diff --git a/src/test/groovy/com/intershop/gradle/icm/docker/ICMDockerTaskIntegrationSpec.groovy b/src/test/groovy/com/intershop/gradle/icm/docker/ICMDockerTaskIntegrationSpec.groovy
index 6183f25..0169a4e 100644
--- a/src/test/groovy/com/intershop/gradle/icm/docker/ICMDockerTaskIntegrationSpec.groovy
+++ b/src/test/groovy/com/intershop/gradle/icm/docker/ICMDockerTaskIntegrationSpec.groovy
@@ -23,6 +23,8 @@ import static org.gradle.testkit.runner.TaskOutcome.SUCCESS
 
 class ICMDockerTaskIntegrationSpec extends AbstractIntegrationGroovySpec {
 
+    final ICMGRADLEVERSION = "5.6.0"
+
     def 'test create volumes task'() {
         settingsFile << """
         pluginManagement {
@@ -38,7 +40,7 @@ class ICMDockerTaskIntegrationSpec extends AbstractIntegrationGroovySpec {
         buildFile << """
             plugins {
                 id 'java'
-                id 'com.intershop.gradle.icm.project' version '5.6.0-SNAPSHOT'
+                id 'com.intershop.gradle.icm.project' version '$ICMGRADLEVERSION'
                 id 'com.intershop.gradle.icm.docker'
             }
             
@@ -113,7 +115,7 @@ class ICMDockerTaskIntegrationSpec extends AbstractIntegrationGroovySpec {
         buildFile << """
             plugins {
                 id 'java'
-                id 'com.intershop.gradle.icm.project' version '5.6.0-SNAPSHOT'
+                id 'com.intershop.gradle.icm.project' version '$ICMGRADLEVERSION'
                 id 'com.intershop.gradle.icm.docker'
             }
             
diff --git a/src/test/groovy/com/intershop/gradle/icm/docker/TaskICMGenSpec.groovy b/src/test/groovy/com/intershop/gradle/icm/docker/TaskICMGenSpec.groovy
index 6cfa8f5..d84657d 100644
--- a/src/test/groovy/com/intershop/gradle/icm/docker/TaskICMGenSpec.groovy
+++ b/src/test/groovy/com/intershop/gradle/icm/docker/TaskICMGenSpec.groovy
@@ -28,11 +28,13 @@ import static org.gradle.testkit.runner.TaskOutcome.SUCCESS
 
 class TaskICMGenSpec extends AbstractIntegrationGroovySpec {
 
+    final ICMGRADLEVERSION = "5.6.0"
+
     String buildfileContent =
             """
             plugins {
                 id 'java'
-                id 'com.intershop.gradle.icm.project' version '5.6.0-SNAPSHOT'
+                id 'com.intershop.gradle.icm.project' version '$ICMGRADLEVERSION'
                 id 'com.intershop.gradle.icm.docker'
             }
             """.stripIndent()