diff --git a/README.md b/README.md
index 0b414965..eb97d158 100644
--- a/README.md
+++ b/README.md
@@ -132,7 +132,7 @@ You can pass any mocha argv.
 - `--typescript` / `--ts` enable typescript support, default to `false`.
 - `--changed` / `-c` only test changed test files(test files means files that match `${pwd}/test/**/*.test.(js|ts)`)
 - `--dry-run` / `-d` whether dry-run the test command, just show the command
-- `--espower` / `-e` whether auto require intelli-espower-loader(js) or espower-typescript(ts) for power-assert, default to `true`.
+- `--espower` / `-e` whether auto require intelli-espower-loader(js) or espower-typescript(ts) for power-assert, default to `false`.
 - `--parallel` enable mocha parallel mode, default to `false`.
 - `--auto-agent` auto start agent in mocha master agent.
 - `--jobs` number of jobs to run in parallel, default to `os.cpus().length - 1`.
diff --git a/lib/cmd/test.js b/lib/cmd/test.js
index 1c5808cc..73f63668 100644
--- a/lib/cmd/test.js
+++ b/lib/cmd/test.js
@@ -42,7 +42,7 @@ class TestCommand extends Command {
       espower: {
         type: 'boolean',
         description: 'whether require intelli-espower-loader(js) or espower-typescript(ts) for power-assert',
-        default: true,
+        default: false,
         alias: 'e',
       },
       parallel: {
diff --git a/package.json b/package.json
index 7a0a4437..68fae633 100644
--- a/package.json
+++ b/package.json
@@ -48,6 +48,7 @@
     }
   },
   "devDependencies": {
+    "@eggjs/tsconfig": "^1.2.0",
     "@types/mocha": "^9.1.1",
     "babel": "^6.3.26",
     "babel-preset-airbnb": "^1.0.1",
@@ -84,6 +85,7 @@
     "pkgfiles": "node bin/egg-bin.js pkgfiles",
     "test": "npm run lint -- --fix && npm run test-local",
     "test-local": "node bin/egg-bin.js test -t 120000 --parallel",
+    "test-single": "node bin/egg-bin.js test -t 120000",
     "test-mochawesome": "npm run test-local -- --mochawesome",
     "cov": "c8 -r lcov -r text-summary npm run test-local",
     "ci-test-only": "npm run test-local -- test/lib/cmd/cov.test.js",
diff --git a/test/fixtures/example-ts-pkg/tsconfig.json b/test/fixtures/example-ts-pkg/tsconfig.json
index 4f10abf7..376b9024 100644
--- a/test/fixtures/example-ts-pkg/tsconfig.json
+++ b/test/fixtures/example-ts-pkg/tsconfig.json
@@ -1,19 +1,3 @@
 {
-  "compilerOptions": {
-    "target": "es2017",
-    "module": "commonjs",
-    "strict": true,
-    "noImplicitAny": false,
-    "moduleResolution": "node",
-    "experimentalDecorators": true,
-    "emitDecoratorMetadata": true,
-    "pretty": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "noFallthroughCasesInSwitch": true,
-    "skipLibCheck": true,
-    "skipDefaultLibCheck": true,
-    "inlineSourceMap": true,
-    "importHelpers": true
-  },
-}
\ No newline at end of file
+  "extends": "@eggjs/tsconfig"
+}
diff --git a/test/fixtures/ts/test/sub.ts b/test/fixtures/ts/test/sub.ts
index 61519692..f188cdfa 100644
--- a/test/fixtures/ts/test/sub.ts
+++ b/test/fixtures/ts/test/sub.ts
@@ -1,3 +1,9 @@
-'use strict';
-
 export default { name: 'egg from ts' };
+
+function foo(bar?: string) {
+  return bar ?? '';
+}
+
+if (process.env.NOT_EXISTS) {
+  console.log(foo());
+}
diff --git a/test/fixtures/ts/tsconfig.json b/test/fixtures/ts/tsconfig.json
index 4f10abf7..376b9024 100644
--- a/test/fixtures/ts/tsconfig.json
+++ b/test/fixtures/ts/tsconfig.json
@@ -1,19 +1,3 @@
 {
-  "compilerOptions": {
-    "target": "es2017",
-    "module": "commonjs",
-    "strict": true,
-    "noImplicitAny": false,
-    "moduleResolution": "node",
-    "experimentalDecorators": true,
-    "emitDecoratorMetadata": true,
-    "pretty": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "noFallthroughCasesInSwitch": true,
-    "skipLibCheck": true,
-    "skipDefaultLibCheck": true,
-    "inlineSourceMap": true,
-    "importHelpers": true
-  },
-}
\ No newline at end of file
+  "extends": "@eggjs/tsconfig"
+}
diff --git a/test/lib/cmd/cov-c8-report.test.js b/test/lib/cmd/cov-c8-report.test.js
index 5d0562d4..da6ac65a 100644
--- a/test/lib/cmd/cov-c8-report.test.js
+++ b/test/lib/cmd/cov-c8-report.test.js
@@ -116,7 +116,7 @@ describe('test/lib/cmd/cov-c8-report.test.js', () => {
 
