diff --git a/CleanSpec.mk b/CleanSpec.mk
index a97c71a..586b909 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -378,6 +378,9 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/priv-app/*)
 
+$(call add-clean-step, rm -rf $(HOST_OUT_TESTCASES))
+$(call add-clean-step, rm -rf $(TARGET_OUT_TESTCASES))
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************
diff --git a/core/base_rules.mk b/core/base_rules.mk
index 6722af4..0e3bd68 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -368,47 +368,44 @@
 endif
 
 ###########################################################
-## Compatibiliy suite files.
+## Compatibility suite files.
 ###########################################################
 ifdef LOCAL_COMPATIBILITY_SUITE
-ifneq ($(words $(LOCAL_COMPATIBILITY_SUITE)),1)
-$(error $(LOCAL_PATH):$(LOCAL_MODULE) LOCAL_COMPATIBILITY_SUITE can be only one name)
-endif
 
 # The module itself.
-my_compat_dist := \
-  $(LOCAL_BUILT_MODULE):$(COMPATIBILITY_TESTCASES_OUT_$(LOCAL_COMPATIBILITY_SUITE))/$(my_installed_module_stem)
+$(foreach suite, $(LOCAL_COMPATIBILITY_SUITE), \
+  $(eval my_compat_dist_$(suite) := $(foreach dir, $(call compatibility_suite_dirs,$(suite)), \
+    $(LOCAL_BUILT_MODULE):$(dir)/$(my_installed_module_stem))))
 
 # Make sure we only add the files once for multilib modules.
 ifndef $(my_prefix)$(LOCAL_MODULE_CLASS)_$(LOCAL_MODULE)_compat_files
 $(my_prefix)$(LOCAL_MODULE_CLASS)_$(LOCAL_MODULE)_compat_files := true
 
 # LOCAL_COMPATIBILITY_SUPPORT_FILES is a list of <src>[:<dest>].
-my_compat_dist += $(foreach f, $(LOCAL_COMPATIBILITY_SUPPORT_FILES),\
-  $(eval p := $(subst :,$(space),$(f)))\
-  $(eval s := $(word 1,$(p)))\
-  $(eval d := $(COMPATIBILITY_TESTCASES_OUT_$(LOCAL_COMPATIBILITY_SUITE))/$(or $(word 2,$(p)),$(notdir $(word 1,$(p)))))\
-  $(s):$(d))
+$(foreach suite, $(LOCAL_COMPATIBILITY_SUITE), \
+  $(eval my_compat_dist_$(suite) += $(foreach f, $(LOCAL_COMPATIBILITY_SUPPORT_FILES), \
+    $(eval p := $(subst :,$(space),$(f))) \
+    $(eval s := $(word 1,$(p))) \
+    $(eval n := $(or $(word 2,$(p)),$(notdir $(word 1, $(p))))) \
+    $(foreach dir, $(call compatibility_suite_dirs,$(suite)), \
+      $(s):$(dir)/$(n)))))
+
 
 ifneq (,$(wildcard $(LOCAL_PATH)/AndroidTest.xml))
-my_compat_dist += \
-  $(LOCAL_PATH)/AndroidTest.xml:$(COMPATIBILITY_TESTCASES_OUT_$(LOCAL_COMPATIBILITY_SUITE))/$(LOCAL_MODULE).config
+$(foreach suite, $(LOCAL_COMPATIBILITY_SUITE), \
+  $(eval my_compat_dist_$(suite) += $(foreach dir, $(call compatibility_suite_dirs,$(suite)), \
+    $(LOCAL_PATH)/AndroidTest.xml:$(dir)/$(LOCAL_MODULE).config)))
 endif
 
 ifneq (,$(wildcard $(LOCAL_PATH)/DynamicConfig.xml))
-my_compat_dist += \
-  $(LOCAL_PATH)/DynamicConfig.xml:$(COMPATIBILITY_TESTCASES_OUT_$(LOCAL_COMPATIBILITY_SUITE))/$(LOCAL_MODULE).dynamic
+$(foreach suite, $(LOCAL_COMPATIBILITY_SUITE), \
+  $(eval my_compat_dist_$(suite) += $(foreach dir, $(call compatibility_suite_dirs,$(suite)), \
+    $(LOCAL_PATH)/DynamicConfig.xml:$(dir)/$(LOCAL_MODULE).dynamic)))
 endif
 endif # $(my_prefix)$(LOCAL_MODULE_CLASS)_$(LOCAL_MODULE)_compat_files
 
-my_compat_files := $(call copy-many-files, $(my_compat_dist))
+$(call create-suite-dependencies)
 
-COMPATIBILITY.$(LOCAL_COMPATIBILITY_SUITE).FILES := \
-  $(COMPATIBILITY.$(LOCAL_COMPATIBILITY_SUITE).FILES) \
-  $(my_compat_files)
-
-# Copy over the compatibility files when user runs mm/mmm.
-$(my_register_name) : $(my_compat_files)
 endif  # LOCAL_COMPATIBILITY_SUITE
 
 ###########################################################
diff --git a/core/definitions.mk b/core/definitions.mk
index 84ea801..2023a98 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2890,6 +2890,30 @@
 endef
 
 ###########################################################
+## Compatibility suite tools
+###########################################################
+
+# Return a list of output directories for a given suite and the current LOCAL_MODULE
+define compatibility_suite_dirs
+  $(strip \
+    $(COMPATIBILITY_TESTCASES_OUT_$(1)) \
+    $($(my_prefix)OUT_TESTCASES)/$(LOCAL_MODULE))
+endef
+
+# For each suite:
+# 1. Copy the files to the many suite output directories.
+# 2. Add all the files to each suite's dependent files list.
+# 3. Do the dependency addition to my_all_targets
+# Requires for each suite: my_compat_dist_$(suite) to be defined.
+define create-suite-dependencies
+$(foreach suite, $(LOCAL_COMPATIBILITY_SUITE), \
+  $(eval my_compat_files_$(suite) := $(call copy-many-files, $(my_compat_dist_$(suite)))) \
+  $(eval COMPATIBILITY.$(suite).FILES := \
+    $(COMPATIBILITY.$(suite).FILES) $(my_compat_files_$(suite))) \
+  $(eval $(my_register_name) : $(my_compat_files_$(suite))))
+endef
+
+###########################################################
 ## Other includes
 ###########################################################
 
diff --git a/core/envsetup.mk b/core/envsetup.mk
index 6cfb6a1..4e06687 100644
--- a/core/envsetup.mk
+++ b/core/envsetup.mk
@@ -259,6 +259,9 @@
 
 HOST_CROSS_OUT_EXECUTABLES := $(HOST_CROSS_OUT)/bin
 HOST_CROSS_OUT_SHARED_LIBRARIES := $(HOST_CROSS_OUT)/lib
+HOST_CROSS_OUT_NATIVE_TESTS := $(HOST_CROSS_OUT)/nativetest
+HOST_CROSS_OUT_COVERAGE := $(HOST_CROSS_OUT)/coverage
+HOST_OUT_TESTCASES := $(HOST_OUT)/testcases
 
 HOST_OUT_INTERMEDIATES := $(HOST_OUT)/obj
 HOST_OUT_HEADERS := $(HOST_OUT_INTERMEDIATES)/include
@@ -285,6 +288,8 @@
 $(HOST_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES := $(HOST_OUT)/lib
 $(HOST_2ND_ARCH_VAR_PREFIX)HOST_OUT_EXECUTABLES := $(HOST_OUT_EXECUTABLES)
 $(HOST_2ND_ARCH_VAR_PREFIX)HOST_OUT_JAVA_LIBRARIES := $(HOST_OUT_JAVA_LIBRARIES)
+$(HOST_2ND_ARCH_VAR_PREFIX)HOST_OUT_NATIVE_TESTS := $(HOST_OUT)/nativetest
+$(HOST_2ND_ARCH_VAR_PREFIX)HOST_OUT_TESTCASES := $(HOST_OUT_TESTCASES)
 
