diff --git a/tools/ci/dynamic_pipelines/scripts/patch_buildv2_child_pipeline.py b/tools/ci/dynamic_pipelines/scripts/patch_buildv2_child_pipeline.py
index e67325ff24b..781cd5524fb 100644
--- a/tools/ci/dynamic_pipelines/scripts/patch_buildv2_child_pipeline.py
+++ b/tools/ci/dynamic_pipelines/scripts/patch_buildv2_child_pipeline.py
@@ -53,6 +53,8 @@ def patch(path: str) -> None:
     # keyword level, so only `script` is overridden; `needs`, `artifacts`,
     # `image`, etc. come from the included version.
     d['generate_pytest_child_pipeline'] = {
+        # Set IDF_BUILD_V2 so test-case collection honors `if IDF_BUILD_V2 == "1"`
+        'variables': {'IDF_BUILD_V2': '1'},
         'script': [
             'python tools/ci/dynamic_pipelines/scripts/generate_target_test_child_pipeline.py',
             'python tools/ci/dynamic_pipelines/scripts/patch_buildv2_target_test_pipeline.py '