diff --git a/lib/fsInterface.js b/lib/fsInterface.js
index adb0c0a6..45bef767 100644
--- a/lib/fsInterface.js
+++ b/lib/fsInterface.js
@@ -12,8 +12,9 @@
  * [<code>mkdir</code>]{@link https://nodejs.org/api/fs.html#fs_fs_mkdir_path_options_callback}
  */
 module.exports = (reader) => {
+	const slash = require("slash");
 	return {
-		readFile(path, options, callback) {
+		readFile(fsPath, options, callback) {
 			if (typeof options === "function") {
 				callback = options;
 				options = undefined;
@@ -21,7 +22,8 @@ module.exports = (reader) => {
 			if (typeof options === "string") {
 				options = {encoding: options};
 			}
-			reader.byPath(path, {
+			const posixPath = slash(fsPath);
+			reader.byPath(posixPath, {
 				nodir: false
 			}).then(function(resource) {
 				if (!resource) {
@@ -44,8 +46,9 @@ module.exports = (reader) => {
 				});
 			}).catch(callback);
 		},
-		stat(path, callback) {
-			reader.byPath(path, {
+		stat(fsPath, callback) {
+			const posixPath = slash(fsPath);
+			reader.byPath(posixPath, {
 				nodir: false
 			}).then(function(resource) {
 				if (!resource) {
@@ -57,12 +60,13 @@ module.exports = (reader) => {
 				}
 			}).catch(callback);
 		},
-		readdir(path, callback) {
-			if (!path.match(/\/$/)) {
+		readdir(fsPath, callback) {
+			let posixPath = slash(fsPath);
+			if (!posixPath.match(/\/$/)) {
 				// Add trailing slash if not present
-				path += "/";
+				posixPath += "/";
 			}
-			reader.byGlob(path + "*", {
+			reader.byGlob(posixPath + "*", {
 				nodir: false
 			}).then((resources) => {
 				const files = resources.map((resource) => {
@@ -71,7 +75,7 @@ module.exports = (reader) => {
 				callback(null, files);
 			}).catch(callback);
 		},
-		mkdir(path, callback) {
+		mkdir(fsPath, callback) {
 			setTimeout(callback, 0);
 		}
 	};
diff --git a/package-lock.json b/package-lock.json
index a591e058..78c67d97 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3021,6 +3021,13 @@
 				"ignore": "^4.0.3",
 				"pify": "^4.0.1",
 				"slash": "^2.0.0"
+			},
+			"dependencies": {
+				"slash": {
+					"version": "2.0.0",
+					"resolved": "https://registry.npmjs.org/slash/-/slash-2.0.0.tgz",
+					"integrity": "sha512-ZYKh3Wh2z1PpEXWr0MpSBZ0V6mZHAQfYevttO11c51CaWjGTaadiKZ+wVt1PbMlDV5qhMFslpZCemhwOK7C89A=="
+				}
 			}
 		},
 		"got": {
@@ -5857,9 +5864,9 @@
 			}
 		},
 		"slash": {
-			"version": "2.0.0",
-			"resolved": "https://registry.npmjs.org/slash/-/slash-2.0.0.tgz",
-			"integrity": "sha512-ZYKh3Wh2z1PpEXWr0MpSBZ0V6mZHAQfYevttO11c51CaWjGTaadiKZ+wVt1PbMlDV5qhMFslpZCemhwOK7C89A=="
+			"version": "3.0.0",
+			"resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+			"integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q=="
 		},
 		"slice-ansi": {
 			"version": "1.0.0",
diff --git a/package.json b/package.json
index 59955a29..a8dbce42 100644
--- a/package.json
+++ b/package.json
@@ -105,7 +105,8 @@
 		"minimatch": "^3.0.3",
 		"mock-require": "^3.0.3",
 		"pretty-hrtime": "^1.0.3",
-		"random-int": "^2.0.0"
+		"random-int": "^2.0.0",
+		"slash": "^3.0.0"
 	},
 	"devDependencies": {
 		"ava": "^2.1.0",
diff --git a/test/fixtures/fsInterface/foo.txt b/test/fixtures/fsInterface/foo.txt
index 538451fc..6b584e8e 100644
--- a/test/fixtures/fsInterface/foo.txt
+++ b/test/fixtures/fsInterface/foo.txt
@@ -1 +1 @@
-content of /foo.txt
\ No newline at end of file
+content
\ No newline at end of file
diff --git a/test/lib/fsInterface.js b/test/lib/fsInterface.js
index d0d7f163..adf4ff1f 100644
--- a/test/lib/fsInterface.js
+++ b/test/lib/fsInterface.js
@@ -9,23 +9,24 @@ const MemAdapter = ui5Fs.adapters.Memory;
 const FsAdapter = ui5Fs.adapters.FileSystem;
 const Resource = ui5Fs.Resource;
 
