diff --git a/test/__snapshots__/localIdentName-option.test.js.snap b/test/__snapshots__/localIdentName-option.test.js.snap
new file mode 100644
index 000000000..591109662
--- /dev/null
+++ b/test/__snapshots__/localIdentName-option.test.js.snap
@@ -0,0 +1,169 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`localIdentName option should have hash: errors 1`] = `Array []`;
+
+exports[`localIdentName option should have hash: locals 1`] = `
+Object {
+  "_test": "localIdentName--_test--3Q--B",
+  "test": "localIdentName--test--1Os7J",
+}
+`;
+
+exports[`localIdentName option should have hash: module (evaluated) 1`] = `
+Array [
+  Array [
+    1,
+    ".localIdentName--test--1Os7J {
+  background: red;
+}
+
+.localIdentName--_test--3Q--B {
+  background: blue;
+}
+",
+    "",
+  ],
+]
+`;
+
+exports[`localIdentName option should have hash: warnings 1`] = `Array []`;
+
+exports[`localIdentName option should have path naming with context: errors 1`] = `Array []`;
+
+exports[`localIdentName option should have path naming with context: locals 1`] = `
+Object {
+  "_test": "fixtures-modules--localIdentName--_test",
+  "test": "fixtures-modules--localIdentName--test",
+}
+`;
+
+exports[`localIdentName option should have path naming with context: module (evaluated) 1`] = `
+Array [
+  Array [
+    1,
+    ".fixtures-modules--localIdentName--test {
+  background: red;
+}
+
+.fixtures-modules--localIdentName--_test {
+  background: blue;
+}
+",
+    "",
+  ],
+]
+`;
+
+exports[`localIdentName option should have path naming with context: warnings 1`] = `Array []`;
+
+exports[`localIdentName option should prefixes leading hyphen + digit with underscore: errors 1`] = `Array []`;
+
+exports[`localIdentName option should prefixes leading hyphen + digit with underscore: locals 1`] = `
+Object {
+  "_test": "_-1_test",
+  "test": "_-1test",
+}
+`;
+
+exports[`localIdentName option should prefixes leading hyphen + digit with underscore: module (evaluated) 1`] = `
+Array [
+  Array [
+    1,
+    "._-1test {
+  background: red;
+}
+
+._-1_test {
+  background: blue;
+}
+",
+    "",
+  ],
+]
+`;
+
+exports[`localIdentName option should prefixes leading hyphen + digit with underscore: warnings 1`] = `Array []`;
+
+exports[`localIdentName option should prefixes two leading hyphens with underscore: errors 1`] = `Array []`;
+
+exports[`localIdentName option should prefixes two leading hyphens with underscore: locals 1`] = `
+Object {
+  "_test": "_--_test",
+  "test": "_--test",
+}
+`;
+
+exports[`localIdentName option should prefixes two leading hyphens with underscore: module (evaluated) 1`] = `
+Array [
+  Array [
+    1,
+    "._--test {
+  background: red;
+}
+
+._--_test {
+  background: blue;
+}
+",
+    "",
+  ],
+]
+`;
+
+exports[`localIdentName option should prefixes two leading hyphens with underscore: warnings 1`] = `Array []`;
+
+exports[`localIdentName option should saves underscore prefix in exported class names: errors 1`] = `Array []`;
+
+exports[`localIdentName option should saves underscore prefix in exported class names: locals 1`] = `
+Object {
+  "_test": "_test",
+  "test": "test",
+}
+`;
+
+exports[`localIdentName option should saves underscore prefix in exported class names: module (evaluated) 1`] = `
+Array [
+  Array [
+    1,
+    ".test {
+  background: red;
+}
+
+._test {
+  background: blue;
+}
+",
+    "",
+  ],
+]
+`;
+
+exports[`localIdentName option should saves underscore prefix in exported class names: warnings 1`] = `Array []`;
+
+exports[`localIdentName option should use hash prefix: errors 1`] = `Array []`;
+
+exports[`localIdentName option should use hash prefix: locals 1`] = `
+Object {
+  "_test": "_test--d745495d407559ef605c9072243801fd",
+  "test": "test--307c32aa793aaec9aecded85a9fdd448",
+}
+`;
+
+exports[`localIdentName option should use hash prefix: module (evaluated) 1`] = `
+Array [
+  Array [
+    1,
+    ".test--307c32aa793aaec9aecded85a9fdd448 {
+  background: red;
+}
+
+._test--d745495d407559ef605c9072243801fd {
+  background: blue;
+}
+",
+    "",
+  ],
+]
+`;
+
+exports[`localIdentName option should use hash prefix: warnings 1`] = `Array []`;
diff --git a/test/fixtures/modules/localIdentName.css b/test/fixtures/modules/localIdentName.css
new file mode 100644
index 000000000..cc5433be3
--- /dev/null
+++ b/test/fixtures/modules/localIdentName.css
@@ -0,0 +1,7 @@
+:local(.test) {
+  background: red;
+}
+
+:local(._test) {
+  background: blue;
+}
diff --git a/test/localIdentName-option.test.js b/test/localIdentName-option.test.js
new file mode 100644
index 000000000..1444b8bf2
--- /dev/null
+++ b/test/localIdentName-option.test.js
@@ -0,0 +1,107 @@
+const path = require('path');
+
+const { webpack, evaluated } = require('./helpers');
+
+describe('localIdentName option', () => {
+  it('should have hash', async () => {
+    const config = {
+      loader: {
