diff --git a/src/config.ts b/src/config.ts
index 6d6f957f..8a3d3777 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -349,7 +349,11 @@ export class Config implements IConfig {
 
   async runCommand(id: string, argv: string[] = []) {
     debug('runCommand %s %o', id, argv)
-    const c = this.findCommand(id)
+    let c = this.findCommand(id)
+    if (!c) {
+      c = this.findCommand('default')
+      argv.unshift(id)
+    }
     if (!c) {
       await this.runHook('command_not_found', {id})
       throw new CLIError(`command ${id} not found`)
diff --git a/test/fixtures/typescript/src/commands/foo/bar/default-result.ts b/test/fixtures/typescript/src/commands/foo/bar/default-result.ts
new file mode 100644
index 00000000..3157bd34
--- /dev/null
+++ b/test/fixtures/typescript/src/commands/foo/bar/default-result.ts
@@ -0,0 +1,7 @@
+export class Command {
+  static run() {
+    console.log('it works!')
+  }
+
+  static aliases = ['default']
+}
diff --git a/test/fixtures/typescript/src/hooks/postrun.ts b/test/fixtures/typescript/src/hooks/postrun.ts
index be765f28..b756329f 100644
--- a/test/fixtures/typescript/src/hooks/postrun.ts
+++ b/test/fixtures/typescript/src/hooks/postrun.ts
@@ -2,5 +2,7 @@ export default function postrun(options: any) {
   console.log('running ts postrun hook')
   if (options.Command.id === 'foo:bar:test-result') {
     console.log(options.result)
+  } else if (options.Command.id === 'foo:bar:default-result') {
+    console.log(options.argv)
   }
 }
diff --git a/test/typescript.test.ts b/test/typescript.test.ts
index 42883e7a..4b17dec1 100644
--- a/test/typescript.test.ts
+++ b/test/typescript.test.ts
@@ -50,4 +50,11 @@ describe('typescript', () => {
     await (ctx.config.runHook as any)('init', {id: 'myid', argv: ['foo']})
     expect(ctx.stdout).to.equal('running ts init hook\n')
   })
+
+  withConfig
+  .stdout()
+  .it('runs ts default command if command not found', async ctx => {
+    await ctx.config.runCommand('no-such-command')
+    expect(ctx.stdout).to.equal('running ts prerun hook\nit works!\nrunning ts postrun hook\n[ \'no-such-command\' ]\n')
+  })
 })