Try running SSM connection tests in parallel.

tests/integration/targets/connection/test_connection.yml

@@ -1,6 +1,6 @@
 - hosts: "{{ target_hosts }}"
   gather_facts: no
-  serial: 1
+  strategy: free
   tasks:
 
   ### test wait_for_connection plugin

tests/integration/targets/connection_aws_ssm/aws_ssm_integration_test_setup/tasks/main.yml

@@ -106,15 +106,10 @@
         name: "{{resource_prefix}}-aws-ssm-s3"
       register: s3_output
 
-    - name: Create Inventory file for Linux host
+    - name: Create Inventory file
       template:
-        dest: "{{playbook_dir}}/inventory-linux.aws_ssm"
-        src: inventory-linux.aws_ssm.j2
-
-    - name: Create Inventory file for Windows host
-      template:
-        dest: "{{playbook_dir}}/inventory-windows.aws_ssm"
-        src: inventory-windows.aws_ssm.j2
+        dest: "{{playbook_dir}}/ssm_inventory"
+        src: inventory-combined.aws_ssm.j2
 
     - name: Create AWS Keys Environement
       template:

tests/integration/targets/connection_aws_ssm/aws_ssm_integration_test_setup/templates/inventory-combined.aws_ssm.j2

@@ -0,0 +1,28 @@
+[aws_ssm_linux]
+linux_{{linux_output.instance_ids[0]}} ansible_aws_ssm_instance_id={{linux_output.instance_ids[0]}} ansible_aws_ssm_region={{aws_region}}
+
+[aws_ssm_linux:vars]
+remote_tmp=/tmp/ansible-remote
+action_prefix=
+
+[aws_ssm_windows]
+windows_{{windows_output.instance_ids[0]}} ansible_aws_ssm_instance_id={{windows_output.instance_ids[0]}} ansible_aws_ssm_region={{aws_region}}
+
+[aws_ssm_windows:vars]
+ansible_shell_type=powershell
+remote_tmp=c:/windows/temp/ansible-remote
+action_prefix=win_
+
+[aws_ssm:children]
+aws_ssm_linux
+aws_ssm_windows
+
+[aws_ssm:vars]
+ansible_connection=community.aws.aws_ssm
+ansible_aws_ssm_bucket_name={{s3_output.name}}
+ansible_aws_ssm_plugin=/usr/local/sessionmanagerplugin/bin/session-manager-plugin
+ansible_python_interpreter=/usr/bin/env python
+
+# support tests that target testhost
+[testhost:children]
+aws_ssm

tests/integration/targets/connection_aws_ssm/aws_ssm_integration_test_setup/templates/inventory-linux.aws_ssm.j2

@@ -1,11 +1,16 @@
-[aws_ssm]
+[aws_ssm_linux]
 {{linux_output.instance_ids[0]}} ansible_aws_ssm_instance_id={{linux_output.instance_ids[0]}} ansible_aws_ssm_region={{aws_region}}
 
-[aws_ssm:vars]
+[aws_ssm_linux:vars]
 ansible_connection=community.aws.aws_ssm
 ansible_aws_ssm_bucket_name={{s3_output.name}}
 ansible_aws_ssm_plugin=/usr/local/sessionmanagerplugin/bin/session-manager-plugin
 ansible_python_interpreter=/usr/bin/env python
+remote_tmp=/tmp/ansible-remote
+action_prefix=
+
+[aws_ssm:children]
+aws_ssm_linux
 
 # support tests that target testhost
 [testhost:children]

tests/integration/targets/connection_aws_ssm/aws_ssm_integration_test_setup/templates/inventory-windows.aws_ssm.j2

@@ -1,11 +1,16 @@
-[aws_ssm]
+[aws_ssm_windows]
 {{windows_output.instance_ids[0]}} ansible_aws_ssm_instance_id={{windows_output.instance_ids[0]}} ansible_aws_ssm_region={{aws_region}}
 
-[aws_ssm:vars]
+[aws_ssm_windows:vars]
 ansible_shell_type=powershell
 ansible_connection=community.aws.aws_ssm
 ansible_aws_ssm_bucket_name={{s3_output.name}}
 ansible_aws_ssm_plugin=/usr/local/sessionmanagerplugin/bin/session-manager-plugin
+remote_tmp=c:/windows/temp/ansible-remote
+action_prefix=win_
+
+[aws_ssm:children]
+aws_ssm_linux
 
 # support tests that target testhost
 [testhost:children]

tests/integration/targets/connection_aws_ssm/runme.sh

@@ -25,18 +25,8 @@ set -x
 
 cd ../connection
 
-# Execute Integration tests for Linux
-INVENTORY=../connection_aws_ssm/inventory-linux.aws_ssm ./test.sh \
+# Execute Integration tests
+INVENTORY=../connection_aws_ssm/ssm_inventory ./test.sh \
     -e target_hosts=aws_ssm \
     -e local_tmp=/tmp/ansible-local \
-    -e remote_tmp=/tmp/ansible-remote \
-    -e action_prefix= \
-    "$@"
-
-# Execute Integration tests for Windows
-INVENTORY=../connection_aws_ssm/inventory-windows.aws_ssm ./test.sh \
-    -e target_hosts=aws_ssm \
-    -e local_tmp=/tmp/ansible-local \
-    -e remote_tmp=c:/windows/temp/ansible-remote \
-    -e action_prefix=win_ \
     "$@"