diff --git a/lib/middleware/MiddlewareManager.js b/lib/middleware/MiddlewareManager.js
index a6ac2001..e3c6b04d 100644
--- a/lib/middleware/MiddlewareManager.js
+++ b/lib/middleware/MiddlewareManager.js
@@ -108,16 +108,7 @@ class MiddlewareManager {
 		await this.addMiddleware("discovery", {
 			mountPath: "/discovery"
 		});
-		await this.addMiddleware("serveResources", {
-			wrapperCallback: (serveResourcesModule) => {
-				return ({resources}) => {
-					return serveResourcesModule({
-						resources,
-						tree: this.tree
-					});
-				};
-			}
-		});
+		await this.addMiddleware("serveResources");
 		await this.addMiddleware("serveThemes");
 		await this.addMiddleware("versionInfo", {
 			mountPath: "/resources/sap-ui-version.json",
diff --git a/lib/middleware/serveResources.js b/lib/middleware/serveResources.js
index 62e88a15..50c02e45 100644
--- a/lib/middleware/serveResources.js
+++ b/lib/middleware/serveResources.js
@@ -23,7 +23,7 @@ function isFresh(req, res) {
  * @param {module:@ui5/fs.AbstractReader} resources.all Resource collection which contains the workspace and the project dependencies
  * @returns {Function} Returns a server middleware closure.
  */
-function createMiddleware({resources, tree: project}) {
+function createMiddleware({resources}) {
 	return async function serveResources(req, res, next) {
 		try {
 			const pathname = parseurl(req).pathname;
@@ -43,7 +43,9 @@ function createMiddleware({resources, tree: project}) {
 			if (rProperties.test(resourcePath)) {
 				// Special handling for *.properties files escape non ascii characters.
 				const nonAsciiEscaper = require("@ui5/builder").processors.nonAsciiEscaper;
-				const propertiesFileSourceEncoding = project && project.resources && project.resources.configuration && project.resources.configuration.propertiesFileSourceEncoding;
+				const project = resource._project; // _project might not be defined
+				const propertiesFileSourceEncoding = project && project.resources &&
+					project.resources.configuration && project.resources.configuration.propertiesFileSourceEncoding;
 				const encoding = nonAsciiEscaper.getEncodingFromAlias(propertiesFileSourceEncoding || "ISO-8859-1");
 				await nonAsciiEscaper({
 					resources: [resource], options: {
diff --git a/test/lib/server/middleware/serveResources.js b/test/lib/server/middleware/serveResources.js
index 542aacc8..65b60ee3 100644
--- a/test/lib/server/middleware/serveResources.js
+++ b/test/lib/server/middleware/serveResources.js
@@ -2,7 +2,7 @@ const test = require("ava");
 const sinon = require("sinon");
 const resourceFactory = require("@ui5/fs").resourceFactory;
 const serveResourcesMiddleware = require("../../../../lib/middleware/serveResources");
-const writeResource = function(writer, path, size, stringContent) {
+const writeResource = function(writer, path, size, stringContent, project) {
 	const statInfo = {
 		ino: 0,
 		ctime: new Date(),
@@ -12,7 +12,12 @@ const writeResource = function(writer, path, size, stringContent) {
 			return false;
 		}
 	};
-	const resource = resourceFactory.createResource({path, buffer: Buffer.from(stringContent, "latin1"), statInfo});
+	const resource = resourceFactory.createResource({
+		path,
+		buffer: Buffer.from(stringContent, "latin1"),
+		statInfo,
+		project
+	});
 	// stub resource functionality in order to be able to get the Resource's content. Otherwise it would be drained.
 	sinon.stub(resource, "getStream").returns({
 		pipe: function() {
@@ -32,89 +37,90 @@ test.afterEach.always((t) => {
 	sinon.restore();
 });
 
-
 test.serial("Check if properties file is served properly", (t) => {
 	t.plan(4);
 
 	const readerWriter = resourceFactory.createAdapter({virBasePath: "/"});
+	const project = {
+		resources: {
+			configuration: {
+				propertiesFileSourceEncoding: "ISO-8859-1"
+			}
+		}
+	};
 
