diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/patch/PatchApplierTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/patch/PatchApplierTest.java
index eeec14987..e2637257c 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/patch/PatchApplierTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/patch/PatchApplierTest.java
@@ -378,7 +378,7 @@ public void testShiftDown2() throws Exception {
 
 		@Test
 		public void testAddAlreadyExistingFile() throws Exception {
-			addFile("M1", "existing content".getBytes());
+			addFile("M1", "existing content".getBytes(StandardCharsets.UTF_8));
 			init("M1", false, false);
 
 			Result result = applyPatch();
@@ -429,7 +429,7 @@ public void testCopyNonexistentFile() throws Exception {
 
 		@Test
 		public void testCopyOnTopAlreadyExistingFile() throws Exception {
-			addFile("CopyResult", "existing content".getBytes());
+			addFile("CopyResult", "existing content".getBytes(StandardCharsets.UTF_8));
 			init("CopyWithHunks", true, false);
 
 			Result result = applyPatch();