diff --git a/buildpack/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/ExportedImageTar.java b/buildpack/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/ExportedImageTar.java
index 3c9c7753903f..65384412e5fe 100644
--- a/buildpack/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/ExportedImageTar.java
+++ b/buildpack/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/ExportedImageTar.java
@@ -133,8 +133,7 @@ static LayerArchiveFactory create(ImageReference reference, Path tarFile) throws
 				if (index != null) {
 					return new IndexLayerArchiveFactory(tarFile, index);
 				}
-				Assert.state(manifest != null, "'manifest' must not be null");
-				return new ManifestLayerArchiveFactory(tarFile, manifest);
+				return new ManifestLayerArchiveFactory(manifest);
 			}
 		}
 
@@ -270,7 +269,7 @@ private static class ManifestLayerArchiveFactory extends LayerArchiveFactory {
 
 		private final Set<String> layers;
 
-		ManifestLayerArchiveFactory(Path tarFile, ImageArchiveManifest manifest) {
+		ManifestLayerArchiveFactory(ImageArchiveManifest manifest) {
 			this.layers = manifest.getEntries()
 				.stream()
 				.flatMap((entry) -> entry.getLayers().stream())