diff --git a/appengine/standard/iap/main_test.py b/appengine/standard/iap/main_test.py
index 77a5b6403e5..839671ca0ef 100644
--- a/appengine/standard/iap/main_test.py
+++ b/appengine/standard/iap/main_test.py
@@ -12,9 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import main
 import webtest
 
+import main
+
 
 def test_index(testbed, login):
     app = webtest.TestApp(main.app)
diff --git a/appengine/standard/iap/requirements-test.txt b/appengine/standard/iap/requirements-test.txt
index c607ba3b2ab..e94ef29cc76 100644
--- a/appengine/standard/iap/requirements-test.txt
+++ b/appengine/standard/iap/requirements-test.txt
@@ -1,3 +1,4 @@
 # pin pytest to 4.6.11 for Python2.
 pytest==4.6.11; python_version < '3.0'
+pytest==8.3.2; python_version >= '3.0'
 WebTest==2.0.35; python_version < '3.0'
diff --git a/appengine/standard/iap/requirements.txt b/appengine/standard/iap/requirements.txt
index ac3af423a43..118baae465c 100644
--- a/appengine/standard/iap/requirements.txt
+++ b/appengine/standard/iap/requirements.txt
@@ -2,3 +2,4 @@ Flask==1.1.4; python_version < '3.0'
 Flask==2.1.0; python_version > '3.0'
 Werkzeug==1.0.1; python_version < '3.0'
 Werkzeug==3.0.3; python_version > '3.0'
+six==1.16.0