diff --git a/.eslintrc.yml b/.eslintrc.yml
index 473a6b7..9263db0 100644
--- a/.eslintrc.yml
+++ b/.eslintrc.yml
@@ -1 +1 @@
-extends: '.'
+extends: './javascript.js'
diff --git a/__snapshots__/test.js.snap b/__snapshots__/test.js.snap
index ea9b188..0acc5cb 100644
--- a/__snapshots__/test.js.snap
+++ b/__snapshots__/test.js.snap
@@ -1,6 +1,6 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`lints all fixtures: component.js 1`] = `
+exports[`lints all JS fixtures: component.js 1`] = `
 Array [
   Object {
     "column": 7,
@@ -12,11 +12,9 @@ Array [
 ]
 `;
 
-exports[`lints all fixtures: exports.js 1`] = `Array []`;
+exports[`lints all JS fixtures: exports.js 1`] = `Array []`;
 
-exports[`lints all fixtures: exports.ts 1`] = `Array []`;
-
-exports[`lints all fixtures: import.js 1`] = `
+exports[`lints all JS fixtures: import.js 1`] = `
 Array [
   Object {
     "column": 25,
@@ -32,22 +30,17 @@ Array [
     "rule": "import/no-unresolved",
     "severity": 2,
   },
-]
-`;
-
-exports[`lints all fixtures: import.ts 1`] = `
-Array [
   Object {
-    "column": 27,
-    "line": 2,
-    "message": "Unable to resolve path to module './nonexistent'.",
-    "rule": "import/no-unresolved",
+    "column": 19,
+    "line": 5,
+    "message": "Useless path segments for \\"../js/exports\\", should be \\"./exports\\"",
+    "rule": "import/no-useless-path-segments",
     "severity": 2,
   },
 ]
 `;
 
-exports[`lints all fixtures: prop-types.js 1`] = `
+exports[`lints all JS fixtures: prop-types.js 1`] = `
 Array [
   Object {
     "column": 5,
@@ -73,26 +66,7 @@ Array [
 ]
 `;
 
-exports[`lints all fixtures: prop-types.tsx 1`] = `
-Array [
-  Object {
-    "column": 16,
-    "line": 4,
-    "message": "Missing return type on function.",
-    "rule": "@typescript-eslint/explicit-function-return-type",
-    "severity": 2,
-  },
-  Object {
-    "column": 3,
-    "line": 33,
-    "message": "defaultProp \\"requiredPropWithDefault\\" defined for isRequired propType.",
-    "rule": "react/default-props-match-prop-types",
-    "severity": 2,
-  },
-]
-`;
-
-exports[`lints all fixtures: variables.js 1`] = `
+exports[`lints all JS fixtures: variables.js 1`] = `
 Array [
   Object {
     "column": 24,
@@ -125,7 +99,47 @@ Array [
 ]
 `;
 
-exports[`lints all fixtures: variables.ts 1`] = `
+exports[`lints all TS fixtures: exports.ts 1`] = `Array []`;
+
+exports[`lints all TS fixtures: import.ts 1`] = `
+Array [
+  Object {
+    "column": 27,
+    "line": 2,
+    "message": "Unable to resolve path to module './nonexistent'.",
+    "rule": "import/no-unresolved",
+    "severity": 2,
+  },
+  Object {
+    "column": 19,
+    "line": 5,
+    "message": "Useless path segments for \\"../ts/exports\\", should be \\"./exports\\"",
+    "rule": "import/no-useless-path-segments",
+    "severity": 2,
+  },
+]
+`;
+
+exports[`lints all TS fixtures: prop-types.tsx 1`] = `
+Array [
+  Object {
+    "column": 16,
+    "line": 4,
+    "message": "Missing return type on function.",
+    "rule": "@typescript-eslint/explicit-function-return-type",
+    "severity": 2,
+  },
+  Object {
+    "column": 3,
+    "line": 33,
+    "message": "defaultProp \\"requiredPropWithDefault\\" defined for isRequired propType.",
+    "rule": "react/default-props-match-prop-types",
+    "severity": 2,
+  },
+]
+`;
+
+exports[`lints all TS fixtures: variables.ts 1`] = `
 Array [
   Object {
     "column": 24,
diff --git a/fixtures/component.js b/fixtures/js/component.js
similarity index 100%
rename from fixtures/component.js
rename to fixtures/js/component.js
diff --git a/fixtures/exports.js b/fixtures/js/exports.js
similarity index 100%
rename from fixtures/exports.js
rename to fixtures/js/exports.js
diff --git a/fixtures/import.js b/fixtures/js/import.js
similarity index 84%
rename from fixtures/import.js
rename to fixtures/js/import.js
index 116a42a..6c9d16e 100644
--- a/fixtures/import.js
+++ b/fixtures/js/import.js
@@ -2,4 +2,4 @@ import something, {foo, baz} from './exports' // baz is not exported
 import somethingElse from './nonexistent' // file does not exist
 
