diff --git a/tests/script/test_determine_jobs.py b/tests/script/test_determine_jobs.py
index 3fd5eada94..202ae9030f 100644
--- a/tests/script/test_determine_jobs.py
+++ b/tests/script/test_determine_jobs.py
@@ -1518,6 +1518,7 @@ def test_clang_tidy_mode_full_scan(
     mock_should_run_clang_tidy: Mock,
     mock_should_run_clang_format: Mock,
     mock_should_run_python_linters: Mock,
+    mock_determine_cpp_unit_tests: Mock,
     mock_changed_files: Mock,
     capsys: pytest.CaptureFixture[str],
     monkeypatch: pytest.MonkeyPatch,
@@ -1529,6 +1530,9 @@ def test_clang_tidy_mode_full_scan(
     mock_should_run_clang_tidy.return_value = True
     mock_should_run_clang_format.return_value = False
     mock_should_run_python_linters.return_value = False
+    # Without this mock, main() runs the real determine_cpp_unit_tests
+    # which loads the full component graph (~5s import of every component).
+    mock_determine_cpp_unit_tests.return_value = (False, [])
 
     # Mock changed_files to return no component files
     mock_changed_files.return_value = []
@@ -1584,6 +1588,7 @@ def test_clang_tidy_mode_targeted_scan(
     mock_should_run_clang_tidy: Mock,
     mock_should_run_clang_format: Mock,
     mock_should_run_python_linters: Mock,
+    mock_determine_cpp_unit_tests: Mock,
     mock_changed_files: Mock,
     capsys: pytest.CaptureFixture[str],
     monkeypatch: pytest.MonkeyPatch,
@@ -1595,6 +1600,9 @@ def test_clang_tidy_mode_targeted_scan(
     mock_should_run_clang_tidy.return_value = True
     mock_should_run_clang_format.return_value = False
     mock_should_run_python_linters.return_value = False
+    # Without this mock, main() runs the real determine_cpp_unit_tests
+    # which loads the full component graph (~5s import of every component).
+    mock_determine_cpp_unit_tests.return_value = (False, [])
 
     # Create component names
     components = [f"comp{i}" for i in range(component_count)]
@@ -2651,6 +2659,15 @@ def test_main_force_all_overrides_detection(
             return_value={"should_run": "false"},
         ),
         patch.object(determine_jobs, "should_run_benchmarks", return_value=False),
+        # create_intelligent_batches scans every tests/components/<name>/*.yaml
+        # under --force-all (~2500 YAML loads, ~10s in CI). This test only
+        # asserts that main() routes to it and returns non-empty -- the
+        # batching logic itself has its own dedicated tests.
+        patch.object(
+            determine_jobs,
+            "create_intelligent_batches",
+            return_value=([["fake_batch"]], None),
+        ),
     ):
         determine_jobs.main()