diff --git a/lib/cmd/cov.js b/lib/cmd/cov.js
index 62f0d8e6..7efb80e2 100644
--- a/lib/cmd/cov.js
+++ b/lib/cmd/cov.js
@@ -77,6 +77,7 @@ class CovCommand extends Command {
       env: Object.assign({ NODE_ENV: 'test' }, env),
     };
 
+    // FIXME: remove hotfix after https://github.com/tapjs/spawn-wrap/pull/57 merged
     yield hotfixSpawnWrap();
 
     // save coverage-xxxx.json to $PWD/coverage
@@ -127,14 +128,17 @@ const src = 'var command = path.basename(options.file, \'.exe\')';
 const target = 'var command = path.basename(options.file).replace(/\.exe$/i, \'\')';
 
 function* hotfixSpawnWrap() {
-  yield replaceSpawnWrap(src, target);
+  if (process.platform === 'win32') {
+    yield replaceSpawnWrap(src, target);
+  }
 }
 
 function* rollbackSpawnWrap() {
-  yield replaceSpawnWrap(target, src);
+  if (process.platform === 'win32') {
+    yield replaceSpawnWrap(target, src);
+  }
 }
 
-
 function* replaceSpawnWrap(src, target) {
   let spawnWrapPath;
   try {
diff --git a/test/lib/cmd/cov.test.js b/test/lib/cmd/cov.test.js
index e7ce0d39..9c727dcb 100644
--- a/test/lib/cmd/cov.test.js
+++ b/test/lib/cmd/cov.test.js
@@ -27,8 +27,38 @@ describe('test/lib/cmd/cov.test.js', () => {
       child.expect('stdout', /Statements {3}: 80% \( 4[\/|\\]5 \)/);
     }
 
+    if (process.platform === 'win32') {
+      child.expect('stderr', /\[egg-bin] hotfix spawn-wrap/);
+    }
+
+    child.expect('code', 0)
+      .end(err => {
+        assert.ifError(err);
+        assert.ok(fs.existsSync(path.join(cwd, 'coverage/coverage-final.json')));
+        assert.ok(fs.existsSync(path.join(cwd, 'coverage/coverage-summary.json')));
+        assert.ok(fs.existsSync(path.join(cwd, 'coverage/lcov-report/index.html')));
+        assert.ok(fs.existsSync(path.join(cwd, 'coverage/lcov.info')));
+        done();
+      });
+  });
+
+  it('should hotfixSpawnWrap success on mock windows', done => {
+    mm(process.env, 'TESTS', 'test/**/*.test.js');
+    mm(process.env, 'NYC_CWD', cwd);
+    const child = coffee.fork(eggBin, [ 'cov' ], { cwd })
+      .debug()
+      .beforeScript(path.join(__dirname, 'mock-win32.js'))
+      .expect('stdout', /should success/)
+      .expect('stdout', /a\.test\.js/)
+      .expect('stdout', /b[\/|\\]b\.test\.js/)
+      .notExpect('stdout', /a.js/);
+
+    // only test on npm run test
+    if (!process.env.NYC_ROOT_ID) {
+      child.expect('stdout', /Statements {3}: 80% \( 4[\/|\\]5 \)/);
+    }
+    child.expect('stderr', /\[egg-bin] hotfix spawn-wrap/);
     child.expect('code', 0)
-      .expect('stderr', /\[egg-bin] hotfix spawn-wrap/)
       .end(err => {
         assert.ifError(err);
         assert.ok(fs.existsSync(path.join(cwd, 'coverage/coverage-final.json')));
diff --git a/test/lib/cmd/mock-win32.js b/test/lib/cmd/mock-win32.js
new file mode 100644
index 00000000..da9538a1
--- /dev/null
+++ b/test/lib/cmd/mock-win32.js
@@ -0,0 +1,4 @@
+'use strict';
+
+const mm = require('mm');
+mm(process, 'platform', 'win32');