diff --git a/plugins/modules/aci_cloud_subnet.py b/plugins/modules/aci_cloud_subnet.py
index 6855a6df9..bfdad0a33 100644
--- a/plugins/modules/aci_cloud_subnet.py
+++ b/plugins/modules/aci_cloud_subnet.py
@@ -59,19 +59,19 @@
   aws_availability_zone:
     description:
     - The cloud zone which is attached to the given cloud context profile.
-    - Only used when it is an AWS cloud apic.
+    - Only used when it is an AWS Cloud APIC.
     type: str
     aliases: [availability_zone, av_zone, zone]
   vnet_gateway:
     description:
     - Determine if a vNet Gateway Router will be deployed or not.
-    - Only used when it is an Azure cloud apic.
+    - Only used when it is an Azure Cloud APIC.
     type: bool
     default: false
   azure_region:
     description:
     - The Azure cloud region to attach this subnet to.
-    - Only used when it is an Azure cloud apic.
+    - Only used when it is an Azure Cloud APIC.
     type: str
     aliases: [az_region]
   state:
@@ -273,6 +273,7 @@ def main():
             ["state", "absent", ["tenant", "cloud_context_profile", "cidr", "address"]],
             ["state", "present", ["tenant", "cloud_context_profile", "cidr", "address"]],
         ],
+        mutually_exclusive=[("aws_availability_zone", "azure_region")],
     )
 
     name = module.params.get("name")
@@ -288,9 +289,6 @@ def main():
     azure_region = module.params.get("azure_region")
     child_configs = []
 
-    if aws_availability_zone and azure_region:
-        module.fail_json(msg="Configuring both an AWS availability zone and an Azure region is invalid.")
-
     aci = ACIModule(module)
     aci.construct_url(
         root_class=dict(aci_class="fvTenant", aci_rn="tn-{0}".format(tenant), target_filter='eq(fvTenant.name, "{0}")'.format(tenant), module_object=tenant),
diff --git a/tests/integration/targets/aci_cloud_subnet/tasks/main.yml b/tests/integration/targets/aci_cloud_subnet/tasks/main.yml
index 7db54a4ec..8e6a9a15a 100644
--- a/tests/integration/targets/aci_cloud_subnet/tasks/main.yml
+++ b/tests/integration/targets/aci_cloud_subnet/tasks/main.yml
@@ -126,7 +126,7 @@
       - nm_add_subnet_again.previous.0.cloudSubnet.attributes.dn == "uni/tn-ansible_test/ctxprofile-ctx_profile_1/cidr-[10.50.0.0/16]/subnet-[10.50.0.1]"
       - nm_add_subnet_again.previous.0.cloudSubnet.attributes.annotation == "orchestrator:ansible"
       - nm_add_subnet_again.previous.0.cloudSubnet.attributes.scope == "private"
-      - nm_invalid_subnet_zone.msg == "Configuring both an AWS availability zone and an Azure region is invalid."
+      - nm_invalid_subnet_zone.msg == "parameters are mutually exclusive{{":"}} aws_availability_zone|azure_region"
 
   - name: Verify create tasks for Azure
     ansible.builtin.assert: