diff --git a/src/integrationtest/integrationtest_drunc.py b/src/integrationtest/integrationtest_drunc.py
index 9420233..63189a2 100755
--- a/src/integrationtest/integrationtest_drunc.py
+++ b/src/integrationtest/integrationtest_drunc.py
@@ -36,6 +36,7 @@
 from daqconf.get_session_apps import get_segment_apps
 import time
 import random
+import json
 
 
 def parametrize_fixture_with_items(metafunc, fixture, itemsname):
@@ -310,6 +311,35 @@ def run_nanorc(request, create_config_files, tmp_path_factory):
 
     run_dir = tmp_path_factory.mktemp("run")
 
+    # 15-Dec-2025, KAB: if one of our integtest bundle scripts has provided information
+    # about itself in the execution environment of the currently running test, use that
+    # information to create a file in the 'run' directory of the test. This is used by the
+    # bundle script to locate which pytest directory on disk matches the running of which test.
+    try:
+        bundle_script_info = os.environ["DUNEDAQ_INTEGTEST_BUNDLE_INFO"]
+        info_list = bundle_script_info.split(';')
+        if (len(info_list) == 3):
+            bundle_info_data = {
+                "description": "This file was automatically generated by the DUNE DAQ integrationtest infrastructure. It contains information about the 'bundle' script that ran this test.",
+                "bundle_script_start_time": info_list[0],
+                "bundle_script_process_id": info_list[1],
+                "individual_test_start_time": info_list[2]
+                }
+            bundle_file_name = f"{run_dir}/bundle_script_info.json"
+            try:
+                with open(f"{bundle_file_name}", "w") as info_file:
+                    json.dump(bundle_info_data, info_file, indent=2)
+            except FileNotFoundError:
+                print(f"\n*** Warning: unable to write bundle info data to file {bundle_file_name}")
+        else:
+            print("\n*** Warning: the DUNEDAQ_INTEGTEST_BUNDLE_INFO env var is set, but it doesn't seem")
+            print(  "    to contain the expected 3 values that are used to help bundle scripts match")
+            print(  "    pytest directories to individual tests that are run.")
+            print( f"    Contents of the env var: '{bundle_script_info}'")
+    except KeyError:
+        # if the expected env var is not set, we simply don't create the bundle info file
+        pass
+
     connsvc_obj = None
     if (
         not disable_connectivity_service