diff --git a/package.json b/package.json
index b7baafa..7afc0d5 100644
--- a/package.json
+++ b/package.json
@@ -41,6 +41,7 @@
   },
   "devDependencies": {
     "chai": "^4.3.4",
+    "iconv-lite": "^0.6.3",
     "mocha": "^10.2.0",
     "prettier": "^3.3.2",
     "rimraf": "^3.0.2"
diff --git a/test/mbcs/chs_name.zip b/test/mbcs/chs_name.zip
new file mode 100644
index 0000000..6409adb
Binary files /dev/null and b/test/mbcs/chs_name.zip differ
diff --git a/test/mbcs/mbcs.test.js b/test/mbcs/mbcs.test.js
new file mode 100644
index 0000000..b94c6fa
--- /dev/null
+++ b/test/mbcs/mbcs.test.js
@@ -0,0 +1,322 @@
+const assert = require("assert");
+const pth = require("path");
+const Zip = require("../../adm-zip");
+const rimraf = require("rimraf");
+const iconv = require("iconv-lite");
+
+describe("Multibyte Character Sets in Filename", () => {
+    const destination = pth.resolve("./test/xxx");
+    const asset1 = pth.resolve("./test/mbcs/", "chs_name.zip");
+
+    // clean up folder content
+    afterEach((done) => rimraf(destination, done));
+
+    // chinese
+    it("ascii filename and chinese content", (done) => {
+        const encoding = "ascii";
+        const decoder = {
+            encode: (data) => iconv.encode(data, encoding),
+            decode: (data) => iconv.decode(data, encoding)
+        };
+
+        const content = "测试文本\ntest text";
+
+        const zip1 = new Zip({ decoder });
+        zip1.addFile("ascii.txt", content);
+        zip1.addFile("test/ascii.txt", content);
+        zip1.writeZip(pth.join(destination, "00-ascii.zip"));
+
+        const zip2 = new Zip(pth.join(destination, "00-ascii.zip"), { decoder });
+        const text = zip2.readAsText("ascii.txt");
+        assert(text === content, text);
+        done();
+    });
+
+    it("add files with chinese filename into new zip", (done) => {
+        const encoding = "gbk";
+        const decoder = {
+            encode: (data) => iconv.encode(data, encoding),
+            decode: (data) => iconv.decode(data, encoding)
+        };
+
+        const content = "文件内容";
+        const file = "中文路径.txt";
+
+        const zip1 = new Zip({ decoder });
+        zip1.addFile(file, content);
+        zip1.addFile("test/" + file, content);
+        zip1.writeZip(pth.join(destination, "01-chs_name.zip"));
+
+        const zip2 = new Zip(pth.join(destination, "01-chs_name.zip"), { decoder });
+        const text = zip2.readAsText(file);
+        assert(text === content, text);
+        done();
+    });
+
+    it("fetch file with chinese filename (gbk) in existing zip", (done) => {
+        const encoding = "gbk";
+        const decoder = {
+            encode: (data) => iconv.encode(data, encoding),
+            decode: (data) => iconv.decode(data, encoding)
+        };
+
+        let tZip = new Zip(asset1, { decoder });
+        for (let entry of tZip.getEntries()) {
+            if (entry.isDirectory) continue;
+            const CNpath = entry.entryName;
+            assert(CNpath === "中文路径.txt");
+        }
+        done();
+    });
+
+    it("add file with chinese filename into existing zip", (done) => {
+        const encoding = "gbk";
+        const decoder = {
+            encode: (data) => iconv.encode(data, encoding),
+            decode: (data) => iconv.decode(data, encoding)
+        };
+
+        const content = "文件内容";
+        const file1 = "test/中文测试.txt";
+        const file2 = "中文路径.txt";
+
+        let zip1 = new Zip(asset1, { decoder });
+        zip1.addFile(file1, content);
+        zip1.writeZip(pth.join(destination, "02-chs_name.zip"));
+
+        const zip2 = new Zip(pth.join(destination, "02-chs_name.zip"), { decoder });
+        const text1 = zip2.readAsText(file1);
+        assert(text1 === content, text1);
+
+        const text2 = zip2.readAsText(file2);
+        assert(text2 === content, text2);
+
+        done();
+    });
+
+    it("read and keep entry.extra while write zip", () => {
+        const encoding = "gbk";
+        const decoder = {
+            encode: (data) => iconv.encode(data, encoding),
+            decode: (data) => iconv.decode(data, encoding)
+        };
+
+        let zip1 = new Zip(asset1, { decoder });
+        let entry1 = zip1.getEntry("中文路径.txt", "gbk");
+        zip1.writeZip(pth.join(destination, "03-chs_name_clone.zip"));
+
+        let zip2 = new Zip(pth.join(destination, "03-chs_name_clone.zip"), { decoder });
+        let entry2 = zip2.getEntry("中文路径.txt");
+        assert(entry1.extra.equals(entry2.extra));
+
+        // "read EFSflag"
+        assert(entry1.header.flags_efs === false);
+        assert(entry2.header.flags_efs === false);
+    });
+
+    it("add files with chinese filename (UTF-8) into new zip", (done) => {
+        let zip1 = new Zip();
+        zip1.addFile("測試.txt", "測試");
+        zip1.addFile("test/測試.txt", "測試");
+        zip1.writeZip(pth.join(destination, "04-cht_name.zip"));
+
+        let zip2 = new Zip(pth.join(destination, "04-cht_name.zip"));
+        let entry = zip2.getEntry("測試.txt");
+        const text = zip2.readAsText(entry);
+        assert(text === "測試", text);
+
+        assert(entry.header.flags_efs);
+        done();
+    });
+
+    it("add files with chinese filename (Big5) into new zip", (done) => {
+        const encoding = "big5";
+        const decoder = {
+            encode: (data) => iconv.encode(data, encoding),
+            decode: (data) => iconv.decode(data, encoding)
+        };
+
+        const content = iconv.encode("測試", encoding); // buffer
+
+        let zip1 = new Zip({ decoder });
+        zip1.addFile("測試.txt", content);
+        zip1.addFile("test/測試.txt", content);
+        zip1.writeZip(pth.join(destination, "05-cht_name_big5.zip"));
+
+        const zip2 = new Zip(pth.join(destination, "05-cht_name_big5.zip"), { decoder });
+        const entry = zip2.getEntry("測試.txt");
+        const bufdata = zip2.readFile(entry);
+        //console.log(entry.toJSON())
+        assert(bufdata.equals(content));
+
+        assert(!entry.header.flags_efs);
+        done();
+    });
+
+    // japanese
+    it("add files with japanese filename (UTF-8) into new zip", (done) => {
+        const file = "にほんご.txt";
+        const content = "にほんご";
+
+        const zip1 = new Zip();
+        zip1.addFile(file, content);
+        zip1.addFile("test/" + file, content);
+        zip1.writeZip(pth.join(destination, "06-jp_name.zip"));
+
+        const zip2 = new Zip(pth.join(destination, "06-jp_name.zip"));
+        const text1 = zip2.readAsText(file);
+        assert(text1 === content, text1);
+        const entry2 = zip2.getEntry("test/" + file);
+        const text2 = zip2.readAsText(entry2);
+        assert(text2 === content, text2);
+        assert(entry2.header.flags_efs);
+        done();
+    });
+
+    it("add files with japanese filename (EUC-JP) into new zip", (done) => {
+        const encoding = "EUC-JP";
+        const decoder = {
+            encode: (data) => iconv.encode(data, encoding),
+            decode: (data) => iconv.decode(data, encoding)
+        };
+
+        const file = "にほんご.txt";
+        const content = iconv.encode("にほんご", encoding); // buffer
+
+        const zip1 = new Zip({ decoder });
+        zip1.addFile(file, content);
+        zip1.addFile("test/" + file, content);
+        zip1.writeZip(pth.join(destination, "07-jp_name.zip"));
+
+        const zip2 = new Zip(pth.join(destination, "07-jp_name.zip"), { decoder });
+        let entry1 = zip2.getEntry(file);
+        let bufdata1 = zip2.readFile(entry1);
+        assert(bufdata1.equals(content));
+        let entry2 = zip2.getEntry("test/" + file);
+        let bufdata2 = zip2.readFile(entry2);
+        assert(bufdata2.equals(content));
+        assert(entry1.header.flags_efs === false);
+        assert(entry2.header.flags_efs === false);
+        done();
+    });
+
+    it("add files with japanese filename (Shift_JIS) into new zip", (done) => {
+        const encoding = "Shift_JIS";
+        const decoder = {
+            encode: (data) => iconv.encode(data, encoding),
+            decode: (data) => iconv.decode(data, encoding)
+        };
+
+        const file = "にほんご.txt";
+        const content = "にほんご";
+        const bufdata = iconv.encode(content, "utf16le"); // buffer
+
+        const zip1 = new Zip({ decoder });
+        zip1.addFile(file, bufdata);
+        zip1.addFile("test/" + file, bufdata);