   it('should fail when test fail with power-assert', () => {
     mm(process.env, 'TESTS', 'test/power-assert-fail.js');
-    return coffee.fork(eggBin, [ 'cov', '--c8-report=true' ], { cwd })
+    return coffee.fork(eggBin, [ 'cov', '--c8-report=true', '--espower=true' ], { cwd })
       // .debug()
       .expect('stdout', /1\) should fail/)
       .expect('stdout', /1 failing/)
diff --git a/test/lib/cmd/cov.test.js b/test/lib/cmd/cov.test.js
index 682e9c98..de9e5ac5 100644
--- a/test/lib/cmd/cov.test.js
+++ b/test/lib/cmd/cov.test.js
@@ -145,7 +145,7 @@ describe('test/lib/cmd/cov.test.js', () => {
 
   it('should fail when test fail with power-assert', () => {
     mm(process.env, 'TESTS', 'test/power-assert-fail.js');
-    return coffee.fork(eggBin, [ 'cov' ], { cwd })
+    return coffee.fork(eggBin, [ 'cov', '--espower=true' ], { cwd })
       // .debug()
       .expect('stdout', /1\) should fail/)
       .expect('stdout', /1 failing/)
diff --git a/test/lib/cmd/test.test.js b/test/lib/cmd/test.test.js
index 155cfc5e..14580086 100644
--- a/test/lib/cmd/test.test.js
+++ b/test/lib/cmd/test.test.js
@@ -109,7 +109,7 @@ describe('test/lib/cmd/test.test.js', () => {
 
   it('should fail when test fail with power-assert', done => {
     mm(process.env, 'TESTS', 'test/power-assert-fail.js');
-    coffee.fork(eggBin, [ 'test' ], { cwd })
+    coffee.fork(eggBin, [ 'test', '--espower=true' ], { cwd })
     // .coverage(false)
     // .debug()
       .expect('stdout', /1\) should fail/)
@@ -119,58 +119,6 @@ describe('test/lib/cmd/test.test.js', () => {
       .end(done);
   });
 
-  describe('intelli-espower-loader', () => {
-    it('should warn when require intelli-espower-loader', () => {
-      mm(process.env, 'TESTS', 'test/power-assert-fail.js');
-      return coffee.fork(eggBin, [ 'test', '-r', 'intelli-espower-loader' ], { cwd })
-      // .coverage(false)
-      // .debug()
-        .expect('stderr', /manually require `intelli-espower-loader`/)
-        .expect('stdout', /1\) should fail/)
-        .expect('stdout', /assert\(1 === 2\)/)
-        .expect('stdout', /1 failing/)
-        .expect('code', 1)
-        .end();
-    });
-
-    it('should default require intelli-espower-loader', () => {
-      mm(process.env, 'TESTS', 'test/power-assert-fail.js');
-      return coffee.fork(eggBin, [ 'test', '--dry-run' ], { cwd })
-      // .coverage(false)
-      // .debug()
-        .expect('stdout', /--require=.*intelli-espower-loader\.js/)
-        .end();
-    });
-
-    it('should not require intelli-espower-loader with --espower=false', () => {
-      mm(process.env, 'TESTS', 'test/power-assert-fail.js');
-      return coffee.fork(eggBin, [ 'test', '--espower=false', '--dry-run' ], { cwd })
-      // .coverage(false)
-      // .debug()
-        .notExpect('stdout', /--require=.*intelli-espower-loader\.js/)
-        .end();
-    });
-
-    it('should default require espower-typescript when typescript', () => {
-      mm(process.env, 'TESTS', 'test/power-assert-fail.js');
-      return coffee.fork(eggBin, [ 'test', '--typescript', '--dry-run' ], { cwd })
-      // .coverage(false)
-      // .debug()
-        .expect('stdout', /--require=.*espower-typescript\.js/)
-        .end();
-    });
-
-    it('should not require ntelli-espower-loader/espower-typescript when typescript with --espower=false', () => {
-      mm(process.env, 'TESTS', 'test/power-assert-fail.js');
-      return coffee.fork(eggBin, [ 'test', '--typescript', '--espower=false', '--dry-run' ], { cwd })
-      // .coverage(false)
-      // .debug()
-        .notExpect('stdout', /--require=.*intelli-espower-loader\.js/)
-        .notExpect('stdout', /--require=.*espower-typescript\.js/)
-        .end();
-    });
-  });
-
   it('should auto require test/.setup.js', () => {
     // example: https://github.com/lelandrichardson/enzyme-example-mocha
     mm(process.env, 'TESTS', 'test/Foo.test.js');
@@ -209,7 +157,6 @@ describe('test/lib/cmd/test.test.js', () => {
         /--timeout=12345/,
         /--exit/,
         /--require=.*mocha-clean\.js/,
-        /--require=.*intelli-espower-loader\.js/,
         /foo\.test\.js/,
       ])
       .notExpect('stdout', /--dry-run/)
diff --git a/test/ts.test.js b/test/ts.test.js
index 4ce688d5..884994b3 100644
--- a/test/ts.test.js
+++ b/test/ts.test.js
@@ -31,9 +31,7 @@ describe('test/ts.test.js', () => {
     mm(process.env, 'NODE_ENV', 'development');
     return coffee.fork(eggBin, [ 'test', '--typescript' ], { cwd })
       // .debug()
-      .notExpect('stdout', /false == true/)
-      .notExpect('stdout', /should not load js files/)
-      .expect('stdout', /--- \[string\] 'wrong assert ts'/)
+      .expect('stdout', /The expression evaluated to a falsy value/)
       .expect('code', 1)
       .end();
   });
@@ -69,8 +67,8 @@ describe('test/ts.test.js', () => {
     });
 
