diff --git a/lib/cmd/test.js b/lib/cmd/test.js
index 7045b289..88a25df0 100644
--- a/lib/cmd/test.js
+++ b/lib/cmd/test.js
@@ -50,6 +50,19 @@ class TestCommand extends Command {
     yield this.helper.forkNode(mochaFile, testArgs, opt);
   }
 
+  get context() {
+    const context = super.context;
+    const { argv, execArgvObj } = context;
+
+    // remove ts-node, ts-node and espower-typescript can't coexist
+    // because espower-typescript@9 has already register ts-node
+    if (argv.typescript) {
+      execArgvObj.require.splice(execArgvObj.require.indexOf(require.resolve('ts-node/register')), 1);
+    }
+
+    return context;
+  }
+
   /**
    * format test args then change it to array style
    * @param {Object} context - { cwd, argv, ...}
@@ -90,6 +103,7 @@ class TestCommand extends Command {
 
     // for power-assert
     if (testArgv.typescript) {
+      // remove ts-node in context getter on top.
       requireArr.push(require.resolve('espower-typescript/guess'));
     }
 
diff --git a/lib/command.js b/lib/command.js
index 9bcb1e4b..0b750ee0 100644
--- a/lib/command.js
+++ b/lib/command.js
@@ -50,8 +50,16 @@ class Command extends BaseCommand {
     // execArgv
     if (argv.typescript) {
       execArgvObj.require = execArgvObj.require || [];
-      execArgvObj.require.push(path.join(__dirname, './ts-helper.js'));
-      env.EGG_TYPESCRIPT = true;
+      execArgvObj.require.push(require.resolve('ts-node/register'));
+
+      // tell egg loader to load ts file
+      env.EGG_TYPESCRIPT = 'true';
+
+      // use type check
+      env.TS_NODE_TYPE_CHECK = process.env.TS_NODE_TYPE_CHECK || 'true';
+
+      // load files from tsconfig on startup
+      env.TS_NODE_FILES = process.env.TS_NODE_FILES || 'true';
     }
 
     return context;
diff --git a/lib/ts-helper.js b/lib/ts-helper.js
deleted file mode 100644
index cb435ad3..00000000
--- a/lib/ts-helper.js
+++ /dev/null
@@ -1,6 +0,0 @@
-'use strict';
-
-require('ts-node').register({
-  typeCheck: true,
-  files: true,
-});
diff --git a/package.json b/package.json
index 66e873c8..11434457 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "debug": "^3.1.0",
     "detect-port": "^1.2.3",
     "egg-utils": "^2.4.0",
-    "espower-typescript": "^8.0.0",
+    "espower-typescript": "^9.0.0",
     "globby": "^8.0.1",
     "inspector-proxy": "^1.2.1",
     "intelli-espower-loader": "^1.0.1",