diff --git a/src/utils.ts b/src/utils.ts
index 2d5f78e..9a8fd7b 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,6 +1,14 @@
 import { isArray } from 'rattail';
 import type { Alias } from './types';
 
+/**
+ * Check all values in array are same to target
+ * @returns {boolean}
+ */
+export function allNotEqualToTarget<T>(values: T[], target: T) {
+  return values.every((value) => value !== target);
+}
+
 /**
  * Check alias name or command is valid
  *
@@ -18,10 +26,9 @@ import type { Alias } from './types';
  * ```
  *
  * @param {value} string
- * @param {boolean} [skipNoQuote=false] - whether to skip no quote validation
  * @returns If it is valid, return true
  */
-function isValid(value: string, skipNoQuote = false) {
+export function isValid(value: string) {
   const firstChar = value.charAt(0);
   const lastChar = value.charAt(value.length - 1);
 
@@ -33,7 +40,7 @@ function isValid(value: string, skipNoQuote = false) {
     return true;
   }
 
-  if (![`'`, `"`].includes(firstChar) && ![`'`, `"`].includes(lastChar) && !skipNoQuote) {
+  if (![`'`, `"`].includes(firstChar) && ![`'`, `"`].includes(lastChar)) {
     return true;
   }
 
@@ -77,6 +84,16 @@ function isValid(value: string, skipNoQuote = false) {
  * resolveAlias(`alias "nv"="node -v"`) // { aliasName: 'nv', command: 'node -v' }
  * ```
  *
+ * @example
+ * ```typescript
+ * resolveAlias(`alias nv=node -v`) // { aliasName: 'nv', command: 'node' }
+ * ```
+ *
+ * @example
+ * ```typescript
+ * resolveAlias(`alias nv=node`) // { aliasName: 'nv', command: 'node' }
+ * ```
+ *
  * @param {value} string
  * @returns If it is not valid, return undefined
  */
@@ -108,7 +125,18 @@ export function resolveAlias(value: string): Pick<Alias, 'aliasName' | 'command'
     return;
   }
 
-  if (isValid(aliasName) && isValid(command, true)) {
+  const firstCommandChar = command.charAt(0);
+  const lastCommandChar = command.charAt(command.length - 1);
+
+  // clear command if command isn't wrapper by quote, e.g. node -v -> node
+  if (
+    allNotEqualToTarget([firstCommandChar, lastCommandChar], `'`) &&
+    allNotEqualToTarget([firstCommandChar, lastCommandChar], `"`)
+  ) {
+    command = command.split(' ')[0];
+  }
+
+  if (isValid(aliasName) && isValid(command)) {
     return {
       aliasName: aliasName.replace(/^['"](.*)['"]$/, '$1'),
       command: command.replace(/^['"](.*)['"]$/, '$1'),
@@ -129,7 +157,7 @@ export function isSameAlias(targetAlias: Alias, sourceAlias: Alias) {
 }
 
 /**
- * covert value to array
+ * Covert value to array
  * @param {Array | undefined} value
  * @returns {boolean}
  */
@@ -138,7 +166,7 @@ export function normalizeAliasesToArray<T>(value: T[] | undefined) {
 }
 
 /**
- * generate unalias command
+ * Generate unalias command
  * @param {Alias[]} aliases
  * @returns {string}
  */
diff --git a/tests/utils.spec.ts b/tests/utils.spec.ts
index 90249ac..be441a8 100644
--- a/tests/utils.spec.ts
+++ b/tests/utils.spec.ts
@@ -1,6 +1,13 @@
 import { describe, expect, it } from 'vitest';
 import type { Alias } from '../src/types';
-import { formatUnaliasCommand, isSameAlias, normalizeAliasesToArray, resolveAlias } from '../src/utils';
+import {
+  allNotEqualToTarget,
+  formatUnaliasCommand,
+  isSameAlias,
+  isValid,
+  normalizeAliasesToArray,
+  resolveAlias,
+} from '../src/utils';
 
 const alias = {
   aliasName: 'nv',
@@ -43,11 +50,6 @@ describe('test alias resolve', () => {
     expect(resolveAlias(value)).toStrictEqual(alias);
   });
 
-  it('alias command without quote', () => {
-    const value = `alias "nv"=node -v`;
-    expect(resolveAlias(value)).toStrictEqual(undefined);
-  });
-
   it('space before =', () => {
     const value = `alias nv ='node -v'`;
     expect(resolveAlias(value)).toStrictEqual(undefined);
@@ -57,6 +59,22 @@ describe('test alias resolve', () => {
     const value = `alias nv= 'node -v'`;
     expect(resolveAlias(value)).toStrictEqual(undefined);
   });
+
+  it('alias name without quote and command has space without quote', () => {
+    const value = 'alias nv=node -v';
+    expect(resolveAlias(value)).toStrictEqual({
+      aliasName: alias.aliasName,
+      command: 'node',
+    });
+  });
+
+  it('alias name without quote and command without space and quote', () => {
+    const value = 'alias nv=node';
+    expect(resolveAlias(value)).toStrictEqual({
+      aliasName: alias.aliasName,
+      command: 'node',
+    });
+  });
 });
 
 describe('test same alias', () => {
@@ -108,3 +126,27 @@ describe('test format unalias command', () => {
     expect(formatUnaliasCommand([alias, alias])).toBe('unalias nv nv');
   });
 });
+
+describe('test alias name and command are valid', () => {
+  it('param without quote', () => {
+    expect(isValid('test')).toBe(true);
+  });
+
+  it('param without quote', () => {
+    expect(isValid(`'test'`)).toBe(true);
+  });
+
+  it('param without quote', () => {
+    expect(isValid(`"test"`)).toBe(true);
+  });
+});
+
+describe('test all values are not equal to target', () => {
+  it('param are same to target', () => {
+    expect(allNotEqualToTarget(['1', '1'], '2')).toBe(true);
+  });
+
+  it('param are not same to target', () => {
+    expect(allNotEqualToTarget(['2', '1'], '2')).toBe(false);
+  });
+});