diff --git a/.kokoro/environment_tests.sh b/.kokoro/environment_tests.sh
index 2b6fa5177..c80c51d65 100755
--- a/.kokoro/environment_tests.sh
+++ b/.kokoro/environment_tests.sh
@@ -49,12 +49,11 @@ gcloud config set compute/zone us-central1-b
 # authenticate docker
 gcloud auth configure-docker -q
 
-# Remove old nox
-python3.6 -m pip uninstall --yes --quiet nox-automation
-
 # Install nox
-python3.6 -m pip install --upgrade --quiet nox
-python3.6 -m nox --version
+virtualenv .venv
+source .venv/bin/activate
+python3 -m pip install --upgrade --quiet nox
+python3 -m nox --version
 
 # Install kubectl
 if [[ "${ENVIRONMENT}" == "kubernetes" ]]; then
@@ -73,7 +72,7 @@ echo $ENVCTL_ID
 # Run the specified environment test
 set +e
 
-python3.6 -m nox --session "tests(language='python', platform='$ENVIRONMENT')"
+python3 -m nox --session "tests(language='python', platform='$ENVIRONMENT')"
 TEST_STATUS_CODE=$?
 
 # destroy resources
diff --git a/.kokoro/performance/presubmit.cfg b/.kokoro/performance/performance.cfg
similarity index 100%
rename from .kokoro/performance/presubmit.cfg
rename to .kokoro/performance/performance.cfg
diff --git a/tests/performance/test_performance.py b/tests/performance/test_performance.py
index 0f9888f7a..d028a49e8 100644
--- a/tests/performance/test_performance.py
+++ b/tests/performance/test_performance.py
@@ -196,7 +196,7 @@ def test_client_init_performance(self, time_limit=0.25):
         total_time = self._print_results(pr, results, time_limit, "Client Init")
         self.assertLessEqual(total_time, time_limit)
 
-    def test_structured_logging_performance(self, time_limit=10):
+    def test_structured_logging_performance(self, time_limit=12):
         """
         Test the performance of StructuredLoggingHandler
 
@@ -278,7 +278,7 @@ def profiled_code(logger, payload, num_logs=100, flush=False):
         total_time = self._print_results(pr, results, time_limit, "CloudLoggingHandler")
         self.assertLessEqual(total_time, time_limit)
 
-    def test_logging_performance(self, time_limit=15):
+    def test_logging_performance(self, time_limit=20):
         """
         Test the performance of logger
 
@@ -312,7 +312,7 @@ def profiled_code(logger, payload, num_logs=100):
         total_time = self._print_results(pr, results, time_limit, "Logger.Log")
         self.assertLessEqual(total_time, time_limit)
 
-    def test_batch_performance(self, time_limit=10):
+    def test_batch_performance(self, time_limit=12):
         """
         Test the performance of logger