diff --git a/core/autogen_test_config.mk b/core/autogen_test_config.mk
index d2eb7c3..20c582a 100644
--- a/core/autogen_test_config.mk
+++ b/core/autogen_test_config.mk
@@ -17,8 +17,7 @@
 # This build rule allows TradeFed test config file to be created based on
 # following inputs:
 #   is_native: If the test is a native test.
-#   LOCAL_MANIFEST_FILE: Name of the AndroidManifest file for the test. If it's
-#       not set, default value `AndroidManifest.xml` will be used.
+#   full_android_manifest: Name of the AndroidManifest file for the test.
 # Output:
 #   autogen_test_config_file: Path to the test config file generated.
 
@@ -36,25 +35,17 @@
 my_auto_generate_config := true
 else
 # Auto generating test config file for instrumentation test
-ifeq ($(strip $(LOCAL_MANIFEST_FILE)),)
-  LOCAL_MANIFEST_FILE := AndroidManifest.xml
-endif
-ifdef LOCAL_FULL_MANIFEST_FILE
-  my_android_manifest := $(LOCAL_FULL_MANIFEST_FILE)
-else
-  my_android_manifest := $(LOCAL_PATH)/$(LOCAL_MANIFEST_FILE)
-endif
-ifneq (,$(wildcard $(my_android_manifest)))
+ifneq (,$(full_android_manifest))
 $(autogen_test_config_file): PRIVATE_AUTOGEN_TEST_CONFIG_SCRIPT := $(AUTOGEN_TEST_CONFIG_SCRIPT)
-$(autogen_test_config_file): PRIVATE_TEST_CONFIG_ANDROID_MANIFEST := $(my_android_manifest)
+$(autogen_test_config_file): PRIVATE_TEST_CONFIG_ANDROID_MANIFEST := $(full_android_manifest)
 $(autogen_test_config_file): PRIVATE_EMPTY_TEST_CONFIG := $(EMPTY_TEST_CONFIG)
 $(autogen_test_config_file): PRIVATE_TEMPLATE := $(INSTRUMENTATION_TEST_CONFIG_TEMPLATE)
-$(autogen_test_config_file) : $(my_android_manifest) $(EMPTY_TEST_CONFIG) $(INSTRUMENTATION_TEST_CONFIG_TEMPLATE) $(AUTOGEN_TEST_CONFIG_SCRIPT)
+$(autogen_test_config_file) : $(full_android_manifest) $(EMPTY_TEST_CONFIG) $(INSTRUMENTATION_TEST_CONFIG_TEMPLATE) $(AUTOGEN_TEST_CONFIG_SCRIPT)
 	@echo "Auto generating test config $(notdir $@)"
 	@rm -f $@
 	$(hide) $(PRIVATE_AUTOGEN_TEST_CONFIG_SCRIPT) $@ $(PRIVATE_TEST_CONFIG_ANDROID_MANIFEST) $(PRIVATE_EMPTY_TEST_CONFIG) $(PRIVATE_TEMPLATE)
 my_auto_generate_config := true
-endif # ifeq (,$(wildcard $(my_android_manifest)))
+endif # ifneq (,$(full_android_manifest))
 endif # ifneq (true,$(is_native))
 
 ifeq (true,$(my_auto_generate_config))
@@ -65,5 +56,4 @@
   autogen_test_config_file :=
 endif
 
-my_android_manifest :=
 my_auto_generate_config :=
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 4224fda..1a33153 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -469,6 +469,8 @@
 LOCAL_CUSTOM_BUILD_STEP_OUTPUT:=
 LOCAL_IS_AUX_MODULE :=
 
+full_android_manifest :=
+
 # Trim MAKEFILE_LIST so that $(call my-dir) doesn't need to
 # iterate over thousands of entries every time.
 # Leave the current makefile to make sure we don't break anything