diff --git a/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/TestJarFile.java b/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/TestJarFile.java
index 0b4acbe9ab..cca814dedb 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/TestJarFile.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/TestJarFile.java
@@ -22,10 +22,14 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.jar.JarFile;
 import java.util.jar.Manifest;
 
 import org.junit.rules.TemporaryFolder;
+import org.zeroturnaround.zip.FileSource;
+import org.zeroturnaround.zip.ZipEntrySource;
 import org.zeroturnaround.zip.ZipUtil;
 
 /**
@@ -40,6 +44,8 @@ public class TestJarFile {
 
 	private final File jarSource;
 
+	private final List<ZipEntrySource> entries = new ArrayList<>();
+
 	public TestJarFile(TemporaryFolder temporaryFolder) throws IOException {
 		this.temporaryFolder = temporaryFolder;
 		this.jarSource = temporaryFolder.newFolder();
@@ -59,6 +65,7 @@ public class TestJarFile {
 		if (time != null) {
 			file.setLastModified(time);
 		}
+		this.entries.add(new FileSource(filename, file));
 	}
 
 	public void addFile(String filename, File fileToCopy) throws IOException {
@@ -67,6 +74,7 @@ public class TestJarFile {
 		try (InputStream inputStream = new FileInputStream(fileToCopy)) {
 			copyToFile(inputStream, file);
 		}
+		this.entries.add(new FileSource(filename, file));
 	}
 
 	public void addManifest(Manifest manifest) throws IOException {
@@ -75,6 +83,7 @@ public class TestJarFile {
 		try (OutputStream outputStream = new FileOutputStream(manifestFile)) {
 			manifest.write(outputStream);
 		}
+		this.entries.add(new FileSource("META-INF/MANIFEST.MF", manifestFile));
 	}
 
 	private File getFilePath(String filename) {
@@ -114,7 +123,7 @@ public class TestJarFile {
 	public File getFile(String extension) throws IOException {
 		File file = this.temporaryFolder.newFile();
 		file = new File(file.getParent(), file.getName() + "." + extension);
-		ZipUtil.pack(this.jarSource, file);
+		ZipUtil.pack(this.entries.toArray(new ZipEntrySource[this.entries.size()]), file);
 		return file;
 	}