diff --git a/tools/run_tests/xds_k8s_test_driver/framework/test_app/runners/k8s/gamma_server_runner.py b/tools/run_tests/xds_k8s_test_driver/framework/test_app/runners/k8s/gamma_server_runner.py
index 46dc7e2a264..b50c6aa487b 100644
--- a/tools/run_tests/xds_k8s_test_driver/framework/test_app/runners/k8s/gamma_server_runner.py
+++ b/tools/run_tests/xds_k8s_test_driver/framework/test_app/runners/k8s/gamma_server_runner.py
@@ -70,7 +70,7 @@ class GammaServerRunner(KubernetesServerRunner):
         safilter_name: str = "ssa-filter",
         sapolicy_name: str = "ssa-policy",
         bepolicy_name: str = "backend-policy",
-        termination_grace_period_seconds: Optional[int] = None,
+        termination_grace_period_seconds: int = 0,
         pre_stop_hook: bool = False,
     ):
         # pylint: disable=too-many-locals
diff --git a/tools/run_tests/xds_k8s_test_driver/framework/xds_gamma_testcase.py b/tools/run_tests/xds_k8s_test_driver/framework/xds_gamma_testcase.py
index 8734a41be3b..ab8d6529494 100644
--- a/tools/run_tests/xds_k8s_test_driver/framework/xds_gamma_testcase.py
+++ b/tools/run_tests/xds_k8s_test_driver/framework/xds_gamma_testcase.py
@@ -30,16 +30,13 @@ XdsTestServer = server_app.XdsTestServer
 
 logger = logging.getLogger(__name__)
 
-# We never actually hit this timeout under normal circumstances, so this large
-# value is acceptable.
-_TERMINATION_GRACE_PERIOD_SECONDS = 600
-
 
 # TODO(sergiitk): [GAMMA] Move into framework/test_cases
 class GammaXdsKubernetesTestCase(xds_k8s_testcase.RegularXdsKubernetesTestCase):
     server_runner: GammaServerRunner
     frontend_service_name: str
     pre_stop_hook: Optional[bool] = None
+    termination_grace_period_seconds: int = 0
 
     def setUp(self):
         """Hook method for setting up the test fixture before exercising it."""
@@ -113,7 +110,7 @@ class GammaXdsKubernetesTestCase(xds_k8s_testcase.RegularXdsKubernetesTestCase):
             network=self.network,
             debug_use_port_forwarding=self.debug_use_port_forwarding,
             enable_workload_identity=self.enable_workload_identity,
-            termination_grace_period_seconds=_TERMINATION_GRACE_PERIOD_SECONDS,
+            termination_grace_period_seconds=self.termination_grace_period_seconds,
             pre_stop_hook=self.pre_stop_hook,
         )
 
diff --git a/tools/run_tests/xds_k8s_test_driver/tests/gamma/affinity_test.py b/tools/run_tests/xds_k8s_test_driver/tests/gamma/affinity_test.py
index e671ebcdec8..156b9b123d1 100644
--- a/tools/run_tests/xds_k8s_test_driver/tests/gamma/affinity_test.py
+++ b/tools/run_tests/xds_k8s_test_driver/tests/gamma/affinity_test.py
@@ -34,6 +34,11 @@ RpcTypeUnaryCall = xds_url_map_testcase.RpcTypeUnaryCall
 
 _REPLICA_COUNT = 3
 
+# TODO(rbellevi): set this property on the prestop hook test class
+# We never actually hit this timeout under normal circumstances, so this large
+# value is acceptable.
+# termination_grace_period_seconds: int = 600
+
 
 class AffinityTest(xds_gamma_testcase.GammaXdsKubernetesTestCase):
     def getClientRpcStats(