diff --git a/Jenkinsfile b/Jenkinsfile
index 8ad049d76..c95dde4c8 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -1,7 +1,7 @@
 #!groovy
 node {
 
-    cesFqdn = "ecosystem.cloudogu.net"
+    cesFqdn = findHostName()
     cesUrl = "https://${cesFqdn}"
     credentials = usernamePassword(credentialsId: 'scmCredentials', passwordVariable: 'PASSWORD', usernameVariable: 'USERNAME')
 
@@ -21,7 +21,7 @@ node {
         parallel(
                 test: {
                     stage('Test') {
-                        String jacoco = "org.jacoco:jacoco-maven-plugin:0.7.7.201606060606";
+                        String jacoco = "org.jacoco:jacoco-maven-plugin:0.7.7.201606060606"
                         mvn "${jacoco}:prepare-agent test ${jacoco}:report"
                     }
                 },
@@ -72,6 +72,16 @@ void mvn(String args) {
     sh 'rm -f settings.xml'
 }
 
+String findHostName() {
+    String regexMatchesHostName = 'https?://([^:/]*)'
+
+    // Storing matcher in a variable might lead to java.io.NotSerializableException: java.util.regex.Matcher
+    if (!(env.JENKINS_URL =~ regexMatchesHostName)) {
+        script.error 'Unable to determine hostname from env.JENKINS_URL. Expecting http(s)://server:port/jenkins'
+    }
+    return (env.JENKINS_URL =~ regexMatchesHostName)[0][1]
+}
+
 void writeSettingsXml() {
     withCredentials([credentials]) {
         writeFile file: "settings.xml", text: """