 export {foo, baz, something, somethingElse}
-export {bar} from './exports'
+export {bar} from '../js/exports'
diff --git a/fixtures/prop-types.js b/fixtures/js/prop-types.js
similarity index 100%
rename from fixtures/prop-types.js
rename to fixtures/js/prop-types.js
diff --git a/fixtures/variables.js b/fixtures/js/variables.js
similarity index 100%
rename from fixtures/variables.js
rename to fixtures/js/variables.js
diff --git a/fixtures/exports.ts b/fixtures/ts/exports.ts
similarity index 100%
rename from fixtures/exports.ts
rename to fixtures/ts/exports.ts
diff --git a/fixtures/import.ts b/fixtures/ts/import.ts
similarity index 84%
rename from fixtures/import.ts
rename to fixtures/ts/import.ts
index 116a42a..8f1390a 100644
--- a/fixtures/import.ts
+++ b/fixtures/ts/import.ts
@@ -2,4 +2,4 @@ import something, {foo, baz} from './exports' // baz is not exported
 import somethingElse from './nonexistent' // file does not exist
 
 export {foo, baz, something, somethingElse}
-export {bar} from './exports'
+export {bar} from '../ts/exports'
diff --git a/fixtures/prop-types.tsx b/fixtures/ts/prop-types.tsx
similarity index 100%
rename from fixtures/prop-types.tsx
rename to fixtures/ts/prop-types.tsx
diff --git a/fixtures/variables.ts b/fixtures/ts/variables.ts
similarity index 100%
rename from fixtures/variables.ts
rename to fixtures/ts/variables.ts
diff --git a/index.js b/index.js
index e993f43..5b4ac62 100644
--- a/index.js
+++ b/index.js
@@ -1,133 +1,28 @@
 module.exports = {
-  extends: ['airbnb', 'airbnb/hooks', 'prettier', 'prettier/react'],
-  plugins: ['prettier'],
-  parser: 'babel-eslint',
-  env: {
-    // allow browser globals
-    browser: true,
-  },
+  extends: [
+    require.resolve('./javascript'),
+    'plugin:@typescript-eslint/eslint-recommended',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:import/typescript',
+    'prettier/@typescript-eslint',
+  ],
   rules: {
-    // https://github.com/prettier/eslint-config-prettier#arrow-body-style-and-prefer-arrow-callback
-    'arrow-body-style': [2, 'as-needed', {requireReturnForObjectLiteral: false}],
-
-    // ensure that default, named, and namespaced imports have been exported by the target file
-    'import/default': 2,
-    'import/namespace': [2, {allowComputed: true}],
-
-    // require import groups to be ordered by specificity and separated by linebreaks
-    'import/order': [2, {'newlines-between': 'always'}],
-
-    // allow non-ID-linked <label>s to accomodate those containing linked <input>s
-    'jsx-a11y/label-has-for': 0,
-    'jsx-a11y/label-has-associated-control': [2, {assert: 'either'}],
-
-    // allow event listeners on static elements (e.g. onClick on divs)
-    'jsx-a11y/no-static-element-interactions': 0,
-
-    // https://github.com/prettier/eslint-config-prettier#arrow-body-style-and-prefer-arrow-callback
-    'prefer-arrow-callback': [2, {allowNamedFunctions: false, allowUnboundThis: true}],
-
-    'prettier/prettier': [
+    // upgrade severity from warning to error
+    '@typescript-eslint/explicit-function-return-type': [
       2,
-      {
-        printWidth: 100,
-        semi: false,
-        singleQuote: true,
-        trailingComma: 'es5',
-        bracketSpacing: false,
-      },
+      {allowExpressions: true, allowTypedFunctionExpressions: true},
     ],
-
-    // disallow .jsx files for consistency
-    'react/jsx-filename-extension': 0,
-
-    // allow function creation in render
-    'react/jsx-no-bind': 0,
-
-    // do not require default props for optional props
-    'react/require-default-props': 0,
-
-    'react/sort-comp': [
-      2,
-      {
-        order: [
-          'lifecycle-statics',
-          'static-methods',
-          'constructor',
-          'instance-variables',
-          'lifecycle-methods',
