diff --git a/test-environments/multinode.yaml b/test-environments/multinode.yaml
index 5dd7a3a43..6d76047c7 100644
--- a/test-environments/multinode.yaml
+++ b/test-environments/multinode.yaml
@@ -42,3 +42,5 @@ parameter_defaults:
   ControllerExtraConfig:
     nova::compute::libvirt::services::libvirt_virt_type: qemu
     nova::compute::libvirt::libvirt_virt_type: qemu
+    # Required for Centos 7.3 and Qemu 2.6.0
+    nova::compute::libvirt::libvirt_cpu_mode: 'none'
diff --git a/test-environments/worker-config-mitaka-and-below.yaml b/test-environments/worker-config-mitaka-and-below.yaml
index 1a891a82e..83bbfbaf2 100644
--- a/test-environments/worker-config-mitaka-and-below.yaml
+++ b/test-environments/worker-config-mitaka-and-below.yaml
@@ -14,3 +14,6 @@ parameter_defaults:
   NeutronWorkers: 1
   NovaWorkers: 1
   SwiftWorkers: 1
+  NovaComputeExtraConfig:
+    # Required for Centos 7.3 and Qemu 2.6.0
+    nova::compute::libvirt::libvirt_cpu_mode: 'none'
diff --git a/test-environments/worker-config.yaml b/test-environments/worker-config.yaml
index cb5a59375..67bceea96 100644
--- a/test-environments/worker-config.yaml
+++ b/test-environments/worker-config.yaml
@@ -5,3 +5,6 @@ parameter_defaults:
     heat::api_cloudwatch::enabled: false
     heat::api_cfn::enabled: false
     heat::rpc_response_timeout: 600
+  NovaComputeExtraConfig:
+    # Required for Centos 7.3 and Qemu 2.6.0
+    nova::compute::libvirt::libvirt_cpu_mode: 'none'