     it('should cov app', () => {
-      return coffee.fork(eggBin, [ 'cov', '--ts' ], { cwd })
-        // .debug()
+      return coffee.fork(eggBin, [ 'cov', '--ts', '--espower=true' ], { cwd })
+        .debug()
         .expect('stdout', /hi, egg, 123456/)
         .expect('stdout', /ts env: true/)
         .expect('stdout', os.platform() === 'win32' ? /Coverage summary/ : /Statements.*100%/)
@@ -78,7 +76,7 @@ describe('test/ts.test.js', () => {
         .end();
     });
 
-    it('should cov app in cluster mod', () => {
+    it.skip('should cov app in cluster mod', () => {
       // skip on darwin
       // https://github.com/eggjs/egg-bin/runs/6735190362?check_suite_focus=true
       // [agent_worker] receive disconnect event on child_process fork mode, exiting with code:110
@@ -123,7 +121,6 @@ describe('test/ts.test.js', () => {
         .expect('stdout', /| {3}| {3}|/)
         .expect('stdout', /| {3}| {3}false/)
         .expect('stdout', /| {3}"111"/)
-        .expect('stdout', /Object\{key:"111"}/)
         .end();
     });
 
@@ -131,15 +128,13 @@ describe('test/ts.test.js', () => {
       if (process.platform === 'win32') return;
 
       return coffee.fork(eggBin, [ 'test', '--tscompiler=esbuild-register' ], { cwd })
-        // .debug()
+        .debug()
         .expect('stdout', /error/)
         .expect('stdout', /test[\/\\]{1}index\.test\.ts:8:11\)/)
         .expect('stdout', /test[\/\\]{1}index\.test\.ts:14:5\)/)
-        .expect('stdout', /assert\(obj\.key === "222"\)/)
         .expect('stdout', /| {3}| {3}|/)
         .expect('stdout', /| {3}| {3}false/)
         .expect('stdout', /| {3}"111"/)
-        .expect('stdout', /Object\{key:"111"}/)
         .end();
     });
 
@@ -155,7 +150,6 @@ describe('test/ts.test.js', () => {
         .expect('stdout', /| {3}| {3}|/)
         .expect('stdout', /| {3}| {3}false/)
         .expect('stdout', /| {3}"111"/)
-        .expect('stdout', /Object\{key:"111"}/)
         .end();
     });
 
@@ -173,7 +167,6 @@ describe('test/ts.test.js', () => {
         .expect('stdout', /| {3}| {3}|/)
         .expect('stdout', /| {3}| {3}false/)
         .expect('stdout', /| {3}"111"/)
-        .expect('stdout', /Object\{key:"111"}/)
         .end();
     });
   });
@@ -320,7 +313,7 @@ describe('test/ts.test.js', () => {
 
     it('should test app', () => {
       return coffee.fork(eggBin, [ 'test' ], { cwd })
-        // .debug()
+        .debug()
         .expect('stdout', /hi, egg, 123456/)
         .expect('stdout', /ts env: true/)
         .expect('code', 0)
@@ -349,8 +342,8 @@ describe('test/ts.test.js', () => {
     });
 
     it('should cov app', () => {
-      return coffee.fork(eggBin, [ 'cov' ], { cwd })
-        // .debug()
+      return coffee.fork(eggBin, [ 'cov', '--espower=true' ], { cwd })
+        .debug()
         .expect('stdout', /hi, egg, 123456/)
         .expect('stdout', /ts env: true/)
         .expect('stdout', process.env.NYC_ROOT_ID ? /Coverage summary/ : /Statements.*100%/)