diff --git a/lib/bemxjst/utils.js b/lib/bemxjst/utils.js
index 8e7ce5b7..48c067e9 100644
--- a/lib/bemxjst/utils.js
+++ b/lib/bemxjst/utils.js
@@ -78,3 +78,31 @@ exports.identify = function identify(obj, onlyGet) {
   obj[uniqExpando] = u;
   return u;
 };
+
+exports.fnToString = function fnToString(code) {
+  // It is fine to compile without templates at first
+  if (!code)
+    return '';
+
+  if (typeof code === 'function') {
+    // Examples:
+    //   function () { … }
+    //   function name() { … }
+    //   function (a, b) { … }
+    //   function name(a, b) { … }
+    var regularFunction = /^function\s*[^{]+{|}$/g;
+
+    // Examples:
+    //   () => { … }
+    //   (a, b) => { … }
+    //   _ => { … }
+    var arrowFunction = /^(_|\(\w|[^=>]+\))\s=>\s{|}$/g;
+
+    code = code.toString();
+    code = code.replace(
+      code.indexOf('function') === 0 ? regularFunction : arrowFunction,
+    '');
+  }
+
+  return code;
+};
diff --git a/lib/compiler.js b/lib/compiler.js
index 6e50cbe4..8b2f4e16 100644
--- a/lib/compiler.js
+++ b/lib/compiler.js
@@ -1,5 +1,6 @@
 var vm = require('vm');
 var BEMXJSTError = require('./bemxjst/error').BEMXJSTError;
+var fnToString = require('./bemxjst/utils').fnToString;
 
 function Compiler(runtime) {
   this.runtime = runtime;
@@ -10,30 +11,7 @@ exports.Compiler = Compiler;
 Compiler.prototype.generate = function generate(code, options) {
   if (!options) options = {};
 
-  // It is fine to compile without templates at first
-  if (!code)
-    code = '';
-
-  // Yeah, let people pass functions to us!
-  if (typeof code === 'function') {
-    // Examples:
-    //   function () { … }
-    //   function name() { … }
-    //   function (a, b) { … }
-    //   function name(a, b) { … }
-    var regularFunction = /^function\s*[^{]+{|}$/g;
-
-    // Examples:
-    //   () => { … }
-    //   (a, b) => { … }
-    //   _ => { … }
-    var arrowFunction = /^(_|\(\w|[^=>]+\))\s=>\s{|}$/g;
-
-    code = code.toString();
-    code = code.replace(
-      code.indexOf('function') === 0 ? regularFunction : arrowFunction,
-    '');
-  }
+  code = fnToString(code);
 
   var exportName = options.exportName || 'BEMHTML';
   var engine = options.engine || 'BEMHTML';
@@ -97,3 +75,22 @@ Compiler.prototype.compile = function compile(code, options) {
 
   return exports;
 };
+
+Compiler.prototype._compile = function _compile(code, options) {
+  if (!options) options = {};
+
+  // It is fine to compile without templates at first
+  if (!code)
+    code = function() {};
+
+  var engineName = options.engine || 'BEMHTML';
+
+  var Engine = require('./' + engineName.toLowerCase());
+  var api = new Engine(options);
+
+  var template = {};
+  api.compile(code);
+  api.exportApply(template);
+
+  return template;
+};
diff --git a/package.json b/package.json
index 51309fc0..da8713dc 100644
--- a/package.json
+++ b/package.json
@@ -20,14 +20,14 @@
   "scripts": {
     "prepublish": "npm run make",
     "preversion": "bash scripts/update-authors.sh && git add AUTHORS && git commit -m \"update AUTHORS\" || true",
-    "make-bemhtml": "browserify --standalone bemhtml lib/bemhtml/index.js -o lib/bemhtml/bundle.js",
-    "make-bemtree": "browserify --standalone bemtree lib/bemtree/index.js -o lib/bemtree/bundle.js",
-    "make": "npm run make-bemhtml && npm run make-bemtree",
+    "make": "npm run make:bemhtml && npm run make:bemtree",
+    "make:bemhtml": "browserify --standalone bemhtml lib/bemhtml/index.js -o lib/bemhtml/bundle.js --debug",
+    "make:bemtree": "browserify --standalone bemtree lib/bemtree/index.js -o lib/bemtree/bundle.js --debug",
     "clean": "rm -f lib/bem{html,tree}/bundle.js",
-    "lint": "jscs `ls lib/*.js lib/**/*.js test/*.js | grep -v bundle` && jshint `ls lib/*.js lib/**/*.js test/*.js | grep -v bundle`",
-    "mocha-test": "mocha --reporter=spec test/*-test.js",
-    "test": "npm run make && npm run lint && npm run coverage",
-    "coverage": "./node_modules/.bin/istanbul cover ./node_modules/mocha/bin/_mocha -- -u bdd -R spec --recursive test/*-test.js"
+    "test": "npm run make && npm run test:lint && npm run test:coverage",
+    "test:lint": "jscs `ls lib/*.js lib/**/*.js test/*.js | grep -v bundle` && jshint `ls lib/*.js lib/**/*.js test/*.js | grep -v bundle`",
+    "test:mocha": "mocha --reporter=spec test/*-test.js",
+    "test:coverage": "./node_modules/.bin/istanbul cover ./node_modules/mocha/bin/_mocha -- -u bdd -R spec test/*-test.js"
   },
   "repository": {
     "type": "git",
@@ -46,11 +46,11 @@
   },
   "devDependencies": {
     "browserify": "^13.0.1",
+    "istanbul": "0.4.4",
+    "chai": "3.5.0",
     "jscs": "^3.0.3",
     "jshint": "^2.7.0",
-    "mocha": "2.5.3",
-    "chai": "3.5.0",
-    "istanbul": "0.4.x"
+    "mocha": "2.5.3"
   },
   "author": "Fedor Indutny <fedor@indutny.com>",
   "maintainers": [
diff --git a/test/bemtree-test.js b/test/bemtree-test.js
index 5cdfbb9d..33beafc3 100644
--- a/test/bemtree-test.js
+++ b/test/bemtree-test.js
@@ -1,7 +1,13 @@
 var assert = require('assert');
 var fixtures = require('./fixtures')('bemtree');
 var bemxjst = require('../index').bemtree;
-var test = fixtures.test;
+var fixturesTest = fixtures.test;
+
+var test = function(fn, data, expected) {
+  return fixturesTest(fn, data, expected, {
+    engine: 'BEMTREE'
+  });
+};
 
 describe('BEMTREE engine tests', function() {
   describe('applyNext()', function() {
diff --git a/test/fixtures.js b/test/fixtures.js
index 154ab48e..800cd5fe 100644
--- a/test/fixtures.js
+++ b/test/fixtures.js
@@ -6,7 +6,7 @@ require('chai').should();
 module.exports = function(engine) {
   function fail(fn, regexp) {
     assert.throws(function() {
-      bemxjst[engine].compile(fn);
+      bemxjst[engine]._compile(fn);
     }, regexp);
   }
 
@@ -15,7 +15,8 @@ module.exports = function(engine) {
       options = fn;
       fn = function() {};
     }
-    return bemxjst[engine].compile(fn, options || {});
+
+    return bemxjst[engine]._compile(fn, options || {});
   }
 
   /**