diff --git a/test/stringify/common.test.js b/test/stringify/common.test.js
new file mode 100644
index 0000000..6336eea
--- /dev/null
+++ b/test/stringify/common.test.js
@@ -0,0 +1,7 @@
+const test = require('ava');
+
+const stringify = require('../../lib/stringify');
+
+test('should throws error if no format given', t => {
+    t.throws(() => stringify({ entity: { block: 'block' }, tech: null }), 'You must declare target format');
+});
diff --git a/test/stringify/enb.test.js b/test/stringify/enb.test.js
index 53d5566..5e75fc7 100644
--- a/test/stringify/enb.test.js
+++ b/test/stringify/enb.test.js
@@ -2,10 +2,6 @@ const test = require('ava');
 
 const stringify = require('../../lib/stringify');
 
-test('should throws error if no format given', t => {
-    t.throws(() => stringify({ entity: { block: 'block' }, tech: null }), 'You must declare target format');
-});
-
 test('should stringify enb declaration', t => {
     const obj = [{ block: 'block', elem: 'elem', mod: 'mod', val: 'val' }];
     t.deepEqual(
diff --git a/test/stringify/v1.test.js b/test/stringify/v1.test.js
new file mode 100644
index 0000000..e504593
--- /dev/null
+++ b/test/stringify/v1.test.js
@@ -0,0 +1,25 @@
+const test = require('ava');
+
+const stringify = require('../../lib/stringify');
+
+test('should stringify enb declaration', t => {
+    const obj = [{
+        name: 'block',
+        elems: [{
+            name: 'elem',
+            mods: [{
+                name: 'mod',
+                vals: [{
+                    name: 'val'
+                }]
+            }]
+        }]
+    }];
+    t.deepEqual(
+        stringify(
+            { entity: { block: 'block', elem: 'elem', modName: 'mod', modVal: 'val' }, tech: null },
+            { format: 'v1' }
+        ),
+        'exports.blocks = ' + JSON.stringify(obj, null, 4) + ';\n'
+    );
+});