diff --git a/jkube-kit/config/image/src/test/java/org/eclipse/jkube/kit/config/image/build/DockerFileBuilderTest.java b/jkube-kit/config/image/src/test/java/org/eclipse/jkube/kit/config/image/build/DockerFileBuilderTest.java
index 01eb7ecfac..6e74d0c43b 100644
--- a/jkube-kit/config/image/src/test/java/org/eclipse/jkube/kit/config/image/build/DockerFileBuilderTest.java
+++ b/jkube-kit/config/image/src/test/java/org/eclipse/jkube/kit/config/image/build/DockerFileBuilderTest.java
@@ -285,7 +285,7 @@ private static Map<String, String> dockerfileToMap(String dockerFile) {
         final Scanner scanner = new Scanner(dockerFile);
         while (scanner.hasNextLine()) {
             String line = scanner.nextLine();
-            if (line.trim().length() == 0) {
+            if (line.trim().isEmpty()) {
                 continue;
             }
             String[] commandAndArguments = line.trim().split("\\s+", 2);