diff --git a/test/add-subtest-async.js b/test/add-subtest-async.js
index ddc39f76..51a9d0b6 100644
--- a/test/add-subtest-async.js
+++ b/test/add-subtest-async.js
@@ -3,9 +3,9 @@ var test = require('../')
 test('parent', function (t) {
     t.pass('parent');
     setTimeout(function () {
-        t.test('child', function (t) {
-            t.pass('child');
-            t.end();
+        t.test('child', function (st) {
+            st.pass('child');
+            st.end();
         });
-    }, 100)
+    }, 100);
 })
diff --git a/test/subtest_and_async.js b/test/subtest_and_async.js
index 9e49965d..3703a979 100644
--- a/test/subtest_and_async.js
+++ b/test/subtest_and_async.js
@@ -5,19 +5,21 @@ var asyncFunction = function (callback) {
 };
 
 test('master test', function (t) {
-    t.test('subtest 1', function (t) {
-        t.pass('subtest 1 before async call');
+    t.test('subtest 1', function (st) {
+        st.pass('subtest 1 before async call');
         asyncFunction(function () {
-            t.pass('subtest 1 in async callback');
-            t.end();
+            st.pass('subtest 1 in async callback');
+            st.end();
         })
     });
 
-    t.test('subtest 2', function (t) {
-        t.pass('subtest 2 before async call');
+    t.test('subtest 2', function (st) {
+        st.pass('subtest 2 before async call');
         asyncFunction(function () {
-            t.pass('subtest 2 in async callback');
-            t.end();
+            st.pass('subtest 2 in async callback');
+            st.end();
         })
     });
+
+    t.end();
 });