-const assertReadFile = (t, readFile, basepath, filepath) => {
-	const fullpath = basepath + filepath;
+const assertReadFile = (t, readFile, basepath, filepath, content) => {
+	content = content || "content of " + filepath;
+	const fullpath = path.join(basepath, filepath);
 	return readFile(fullpath).then((buffer) => {
 		t.true(Buffer.isBuffer(buffer));
-		t.deepEqual(buffer.toString(), "content of " + filepath);
+		t.deepEqual(buffer.toString(), content);
 	}).then(() => readFile(fullpath, {})).then((buffer) => {
 		t.true(Buffer.isBuffer(buffer));
-		t.deepEqual(buffer.toString(), "content of " + filepath);
+		t.deepEqual(buffer.toString(), content);
 	}).then(() => readFile(fullpath, {encoding: null})).then((buffer) => {
 		t.true(Buffer.isBuffer(buffer));
-		t.deepEqual(buffer.toString(), "content of " + filepath);
+		t.deepEqual(buffer.toString(), content);
 	}).then(() => readFile(fullpath, "utf8").then((content) => {
 		t.is(typeof content, "string");
-		t.deepEqual(content, "content of " + filepath);
+		t.deepEqual(content, content);
 	}).then(() => readFile(fullpath, {encoding: "utf8"})).then((content) => {
 		t.is(typeof content, "string");
-		t.deepEqual(content, "content of " + filepath);
+		t.deepEqual(content, content);
 	}));
 };
 
@@ -36,10 +37,11 @@ test("MemAdapter: readFile", (t) => {
 	const fs = fsInterface(memAdapter);
 	const readFile = promisify(fs.readFile);
 
+	const fsPath = path.join("/", "foo.txt");
 	return memAdapter.write(new Resource({
 		path: "/foo.txt",
-		string: "content of /foo.txt"
-	})).then(() => assertReadFile(t, readFile, "", "/foo.txt"));
+		string: `content of ${fsPath}`
+	})).then(() => assertReadFile(t, readFile, "", fsPath));
 });
 
 test("FsAdapter: readFile", (t) => {
@@ -50,17 +52,18 @@ test("FsAdapter: readFile", (t) => {
 	const fs = fsInterface(fsAdapter);
 	const readFile = promisify(fs.readFile);
 
-	return assertReadFile(t, readFile, "", "/foo.txt");
+	return assertReadFile(t, readFile, "", path.join("/", "foo.txt"), "content");
 });
 
 test("fs: readFile", (t) => {
 	const readFile = promisify(fs.readFile);
-	return assertReadFile(t, readFile, path.join(__dirname, "..", "fixtures", "fsInterface"), "/foo.txt");
+	return assertReadFile(t, readFile,
+		path.join(__dirname, "..", "fixtures", "fsInterface"), path.join("/", "foo.txt"), "content");
 });
 
 
 const assertStat = (t, stat, basepath, filepath) => {
-	const fullpath = basepath + filepath;
+	const fullpath = path.join(basepath, filepath);
 	return stat(fullpath).then((stats) => {
 		t.is(stats.isFile(), true);
 		t.is(stats.isDirectory(), false);
@@ -79,10 +82,11 @@ test("MemAdapter: stat", (t) => {
 	const fs = fsInterface(memAdapter);
 	const stat = promisify(fs.stat);
 
+	const fsPath = path.join("/", "foo.txt");
 	return memAdapter.write(new Resource({
 		path: "/foo.txt",
-		string: "content of /foo.txt"
-	})).then(() => assertStat(t, stat, "", "/foo.txt"));
+		string: `content of ${fsPath}`
+	})).then(() => assertStat(t, stat, "", fsPath));
 });
 
 test("FsAdapter: stat", (t) => {
@@ -93,12 +97,12 @@ test("FsAdapter: stat", (t) => {
 	const fs = fsInterface(fsAdapter);
 	const stat = promisify(fs.stat);
 
-	return assertStat(t, stat, "", "/foo.txt");
+	return assertStat(t, stat, "", path.join("/", "foo.txt"));
 });
 
 test("fs: stat", (t) => {
 	const stat = promisify(fs.stat);
-	return assertStat(t, stat, path.join(__dirname, "..", "fixtures", "fsInterface"), "/foo.txt");
+	return assertStat(t, stat, path.join(__dirname, "..", "fixtures", "fsInterface"), path.join("/", "foo.txt"));
 });
 
 test("MemAdapter: mkdir", async (t) => {