diff --git a/.github/workflows/mocha.yaml b/.github/workflows/mocha.yaml
index b554839..e9c7948 100644
--- a/.github/workflows/mocha.yaml
+++ b/.github/workflows/mocha.yaml
@@ -1,11 +1,11 @@
 name: Mocha
 
 on:
-  workflow_run:
-    workflows:
-      - ESLint
-    types:
-      - completed
+  # workflow_run:
+  #   workflows:
+  #     - ESLint
+  #   types:
+  #     - completed
   pull_request:
     branches:
       - main
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 9e2b4d1..5c07ece 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -1,11 +1,11 @@
 name: Release
 
 on:
-  # workflow_run:
-  #   workflows:
-  #     - Mocha
-  #   types:
-  #     - completed
+  workflow_run:
+    workflows:
+      - Mocha
+    types:
+      - completed
   push:
     branches:
       - main
diff --git a/specs/creators/at-rule.spec.js b/specs/creators/at-rule.spec.js
new file mode 100644
index 0000000..4a1fbea
--- /dev/null
+++ b/specs/creators/at-rule.spec.js
@@ -0,0 +1,20 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+
+import createAtRule from '../../src/creators/at-rule.js';
+
+describe('Create At Rule', () => {
+  it('create an object with args (name: String, hasBlock: true)', () => {
+    const rule = createAtRule('test-rule', true);
+
+    expect(rule).to.have.property('name', 'test-rule');
+    expect(rule).to.have.property('hasBlock', true);
+  });
+
+  it('create an object with args (name: String, hasBlock: false)', () => {
+    const rule = createAtRule('test-rule', false);
+
+    expect(rule).to.have.property('name', 'test-rule');
+    expect(rule).to.have.property('hasBlock', false);
+  });
+});
diff --git a/specs/creators/logical-group.spec.js b/specs/creators/logical-group.spec.js
new file mode 100644
index 0000000..1ba7126
--- /dev/null
+++ b/specs/creators/logical-group.spec.js
@@ -0,0 +1,14 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+
+import createLogicalGroup from '../../src/creators/logical-group.js';
+
+describe('Create Logical Group', () => {
+  it('create an object with args (groupName: String, properties: Array)', () => {
+    const properties = ['display', 'z-index'];
+    const logicalGroup = createLogicalGroup('Test Group Name', properties);
+
+    expect(logicalGroup).to.have.property('groupName', 'Test Group Name');
+    expect(logicalGroup).to.have.property('properties', properties);
+  });
+});
diff --git a/specs/creators/rule.spec.js b/specs/creators/rule.spec.js
new file mode 100644
index 0000000..051d9ed
--- /dev/null
+++ b/specs/creators/rule.spec.js
@@ -0,0 +1,42 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+
+import createRule from '../../src/creators/rule.js';
+
+describe('Create Rule', () => {
+  it('create an object with args (selector: String, [::pseudo-element])', () => {
+    const rule = createRule('::pseudo-element');
+
+    expect(rule).to.have.property('selector', '&::pseudo-element');
+  });
+
+  it('create an object with args (selector: String, [:pseudo-class])', () => {
+    const rule = createRule(':pseudo-class');
+
+    expect(rule).to.have.property('selector', '&:pseudo-class');
+  });
+
+  it('create an object with args (selector: RegExp, [\\[[^\\[\\]]+\\]])', () => {
+    const rule = createRule('\\[[^\\[\\]]+\\]');
+
+    expect(rule).to.have.property('selector', '&\\[[^\\[\\]]+\\]');
+  });
+
+  it('create an object with args (selector: RegExp, [\\..+])', () => {
+    const rule = createRule('\\..+');
+
+    expect(rule).to.have.property('selector', '&\\..+');
+  });
+
+  it('create an object with args (selector: RegExp, [--.+])', () => {
+    const rule = createRule('--.+');
+
+    expect(rule).to.have.property('selector', '&--.+');
+  });
+
+  it('create an object with args (selector: RegExp, [?.* &])', () => {
+    const rule = createRule('?.* &');
+
+    expect(rule).to.have.property('selector', '&?.* &');
+  });
+});
diff --git a/specs/index.spec.js b/specs/index.spec.js
deleted file mode 100644
index a5fa478..0000000
--- a/specs/index.spec.js
+++ /dev/null
@@ -1 +0,0 @@
-console.log('Tests');
diff --git a/specs/regex/bem-pattern.spec.js b/specs/regex/bem-pattern.spec.js
new file mode 100644
index 0000000..b7598da
--- /dev/null
+++ b/specs/regex/bem-pattern.spec.js
@@ -0,0 +1,24 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+
+import CSSRules from '../../src/rules/css.js';
+
+describe('BEM Class Pattern', () => {
+  const BEMClassPattern = new RegExp(CSSRules['selector-class-pattern'][0]);
+
+  it('block (String, [block])', () => {
+    expect('block').to.match(BEMClassPattern);
+  });
+
+  it('block with modifier (String, [block--modifier])', () => {
+    expect('block--modifier').to.match(BEMClassPattern);
+  });
+
+  it('block and element (String, [block__element])', () => {
+    expect('block__element').to.match(BEMClassPattern);
+  });
+
+  it('block and element with modifier (String, [block__element--modifier])', () => {
+    expect('block__element--modifier').to.match(BEMClassPattern);
+  });
+});
diff --git a/specs/regex/regex.spec.js b/specs/regex/regex.spec.js
new file mode 100644
index 0000000..dc5ddf7
--- /dev/null
+++ b/specs/regex/regex.spec.js
@@ -0,0 +1,22 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+
+import REGEXP from '../../src/utils/regexps.js';
+
+describe('Nested Selectors Pattern', () => {
+  it('nested (String, [&[attribute]])', () => {
+    expect('&[attribute]').to.match(new RegExp(`&${REGEXP.NESTED.ATTRIBUTE}`));
+  });
+
+  it('nested (String, [&.class])', () => {
+    expect('&.class').to.match(new RegExp(`&${REGEXP.NESTED.CLASS}`));
+  });
+
+  it('nested (String, [&--modifier])', () => {
+    expect('&--modifier').to.match(new RegExp(`&${REGEXP.NESTED.MODIFIER}`));
+  });
+
+  it('nested (String, [.class &])', () => {
+    expect('.class &').to.match(new RegExp(`&${REGEXP.NESTED.PARENT}`));
+  });
+});
diff --git a/src/utils/create-at-rule.js b/src/creators/at-rule.js
similarity index 100%
rename from src/utils/create-at-rule.js
rename to src/creators/at-rule.js
diff --git a/src/utils/create-logical-group.js b/src/creators/logical-group.js
similarity index 100%
rename from src/utils/create-logical-group.js
rename to src/creators/logical-group.js
diff --git a/src/utils/create-rule.js b/src/creators/rule.js
similarity index 100%
rename from src/utils/create-rule.js
rename to src/creators/rule.js
diff --git a/src/properties/order.js b/src/properties/order.js
index ce79b7f..23fe9f9 100644
--- a/src/properties/order.js
+++ b/src/properties/order.js
@@ -4,9 +4,9 @@ import nonStandard from './non-standard.js';
 
 import REGEXP from '../utils/regexps.js';
 
-import createLogicalGroup from '../utils/create-logical-group.js';
-import createAtRule from '../utils/create-at-rule.js';
-import createRule from '../utils/create-rule.js';
+import createLogicalGroup from '../creators/logical-group.js';
+import createAtRule from '../creators/at-rule.js';
+import createRule from '../creators/rule.js';
 
 const propertiesOrder = {
   'order/order': [