+        options: {
+          localIdentName: '[name]--[local]--[hash:base64:5]',
+          context: path.resolve(__dirname),
+        },
+      },
+    };
+    const testId = './modules/localIdentName.css';
+    const stats = await webpack(testId, config);
+    const { modules } = stats.toJson();
+    const module = modules.find((m) => m.id === testId);
+    const evaluatedModule = evaluated(module.source, modules);
+
+    expect(evaluatedModule).toMatchSnapshot('module (evaluated)');
+    expect(evaluatedModule.locals).toMatchSnapshot('locals');
+    expect(stats.compilation.warnings).toMatchSnapshot('warnings');
+    expect(stats.compilation.errors).toMatchSnapshot('errors');
+  });
+
+  it('should have path naming with context', async () => {
+    const config = {
+      loader: {
+        options: {
+          localIdentName: '[path]-[name]--[local]',
+          context: path.resolve(__dirname),
+        },
+      },
+    };
+    const testId = './modules/localIdentName.css';
+    const stats = await webpack(testId, config);
+    const { modules } = stats.toJson();
+    const module = modules.find((m) => m.id === testId);
+    const evaluatedModule = evaluated(module.source, modules);
+
+    expect(evaluatedModule).toMatchSnapshot('module (evaluated)');
+    expect(evaluatedModule.locals).toMatchSnapshot('locals');
+    expect(stats.compilation.warnings).toMatchSnapshot('warnings');
+    expect(stats.compilation.errors).toMatchSnapshot('errors');
+  });
+
+  it('should use hash prefix', async () => {
+    const config = {
+      loader: {
+        options: { localIdentName: '[local]--[hash]', hashPrefix: 'x' },
+      },
+    };
+    const testId = './modules/localIdentName.css';
+    const stats = await webpack(testId, config);
+    const { modules } = stats.toJson();
+    const module = modules.find((m) => m.id === testId);
+    const evaluatedModule = evaluated(module.source, modules);
+
+    expect(evaluatedModule).toMatchSnapshot('module (evaluated)');
+    expect(evaluatedModule.locals).toMatchSnapshot('locals');
+    expect(stats.compilation.warnings).toMatchSnapshot('warnings');
+    expect(stats.compilation.errors).toMatchSnapshot('errors');
+  });
+
+  it('should prefixes leading hyphen + digit with underscore', async () => {
+    const config = { loader: { options: { localIdentName: '-1[local]' } } };
+    const testId = './modules/localIdentName.css';
+    const stats = await webpack(testId, config);
+    const { modules } = stats.toJson();
+    const module = modules.find((m) => m.id === testId);
+    const evaluatedModule = evaluated(module.source, modules);
+
+    expect(evaluatedModule).toMatchSnapshot('module (evaluated)');
+    expect(evaluatedModule.locals).toMatchSnapshot('locals');
+    expect(stats.compilation.warnings).toMatchSnapshot('warnings');
+    expect(stats.compilation.errors).toMatchSnapshot('errors');
+  });
+
+  it('should prefixes two leading hyphens with underscore', async () => {
+    const config = { loader: { options: { localIdentName: '--[local]' } } };
+    const testId = './modules/localIdentName.css';
+    const stats = await webpack(testId, config);
+    const { modules } = stats.toJson();
+    const module = modules.find((m) => m.id === testId);
+    const evaluatedModule = evaluated(module.source, modules);
+
+    expect(evaluatedModule).toMatchSnapshot('module (evaluated)');
+    expect(evaluatedModule.locals).toMatchSnapshot('locals');
+    expect(stats.compilation.warnings).toMatchSnapshot('warnings');
+    expect(stats.compilation.errors).toMatchSnapshot('errors');
+  });
+
+  it('should saves underscore prefix in exported class names', async () => {
+    const config = { loader: { options: { localIdentName: '[local]' } } };
+    const testId = './modules/localIdentName.css';
+    const stats = await webpack(testId, config);
+    const { modules } = stats.toJson();
+    const module = modules.find((m) => m.id === testId);
+    const evaluatedModule = evaluated(module.source, modules);
+
+    expect(evaluatedModule).toMatchSnapshot('module (evaluated)');
+    expect(evaluatedModule.locals).toMatchSnapshot('locals');
+    expect(stats.compilation.warnings).toMatchSnapshot('warnings');
+    expect(stats.compilation.errors).toMatchSnapshot('errors');
+  });
+});
diff --git a/test/modules-option.test.js b/test/modules-option.test.js
index 4a47f93b0..6c39e6791 100644
--- a/test/modules-option.test.js
+++ b/test/modules-option.test.js
@@ -21,8 +21,6 @@ describe('modules option', () => {
         const module = modules.find((m) => m.id === testId);
         const evaluatedModule = evaluated(module.source, modules);
 
-        // console.log(module)
-
         expect(evaluatedModule).toMatchSnapshot('module (evaluated)');
         expect(evaluatedModule.locals).toMatchSnapshot('locals');
         expect(stats.compilation.warnings).toMatchSnapshot('warnings');