diff --git a/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/LfsPrePushHook.java b/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/LfsPrePushHook.java
index a20c1d96f..4da3a74f2 100644
--- a/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/LfsPrePushHook.java
+++ b/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/LfsPrePushHook.java
@@ -221,7 +221,7 @@ private Map<String, LfsPointer> requestBatchUpload(HttpConnection api,
 	private void uploadContents(HttpConnection api,
 			Map<String, LfsPointer> oid2ptr) throws IOException {
 		try (JsonReader reader = new JsonReader(
-				new InputStreamReader(api.getInputStream()))) {
+				new InputStreamReader(api.getInputStream(), CHARSET))) {
 			for (Protocol.ObjectInfo o : parseObjects(reader)) {
 				if (o.actions == null) {
 					continue;
diff --git a/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/SmudgeFilter.java b/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/SmudgeFilter.java
index 6bff12f9c..6a758cfd4 100644
--- a/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/SmudgeFilter.java
+++ b/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/SmudgeFilter.java
@@ -179,7 +179,8 @@ public static Collection<Path> downloadLfsResource(Lfs lfs, Repository db,
 							Integer.valueOf(responseCode)));
 		}
 		try (JsonReader reader = new JsonReader(
-				new InputStreamReader(lfsServerConn.getInputStream()))) {
+				new InputStreamReader(lfsServerConn.getInputStream(),
+						CHARSET))) {
 			Protocol.Response resp = gson.fromJson(reader,
 					Protocol.Response.class);
 			for (Protocol.ObjectInfo o : resp.objects) {
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/indexdiff/IndexDiffWithSymlinkTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/indexdiff/IndexDiffWithSymlinkTest.java
index 26c11c7eb..2a99da0c1 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/indexdiff/IndexDiffWithSymlinkTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/indexdiff/IndexDiffWithSymlinkTest.java
@@ -170,7 +170,7 @@ private void copy(InputStream from, File to) throws IOException {
 
 	private String readStream(InputStream stream) throws IOException {
 		try (BufferedReader in = new BufferedReader(
-				new InputStreamReader(stream))) {
+				new InputStreamReader(stream, CHARSET))) {
 			StringBuilder out = new StringBuilder();
 			String line;
 			while ((line = in.readLine()) != null) {
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/CrissCrossMergeTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/CrissCrossMergeTest.java
index aaa08a9e3..974750df4 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/CrissCrossMergeTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/CrissCrossMergeTest.java
@@ -42,6 +42,8 @@
  */
 package org.eclipse.jgit.merge;
 
+import static org.eclipse.jgit.lib.Constants.CHARSET;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
@@ -881,7 +883,7 @@ private String contentAsString(Repository r, ObjectId treeId, String path)
 		StringBuilder result = new StringBuilder();
 		ObjectReader or = r.newObjectReader();
 		try (BufferedReader br = new BufferedReader(
-				new InputStreamReader(or.open(blobId).openStream()))) {
+				new InputStreamReader(or.open(blobId).openStream(), CHARSET))) {
 			String line;
 			boolean first = true;
 			while ((line = br.readLine()) != null) {
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/transport/WalkEncryptionTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/transport/WalkEncryptionTest.java
index 33e252973..97f392e63 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/transport/WalkEncryptionTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/transport/WalkEncryptionTest.java
@@ -420,7 +420,7 @@ static String publicAddress() throws Exception {
 				c.setConnectTimeout(500);
 				c.setReadTimeout(500);
 				try (BufferedReader reader = new BufferedReader(
-						new InputStreamReader(c.getInputStream()))) {
+						new InputStreamReader(c.getInputStream(), CHARSET))) {
 					return reader.readLine();
 				}
 			} catch (UnknownHostException | SocketTimeoutException e) {