diff --git a/changelogs/fragments/ansible_test_os_system.yml b/changelogs/fragments/ansible_test_os_system.yml
new file mode 100644
index 00000000000..cb23751655f
--- /dev/null
+++ b/changelogs/fragments/ansible_test_os_system.yml
@@ -0,0 +1,3 @@
+---
+minor_changes:
+    - ansible-test - add a rule for os.system call (https://github.com/ansible/ansible/issues/86250).
diff --git a/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/constants.py b/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/constants.py
index 18cbf665347..c769c9a70c6 100644
--- a/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/constants.py
+++ b/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/constants.py
@@ -60,6 +60,7 @@ REJECTLIST_IMPORTS = {
 }
 SUBPROCESS_REGEX = re.compile(r'subprocess\.Po.*')
 OS_CALL_REGEX = re.compile(r'os\.call.*')
+OS_SYSTEM_REGEX = re.compile(r'os\.system.*')
 
 
 PLUGINS_WITH_RETURN_VALUES = ('module', )
diff --git a/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/main.py b/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/main.py
index e9a15377f02..80506a6aba1 100644
--- a/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/main.py
+++ b/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/main.py
@@ -93,6 +93,7 @@ from .constants import (
     REJECTLIST_IMPORTS,
     SUBPROCESS_REGEX,
     OS_CALL_REGEX,
+    OS_SYSTEM_REGEX,
     PLUGINS_WITH_RETURN_VALUES,
     PLUGINS_WITH_EXAMPLES,
     PLUGINS_WITH_YAML_EXAMPLES,
@@ -483,6 +484,19 @@ class ModuleValidator(Validator):
                         column=(os_call_match.span()[0] + 1)
                     )
 
+    def _check_for_os_system(self):
+        if 'os.system' in self.text:
+            for line_no, line in enumerate(self.text.splitlines()):
+                os_system_match = OS_SYSTEM_REGEX.search(line)
+                if os_system_match:
+                    self.reporter.error(
+                        path=self.object_path,
+                        code='use-run-command-not-os-system',
+                        msg=('os.system() call found. Should be module.run_command'),
+                        line=(line_no + 1),
+                        column=(os_system_match.span()[0] + 1)
+                    )
+
     def _find_rejectlist_imports(self):
         for child in self.ast.body:
             names = []
@@ -2448,6 +2462,7 @@ class ModuleValidator(Validator):
             if self.plugin_type == 'module':
                 self._check_for_subprocess()
                 self._check_for_os_call()
+                self._check_for_os_system()
 
         if self._powershell_module():
             self._validate_ps_replacers()