-	return writeResource(readerWriter, "/myFile3.properties", 1024 * 1024, "key=titel\nfame=straße").then((resource) => {
-		const setStringSpy = sinon.spy(resource, "setString");
-		const middleware = serveResourcesMiddleware({
-			resources: {
-				all: readerWriter
-			},
-			tree: {
+	return writeResource(readerWriter, "/myFile3.properties", 1024 * 1024, "key=titel\nfame=straße", project)
+		.then((resource) => {
+			const setStringSpy = sinon.spy(resource, "setString");
+			const middleware = serveResourcesMiddleware({
 				resources: {
-					configuration: {
-						propertiesFileSourceEncoding: "ISO-8859-1"
-					}
+					all: readerWriter
 				}
-			}
-		});
-
-		const response = fakeResponse;
-
-		const setHeaderSpy = sinon.spy(response, "setHeader");
-		const req = {
-			url: "/myFile3.properties",
-			headers: {}
-		};
-		const next = function(err) {
-			throw new Error(`Next callback called with error: ${err.message}`);
-		};
-		return middleware(req, response, next).then((o) => {
-			return resource.getString();
-		}).then((content) => {
-			t.is(content, `key=titel
+			});
+
+			const response = fakeResponse;
+
+			const setHeaderSpy = sinon.spy(response, "setHeader");
+			const req = {
+				url: "/myFile3.properties",
+				headers: {}
+			};
+			const next = function(err) {
+				throw new Error(`Next callback called with error: ${err.message}`);
+			};
+			return middleware(req, response, next).then((o) => {
+				return resource.getString();
+			}).then((content) => {
+				t.is(content, `key=titel
 fame=stra\\u00dfe`);
-			t.is(setHeaderSpy.callCount, 2);
-			t.is(setStringSpy.callCount, 1);
-			t.is(setHeaderSpy.getCall(0).lastArg, "application/octet-stream");
+				t.is(setHeaderSpy.callCount, 2);
+				t.is(setStringSpy.callCount, 1);
+				t.is(setHeaderSpy.getCall(0).lastArg, "application/octet-stream");
+			});
 		});
-	});
 });
 
 test.serial("Check if properties file is served properly with UTF-8", (t) => {
 	t.plan(4);
 
 	const readerWriter = resourceFactory.createAdapter({virBasePath: "/"});
+	const project = {
+		resources: {
+			configuration: {
+				propertiesFileSourceEncoding: "UTF-8"
+			}
+		}
+	};
 
-	return writeResource(readerWriter, "/myFile3.properties", 1024 * 1024, "key=titel\nfame=straße").then((resource) => {
-		const setStringSpy = sinon.spy(resource, "setString");
-		const middleware = serveResourcesMiddleware({
-			resources: {
-				all: readerWriter
-			},
-			tree: {
+	return writeResource(readerWriter, "/myFile3.properties", 1024 * 1024, "key=titel\nfame=straße", project)
+		.then((resource) => {
+			const setStringSpy = sinon.spy(resource, "setString");
+			const middleware = serveResourcesMiddleware({
 				resources: {
-					configuration: {
-						propertiesFileSourceEncoding: "UTF-8"
-					}
+					all: readerWriter
 				}
-			}
-		});
-
-		const response = fakeResponse;
-
-		const setHeaderSpy = sinon.spy(response, "setHeader");
-		const req = {
-			url: "/myFile3.properties",
-			headers: {}
-		};
-		const next = function(err) {
-			throw new Error(`Next callback called with error: ${err.message}`);
-		};
-		return middleware(req, response, next).then((o) => {
-			return resource.getString();
-		}).then((content) => {
-			t.is(content, `key=titel
+			});
+
+			const response = fakeResponse;
+
+			const setHeaderSpy = sinon.spy(response, "setHeader");
+			const req = {
+				url: "/myFile3.properties",
+				headers: {}
+			};
+			const next = function(err) {
+				throw new Error(`Next callback called with error: ${err.message}`);
+			};
+			return middleware(req, response, next).then((o) => {
+				return resource.getString();
+			}).then((content) => {
+				t.is(content, `key=titel
 fame=stra\\ufffde`);
-			t.is(setHeaderSpy.callCount, 2);
-			t.is(setStringSpy.callCount, 1);
-			t.is(setHeaderSpy.getCall(0).lastArg, "application/octet-stream");
+				t.is(setHeaderSpy.callCount, 2);
+				t.is(setStringSpy.callCount, 1);
+				t.is(setHeaderSpy.getCall(0).lastArg, "application/octet-stream");
+			});
 		});
-	});
 });
 
 test.serial("Check if properties file is served properly without property setting", (t) => {