diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 2ff9e1dede..476ca07807 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -16,7 +16,7 @@ x.x.x
 
 * Add support for ap-east-1 region (Hong Kong)
 * Add possibility to specify instance type to use when building custom AMIs with ``pcluster createami``
-* Speed up cluster creation by having compute nodes starting together with master node
+* Speed up cluster creation by having compute nodes starting together with master node. **Note** this requires one new IAM permissions in the `ParallelClusterInstancePolicy <https://docs.aws.amazon.com/en_us/parallelcluster/latest/ug/iam.html#parallelclusterinstancepolicy>`_, ``cloudformation:DescribeStackResource``
 * Enable ASG CloudWatch metrics for the ASG managing compute nodes. **Note** this requires two new IAM permissions in the `ParallelClusterUserPolicy <https://docs.aws.amazon.com/parallelcluster/latest/ug/iam.html#parallelclusteruserpolicy>`_, ``autoscaling:DisableMetricsCollection`` and ``autoscaling:EnableMetricsCollection``
 * Install Intel MPI 2019u4 on Amazon Linux, Centos 7 and Ubuntu 1604
 * Upgrade Elastic Fabric Adapter (EFA) to version 1.4.1 that supports Intel MPI
diff --git a/tests/integration-tests/test_runner.py b/tests/integration-tests/test_runner.py
index b0c668ce64..8d3cd4053a 100644
--- a/tests/integration-tests/test_runner.py
+++ b/tests/integration-tests/test_runner.py
@@ -352,6 +352,17 @@ def _run_parallel(args):
         job.join()
 
 
+def _check_args(args):
+    # If --cluster is set only one os, scheduler, instance type and region can be provided
+    if args.cluster:
+        if len(args.oss) > 1 or len(args.schedulers) > 1 or len(args.instances) > 1 or len(args.regions) > 1:
+            logger.error(
+                "when cluster option is specified, you can have a single value for oss, regions, instances "
+                "and schedulers and you need to make sure they match the cluster specific ones"
+            )
+            exit(1)
+
+
 def _run_sequential(args):
     # Redirect stdout to file
     if not args.show_output:
@@ -369,6 +380,7 @@ def main():
         exit(1)
 
     args = _init_argparser().parse_args()
+    _check_args(args)
     logger.info("Starting tests with parameters {0}".format(args))
 
     _make_logging_dirs(args.output_dir)
diff --git a/tests/integration-tests/tests/networking/test_networking.py b/tests/integration-tests/tests/networking/test_networking.py
index 3120f972b5..8e2b17cb3f 100644
--- a/tests/integration-tests/tests/networking/test_networking.py
+++ b/tests/integration-tests/tests/networking/test_networking.py
@@ -50,6 +50,7 @@ def vpc_stack(vpc_stacks, region):
     return vpc_stacks[region]
 
 
+@pytest.mark.regions(["eu-central-1", "us-gov-east-1", "cn-northwest-1"])
 def test_public_network_topology(region, vpc_stack, networking_stack_factory):
     ec2_client = boto3.client("ec2", region_name=region)
     vpc_id = vpc_stack.cfn_outputs["VpcId"]
@@ -57,6 +58,9 @@ def test_public_network_topology(region, vpc_stack, networking_stack_factory):
     availability_zone = AVAILABILITY_ZONE_OVERRIDES.get(region, "")
     internet_gateway_id = vpc_stack.cfn_resources["InternetGateway"]
 
+    if isinstance(availability_zone, list):
+        availability_zone = availability_zone[0]
+
     parameters = _get_cfn_parameters(
         availability_zone, internet_gateway_id=internet_gateway_id, vpc_id=vpc_id, public_cidr=public_subnet_cidr
     )
@@ -72,6 +76,7 @@ def test_public_network_topology(region, vpc_stack, networking_stack_factory):
     )
 
 
+@pytest.mark.regions(["eu-central-1", "us-gov-east-1", "cn-northwest-1"])
 def test_public_private_network_topology(region, vpc_stack, networking_stack_factory):
     ec2_client = boto3.client("ec2", region_name=region)
     vpc_id = vpc_stack.cfn_outputs["VpcId"]
@@ -80,6 +85,9 @@ def test_public_private_network_topology(region, vpc_stack, networking_stack_fac
     availability_zone = AVAILABILITY_ZONE_OVERRIDES.get(region, "")
     internet_gateway_id = vpc_stack.cfn_resources["InternetGateway"]
 
+    if isinstance(availability_zone, list):
+        availability_zone = availability_zone[0]
+
     parameters = _get_cfn_parameters(
         availability_zone,
         internet_gateway_id=internet_gateway_id,