAS_TICKET" \
+           "$@"
+    else
+      curl --fail-with-body \
+           --header "Authorization: $HSADMINNG_CAS_TICKET" \
+           --header "assumed-roles: $HSADMINNG_CAS_ASSUME" \
+           "$@"
+    fi
     set +x
   }
   shift
diff --git a/src/main/java/net/hostsharing/hsadminng/config/CasAuthenticator.java b/src/main/java/net/hostsharing/hsadminng/config/CasAuthenticator.java
index e0d8a9f1..5d6dd116 100644
--- a/src/main/java/net/hostsharing/hsadminng/config/CasAuthenticator.java
+++ b/src/main/java/net/hostsharing/hsadminng/config/CasAuthenticator.java
@@ -45,13 +45,13 @@ public class CasAuthenticator implements Authenticator {
     private String casValidation(final HttpServletRequest httpRequest)
             throws SAXException, IOException, ParserConfigurationException {
 
-        System.err.println("CasAuthenticator.casValidation using CAS-server: " + casServerUrl);
-
         final var ticket = httpRequest.getHeader("Authorization");
         final var url = casServerUrl + "/p3/serviceValidate" +
                 "?service=" + serviceUrl +
                 "&ticket=" + ticket;
 
+        System.err.println("CasAuthenticator.casValidation using URL: " + url);
+
         final var response = restTemplate.getForObject(url, String.class);
 
         final var doc = DocumentBuilderFactory.newInstance().newDocumentBuilder()