-          'everything-else',
-          'render',
-        ],
-        groups: {
-          'lifecycle-statics': [
-            'displayName',
-            'propTypes',
-            'contextTypes',
-            'childContextTypes',
-            'defaultProps',
-          ],
-          'lifecycle-methods': [
-            'state',
-            'getChildContext',
-            'getDerivedStateFromProps',
-            'componentWillMount',
-            'UNSAFE_componentWillMount',
-            'componentDidMount',
-            'componentWillReceiveProps',
-            'UNSAFE_componentWillReceiveProps',
-            'shouldComponentUpdate',
-            'componentWillUpdate',
-            'UNSAFE_componentWillUpdate',
-            'getSnapshotBeforeUpdate',
-            'componentDidUpdate',
-            'componentDidCatch',
-            'componentWillUnmount',
-          ],
-        },
-      },
-    ],
-
-    // permit both styles of state declaration
-    'react/state-in-constructor': 0,
-
-    // require statics to be declared as public fields
-    'react/static-property-placement': [2, 'static public field'],
-  },
-  settings: {
-    // do not attempt to parse npm modules or non-JS files for exports
-    'import/ignore': ['node_modules', '.(png|svg|jpg|css|pdf)$'],
-    'import/extensions': ['.js'],
-    react: {version: '16.8.1'},
+    '@typescript-eslint/no-explicit-any': 2,
+
+    // these are checked by the TS compiler
+    '@typescript-eslint/no-unused-vars': 0,
+    'import/default': 0,
+    'import/named': 0,
+    'import/namespace': 0,
+    'react/forbid-prop-types': 0,
+    'react/jsx-no-undef': 0,
+    'react/no-unused-prop-types': 0,
+    'react/prop-types': 0,
+    'react/react-in-jsx-scope': 0,
   },
-  overrides: [
-    {
-      files: ['*.ts', '*.tsx'],
-      extends: [
-        'plugin:@typescript-eslint/eslint-recommended',
-        'plugin:@typescript-eslint/recommended',
-        'plugin:import/typescript',
-        'prettier/@typescript-eslint',
-      ],
-      rules: {
-        // upgrade severity from warning to error
-        '@typescript-eslint/explicit-function-return-type': [
-          2,
-          {allowExpressions: true, allowTypedFunctionExpressions: true},
-        ],
-        '@typescript-eslint/no-explicit-any': 2,
-
-        // these are checked by the TS compiler
-        '@typescript-eslint/no-unused-vars': 0,
-        'import/default': 0,
-        'import/named': 0,
-        'import/namespace': 0,
-        'react/forbid-prop-types': 0,
-        'react/jsx-no-undef': 0,
-        'react/no-unused-prop-types': 0,
-        'react/prop-types': 0,
-        'react/react-in-jsx-scope': 0,
-      },
-    },
-  ],
 }
diff --git a/javascript.js b/javascript.js
new file mode 100644
index 0000000..4d2be21
--- /dev/null
+++ b/javascript.js
@@ -0,0 +1,103 @@
+module.exports = {
+  extends: ['airbnb', 'airbnb/hooks', 'prettier', 'prettier/react'],
+  plugins: ['prettier'],
+  parser: 'babel-eslint',
+  env: {
+    // allow browser globals
+    browser: true,
+  },
+  rules: {
+    // https://github.com/prettier/eslint-config-prettier#arrow-body-style-and-prefer-arrow-callback
+    'arrow-body-style': [2, 'as-needed', {requireReturnForObjectLiteral: false}],
+
+    // ensure that default, named, and namespaced imports have been exported by the target file
+    'import/default': 2,
+    'import/namespace': [2, {allowComputed: true}],
+
+    // require import groups to be ordered by specificity and separated by linebreaks
+    'import/order': [2, {'newlines-between': 'always'}],
+
+    // allow non-ID-linked <label>s to accomodate those containing linked <input>s
+    'jsx-a11y/label-has-for': 0,
+    'jsx-a11y/label-has-associated-control': [2, {assert: 'either'}],
+
