diff --git a/modules/testrail.py b/modules/testrail.py
index 9f2f71d6f..d0677d079 100644
--- a/modules/testrail.py
+++ b/modules/testrail.py
@@ -160,6 +160,10 @@ def get_test_case(self, case_id):
         """Get a given Test Case"""
         return self.client.send_get(f"get_case/{case_id}")
 
+    def get_suites(self, project_id):
+        """Get all suites for project"""
+        return self.client.send_get(f"get_suites/{project_id}")
+
     def update_cases_in_suite(self, suite_id, case_ids, **kwargs):
         """Given a suite and a list of test cases, update all listed
         test cases according to keyword args"""
diff --git a/modules/testrail_scripts/testrail_change_to_smoke_and_sanity_all_automation_completed.py b/modules/testrail_scripts/testrail_change_to_smoke_and_sanity_all_automation_completed.py
new file mode 100644
index 000000000..242744650
--- /dev/null
+++ b/modules/testrail_scripts/testrail_change_to_smoke_and_sanity_all_automation_completed.py
@@ -0,0 +1,128 @@
+import logging
+from dotenv import load_dotenv
+from modules.testrail_integration import testrail_init
+
+# Load environment variables from .env file (like API credentials)
+load_dotenv()
+
+# Configuration Constants
+PROJECT_ID = 17  # ID of the TestRail project to work with
+SUITE_NAMES = [
+    "[QA-2617] Nimbus Scotch Bonnet",
+    "Address Bar 138+",
+    "Address Bar and Search <136 (to use with late beta) - locked",
+    "Address Bar and Search Scotch Bonnet (to use with early beta)",
+    "Audio/Video",
+    "Bookmarks and History",
+    "Build Branding",
+    "Downloads",
+    "Drag and Drop",
+    "Find Toolbar",
+    "Form Autofill",
+    "Geolocation",
+    "Language Packs",
+    "Menus",
+    "Networking",
+    "Notifications, Push Notifications and Alerts",
+    "PDF Viewer",
+    "Password manager",
+    "Preferences",
+    "Printing",
+    "Reader View",
+    "Scrolling, Panning and Zooming",
+    "Security and Privacy",
+    "Startup and Profile",
+    "Sync & Firefox Account",
+    "Tabbed Browser",
+    "Theme and Toolbar Customization"
+]  # Only process suites with this name
+
+CUSTOM_SUB_TEST_SUITES = [2]  # Value to set for 'custom_sub_test_suites' field (e.g. 'Smoke')
+DRY_RUN = True  # If True, simulate updates without sending changes
+
+
+def get_all_cases_from_suite(tr, project_id, suite_id):
+    """
+    Fetch all test cases from a given TestRail suite using pagination.
+
+    Args:
+        tr: TestRail API client instance.
+        project_id (int): The TestRail project ID.
+        suite_id (int): The specific suite ID within the project.
+
+    Returns:
+        list: All test cases as a list of dictionaries.
+    """
+    all_cases = []  # List to hold all fetched cases
+    offset = 0      # Pagination offset
+    limit = 240     # API fetch limit per request
+
+    while True:
+        # Build API URL with pagination
+        endpoint = f"get_cases/{project_id}&suite_id={suite_id}&limit={limit}&offset={offset}"
+        response = tr.client.send_get(endpoint)
+        cases = response.get("cases", [])
+
+        if not cases:
+            # Break loop when no more cases are returned
+            break
+
+        all_cases.extend(cases)
+
+        # If we receive less than the limit, it means we've reached the last page
+        if len(cases) < limit:
+            break
+
+        offset += limit  # Move to next page
+
+    logging.info(f"Total cases fetched from suite {suite_id}: {len(all_cases)}")
+    return all_cases
+
+
+if __name__ == "__main__":
+    logging.basicConfig(level=logging.INFO)  # Enable info-level logging
+    tr = testrail_init()  # Initialize the TestRail client
+
+    # Get all suites for the project and filter the ones we need
+    suites = tr.get_suites(PROJECT_ID)
+    suite_ids = [suite["id"] for suite in suites if suite["name"] in SUITE_NAMES]
+    logging.info(f"Found suites: {suite_ids}")
+
+    # Gather all test cases from selected suites
+    all_cases = []
+    for suite_id in suite_ids:
+        cases = get_all_cases_from_suite(tr, PROJECT_ID, suite_id)
+        all_cases.extend(cases)
+
+    logging.info(f"Total test cases found for selected suites: {len(all_cases)}")
+
+    updated_count = 0  # Track how many cases we updated
+
+    # Iterate over all test cases
+    for case in all_cases:
+        case_id = case["id"]
+        automation_status = case.get("custom_automation_status")  # Read the automation status field
+        current_custom_value = case.get("custom_sub_test_suites", "Not Set")  # Read current custom field value
+
+        logging.info(f"Case ID {case_id} custom_automation_status: {automation_status}")
+
+        # Only proceed if the custom automation status equals 4 (4 = Completed)
+        if automation_status != 4:
+            logging.info(f"Skipping case {case_id} – custom_automation_status = {automation_status}")
+            continue
+
+        logging.info(
+            f"Case ID {case_id} matches (custom_automation_status == 4). "
+            f"Current custom_sub_test_suites: {current_custom_value}"
+        )
+
+        # Update the field if not in dry run mode
+        if not DRY_RUN:
+            result = tr.update_case_field(case_id, "custom_sub_test_suites", [2])
+            logging.info(f"Updated case {case_id} to '[2]', Result: {result}")
+        else:
+            logging.info(f"[DRY RUN] Would update case {case_id} from '{current_custom_value}' to '[2]'.")
+
+        updated_count += 1  # Count how many updates we made (or would have made)
+
+    logging.info(f"Total cases {'updated' if not DRY_RUN else 'to be updated'}: {updated_count}")