diff --git a/core/tasks/cts.mk b/core/tasks/cts.mk
index 4cb074e..17af65f 100644
--- a/core/tasks/cts.mk
+++ b/core/tasks/cts.mk
@@ -219,9 +219,10 @@
 	$(ACP) -fv $(VMTESTS_INTERMEDIATES)/android.core.vm-tests.jar $(PRIVATE_DIR)/repository/testcases/android.core.vm-tests.jar
 
 # Generate the default test plan for User.
-$(DEFAULT_TEST_PLAN): $(cts_dir)/all_cts_files_stamp $(cts_dir)/all_cts_core_files_stamp $(cts_tools_src_dir)/utils/genDefaultTestPlan.sh $(CORE_VM_TEST_DESC)
-	$(hide) bash $(cts_tools_src_dir)/utils/genDefaultTestPlan.sh cts/tests/tests/ \
-     $(PRIVATE_DIR) $(TMP_DIR) $(TOP) $(TARGET_COMMON_OUT_ROOT) $(OUT_DIR)
+# Usage: buildCts.py <testRoot> <ctsOutputDir> <tempDir> <androidRootDir> <docletPath>
+$(DEFAULT_TEST_PLAN): $(cts_dir)/all_cts_files_stamp $(cts_dir)/all_cts_core_files_stamp $(cts_tools_src_dir)/utils/buildCts.py $(CORE_VM_TEST_DESC) $(HOST_OUT_JAVA_LIBRARIES)/descGen.jar
+	$(hide) $(cts_tools_src_dir)/utils/buildCts.py cts/tests/tests/ $(PRIVATE_DIR) $(TMP_DIR) \
+		$(TOP) $(HOST_OUT_JAVA_LIBRARIES)/descGen.jar
 
 # Package CTS and clean up.
 #