+    // allow event listeners on static elements (e.g. onClick on divs)
+    'jsx-a11y/no-static-element-interactions': 0,
+
+    // https://github.com/prettier/eslint-config-prettier#arrow-body-style-and-prefer-arrow-callback
+    'prefer-arrow-callback': [2, {allowNamedFunctions: false, allowUnboundThis: true}],
+
+    'prettier/prettier': [
+      2,
+      {
+        printWidth: 100,
+        semi: false,
+        singleQuote: true,
+        trailingComma: 'es5',
+        bracketSpacing: false,
+      },
+    ],
+
+    // disallow .jsx files for consistency
+    'react/jsx-filename-extension': 0,
+
+    // allow function creation in render
+    'react/jsx-no-bind': 0,
+
+    // do not require default props for optional props
+    'react/require-default-props': 0,
+
+    'react/sort-comp': [
+      2,
+      {
+        order: [
+          'lifecycle-statics',
+          'static-methods',
+          'constructor',
+          'instance-variables',
+          'lifecycle-methods',
+          'everything-else',
+          'render',
+        ],
+        groups: {
+          'lifecycle-statics': [
+            'displayName',
+            'propTypes',
+            'contextTypes',
+            'childContextTypes',
+            'defaultProps',
+          ],
+          'lifecycle-methods': [
+            'state',
+            'getChildContext',
+            'getDerivedStateFromProps',
+            'componentWillMount',
+            'UNSAFE_componentWillMount',
+            'componentDidMount',
+            'componentWillReceiveProps',
+            'UNSAFE_componentWillReceiveProps',
+            'shouldComponentUpdate',
+            'componentWillUpdate',
+            'UNSAFE_componentWillUpdate',
+            'getSnapshotBeforeUpdate',
+            'componentDidUpdate',
+            'componentDidCatch',
+            'componentWillUnmount',
+          ],
+        },
+      },
+    ],
+
+    // permit both styles of state declaration
+    'react/state-in-constructor': 0,
+
+    // require statics to be declared as public fields
+    'react/static-property-placement': [2, 'static public field'],
+  },
+  settings: {
+    // do not attempt to parse npm modules or non-JS files for exports
+    'import/ignore': ['node_modules', '.(png|svg|jpg|css|pdf)$'],
+    'import/extensions': ['.js'],
+    react: {version: '16.8.1'},
+  },
+}
diff --git a/package.json b/package.json
index bb332b2..1086b67 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,8 @@
     "prepublishOnly": "npm test"
   },
   "files": [
-    "index.js"
+    "index.js",
+    "javascript.js"
   ],
   "dependencies": {
     "@typescript-eslint/eslint-plugin": "^2.0.0",
diff --git a/test.js b/test.js
index 0796d11..2f8d24b 100644
--- a/test.js
+++ b/test.js
@@ -3,16 +3,18 @@ const path = require('path')
 
 const {CLIEngine} = require('eslint')
 
+const jsConfig = require('./javascript')
+
 const config = require('.')
 
-test('lints all fixtures', async () => {
+async function lintFixtures(baseConfig, fixturesDir) {
   const cli = new CLIEngine({
-    baseConfig: config,
+    baseConfig,
     extensions: ['.js', '.ts', '.tsx'],
     ignore: false,
     useEslintrc: false,
   })
-  const {results} = await cli.executeOnFiles([`${__dirname}/fixtures`])
+  const {results} = await cli.executeOnFiles([fixturesDir])
   results.forEach(result => {
     const basename = path.basename(result.filePath)
     const messages = result.messages.map(message => ({
@@ -24,4 +26,11 @@ test('lints all fixtures', async () => {
     }))
     expect(messages).toMatchSnapshot(basename)
   })
+}
+
+test.each([
+  ['TS', config, `${__dirname}/fixtures/ts`],
+  ['JS', jsConfig, `${__dirname}/fixtures/js`],
+])('lints all %s fixtures', (name, lintConfig, dir) => {
+  lintFixtures(lintConfig, dir)
 })