diff --git a/jkube-kit/config/image/src/test/java/org/eclipse/jkube/kit/config/image/ImageNameTest.java b/jkube-kit/config/image/src/test/java/org/eclipse/jkube/kit/config/image/ImageNameTest.java
index bf8eec954e..332754c5c1 100644
--- a/jkube-kit/config/image/src/test/java/org/eclipse/jkube/kit/config/image/ImageNameTest.java
+++ b/jkube-kit/config/image/src/test/java/org/eclipse/jkube/kit/config/image/ImageNameTest.java
@@ -127,7 +127,7 @@ void testIllegalFormat() {
     @Test
     void shouldThrowExceptionOnTooLongImageName() {
         // New test for too long repository name
-        String tooLongName = generateTooLongImageName();
+        String tooLongName = StringUtils.repeat("a", 256);
         assertThatIllegalArgumentException()
             .as("Too long image name should fail")
             .isThrownBy(() -> new ImageName(tooLongName))