+        zip1.writeZip(pth.join(destination, "08-jp_name.zip"));
+
+        const zip2 = new Zip(pth.join(destination, "08-jp_name.zip"), { decoder });
+        let text1 = zip2.readAsText(file, "utf16le");
+        assert(text1 === content, text1);
+        let text2 = zip2.readAsText("test/" + file, "utf16le");
+        assert(text2 === content, text2);
+        done();
+    });
+
+    // hebrew (writing left to right)
+    it("add files with hebrew filename (UTF-8) into new zip", (done) => {
+        const file = "שפה עברית.txt";
+        const content = "יונה לבנה קטנה עפה מעל אנגליה";
+
+        const zip1 = new Zip();
+        zip1.addFile(file, content);
+        zip1.addFile("test/" + file, content);
+        zip1.writeZip(pth.join(destination, "09-heb_name.zip"));
+
+        const zip2 = new Zip(pth.join(destination, "09-heb_name.zip"));
+        const text1 = zip2.readAsText(file);
+        assert(text1 === content, text1);
+        const entry2 = zip2.getEntry("test/" + file);
+        const text2 = zip2.readAsText(entry2);
+        assert(text2 === content, text2);
+        assert(entry2.header.flags_efs);
+        done();
+    });
+
+    it("add files with hebrew filename (win1255) into new zip", (done) => {
+        const encoding = "win1255";
+        const decoder = {
+            encode: (data) => iconv.encode(data, encoding),
+            decode: (data) => iconv.decode(data, encoding)
+        };
+
+        const file = "שפה עברית.txt";
+        const content = "יונה לבנה קטנה עפה מעל אנגליה";
+        const bufdata = iconv.encode(content, "utf16le"); // buffer
+
+        const zip1 = new Zip({ decoder });
+        zip1.addFile(file, bufdata);
+        zip1.addFile("test/" + file, bufdata);
+        zip1.writeZip(pth.join(destination, "10-heb_name.zip"));
+
+        const zip2 = new Zip(pth.join(destination, "10-heb_name.zip"), { decoder });
+        let text1 = zip2.readAsText(file, "utf16le");
+        assert(text1 === content, text1);
+        let text2 = zip2.readAsText("test/" + file, "utf16le");
+        assert(text2 === content, text2);
+        done();
+    });
+
+    // Cyrillic
+    it("add files with bulgarian filename (win1251) into new zip", (done) => {
+        const encoding = "win1251";
+        const decoder = {
+            encode: (data) => iconv.encode(data, encoding),
+            decode: (data) => iconv.decode(data, encoding)
+        };
+
+        const file = "Български.txt";
+        const content = "Приключенията на таралежа";
+        const bufdata = iconv.encode(content, "utf16le"); // buffer
+
+        const zip1 = new Zip({ decoder });
+        zip1.addFile(file, bufdata);
+        zip1.addFile("test/" + file, bufdata);
+        zip1.writeZip(pth.join(destination, "11-bul_name.zip"));
+
+        const zip2 = new Zip(pth.join(destination, "11-bul_name.zip"), { decoder });
+        let entry1 = zip2.getEntry(file);
+        let text1 = zip2.readAsText(entry1, "utf16le");
+        assert(text1 === content, text1);
+        let entry2 = zip2.getEntry("test/" + file);
+        let text2 = zip2.readAsText(entry2, "utf16le");
+        assert(text2 === content, text2);
+        assert(entry1.header.flags_efs === false);
+        assert(entry2.header.flags_efs === false);
+        done();
+    });
+
+    // Unicode symbols
+    it("add files with Unicode symbols filename (utf8) into new zip", (done) => {
+        const file = "Symbols⌛🙈🙉.txt";
+        const content = "♜♞♝♛♚♝♞♜\n♟♟♟♟♟♟♟♟\n♙♙♙♙♙♙♙♙\n♖♘♗♕♔♗♘♖";
+        const bufdata = iconv.encode(content, "utf16le"); // buffer
+
+        const zip1 = new Zip();
+        zip1.addFile(file, bufdata);
+        zip1.addFile("test/" + file, bufdata);
+        zip1.writeZip(pth.join(destination, "12-sym_name.zip"));
+
+        const zip2 = new Zip(pth.join(destination, "12-sym_name.zip"));
+        let entry1 = zip2.getEntry(file);
+        let text1 = zip2.readAsText(entry1, "utf16le");
+        assert(text1 === content, text1);
+        let entry2 = zip2.getEntry("test/" + file);
+        let text2 = zip2.readAsText(entry2, "utf16le");
+        assert(text2 === content, text2);
+        assert(entry1.header.flags_efs);
+        assert(entry2.header.flags_efs);
+        done();
+    });
+});