diff --git a/packages/plugin-declare/README.md b/packages/plugin-declare/README.md
index f7e7cedb13..d83c2e93c7 100644
--- a/packages/plugin-declare/README.md
+++ b/packages/plugin-declare/README.md
@@ -5,7 +5,6 @@
 
 🐊[**Putout**](https://github.com/coderaiser/putout) plugin adds ability to declare variable that was not defined before, including:
 
-- is types: `isFn`, `isString`, `isNumber`, `isObject`, `isBool`, `isUndefined`, `isSymbol` and `isNull`;
 - [maybe](https://github.com/coderaiser/putout/tree/master/packages/plugin-maybe#readme): `maybeArray`, `maybeFn`, `maybeEmptyArray`;
 - wrap: `not`,`id`, `returns`;
 - fresh-import: `freshImport`, `freshImportDefault`;
@@ -57,7 +56,6 @@ Use options:
                 "parse",
                 "stringify",
                 "defineProperty",
-                "isArray",
                 "noop",
                 "join",
                 "keys",
@@ -136,21 +134,6 @@ const object = {};
 const allValues = values(object);
 ```
 
-## `isArray`
-
-### ❌ Example of incorrect code
-
-```js
-isArray(array);
-```
-
-### ✅ Example of correct code
-
-```js
-const {isArray} = Array;
-isArray(array);
-```
-
 ## `noop`
 
 ### ❌ Example of incorrect code
diff --git a/packages/plugin-declare/lib/index.js b/packages/plugin-declare/lib/index.js
index c2c029630d..7db675e69a 100644
--- a/packages/plugin-declare/lib/index.js
+++ b/packages/plugin-declare/lib/index.js
@@ -10,8 +10,6 @@ module.exports.declare = () => ({
     ...wrap,
     ...freshImport,
     ...fixtures,
-    isArray: 'const {isArray} = Array',
-    
     parse: 'const {parse} = JSON',
     stringify: 'const {stringify} = JSON',
     
diff --git a/packages/plugin-declare/test/declare.js b/packages/plugin-declare/test/declare.js
index b85d67f744..3d288e0ca9 100644
--- a/packages/plugin-declare/test/declare.js
+++ b/packages/plugin-declare/test/declare.js
@@ -22,11 +22,6 @@ test('putout: plugin: declare: transform: assign', (t) => {
     t.end();
 });
 
-test('putout: plugin: declare: transform: is-array', (t) => {
-    t.transform('is-array');
-    t.end();
-});
-
 test('putout: plugin: declare: transform: keys', (t) => {
     t.transform('keys');
     t.end();
diff --git a/packages/plugin-declare/test/fixture/is-array-fix.js b/packages/plugin-declare/test/fixture/is-array-fix.js
deleted file mode 100644
index 4a2f1f2fc2..0000000000
--- a/packages/plugin-declare/test/fixture/is-array-fix.js
+++ /dev/null
@@ -1,2 +0,0 @@
-const {isArray} = Array;
-isArray(array);
diff --git a/packages/plugin-declare/test/fixture/is-array.js b/packages/plugin-declare/test/fixture/is-array.js
deleted file mode 100644
index f68e77ea8b..0000000000
--- a/packages/plugin-declare/test/fixture/is-array.js
+++ /dev/null
@@ -1 +0,0 @@
-isArray(array);