 # The default host library path.
 # It always points to the path where we build libraries in the default bitness.
@@ -335,6 +340,7 @@
 TARGET_OUT_ETC := $(TARGET_OUT)/etc
 TARGET_OUT_NOTICE_FILES := $(TARGET_OUT_INTERMEDIATES)/NOTICE_FILES
 TARGET_OUT_FAKE := $(PRODUCT_OUT)/fake_packages
+TARGET_OUT_TESTCASES := $(PRODUCT_OUT)/testcases
 
 TARGET_OUT_SYSTEM_OTHER := $(PRODUCT_OUT)/$(TARGET_COPY_OUT_SYSTEM_OTHER)
 
@@ -348,6 +354,7 @@
 $(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_EXECUTABLES := $(TARGET_OUT_EXECUTABLES)
 $(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_APPS := $(TARGET_OUT_APPS)
 $(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_APPS_PRIVILEGED := $(TARGET_OUT_APPS_PRIVILEGED)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_TESTCASES := $(TARGET_OUT_TESTCASES)
 
 TARGET_OUT_DATA := $(PRODUCT_OUT)/$(TARGET_COPY_OUT_DATA)
 TARGET_OUT_DATA_EXECUTABLES := $(TARGET_OUT_EXECUTABLES)
diff --git a/core/main.mk b/core/main.mk
index a612f83..5a054a0 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -135,6 +135,8 @@
 -include cts/build/config.mk
 # VTS-specific config.
 -include test/vts/tools/vts-tradefed/build/config.mk
+# STS-specific config.
+-include test/sts/tools/sts-tradefed/build/config.mk
 
 # This allows us to force a clean build - included after the config.mk
 # environment setup is done, but before we generate any dependencies.  This
diff --git a/core/package_internal.mk b/core/package_internal.mk
index 551f18e..78cc735 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -636,15 +636,14 @@
 $(my_register_name): $(installed_apk_splits)
 
 ifdef LOCAL_COMPATIBILITY_SUITE
-cts_testcase_file := $(foreach s,$(my_split_suffixes),$(COMPATIBILITY_TESTCASES_OUT_$(LOCAL_COMPATIBILITY_SUITE))/$(LOCAL_MODULE)_$(s).apk)
-$(cts_testcase_file) : $(COMPATIBILITY_TESTCASES_OUT_$(LOCAL_COMPATIBILITY_SUITE))/$(LOCAL_MODULE)_%.apk : $(built_module_path)/package_%.apk | $(ACP)
-	$(copy-file-to-new-target)
 
-COMPATIBILITY.$(LOCAL_COMPATIBILITY_SUITE).FILES := \
-  $(COMPATIBILITY.$(LOCAL_COMPATIBILITY_SUITE).FILES) \
-  $(cts_testcase_file)
+$(foreach suite, $(LOCAL_COMPATIBILITY_SUITE), \
+  $(eval my_compat_dist_$(suite) := $(foreach dir, $(call compatibility_suite_dirs,$(suite)), \
+    $(foreach s,$(my_split_suffixes),\
+      $(built_module_path)/package_$(s).apk:$(dir)/$(LOCAL_MODULE)_$(s).apk))))
 
-$(my_register_name) : $(cts_testcase_file)
+$(call create-suite-dependencies)
+
 endif # LOCAL_COMPATIBILITY_SUITE
 endif # LOCAL_PACKAGE_SPLITS
 
diff --git a/core/tasks/sts.mk b/core/tasks/sts.mk
new file mode 100644
index 0000000..b3c3baa
--- /dev/null
+++ b/core/tasks/sts.mk
@@ -0,0 +1,23 @@
+# Copyright (C) 2016 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+test_suite_name := sts
+test_suite_tradefed := sts-tradefed
+test_suite_readme := test/sts/README.md
+
+include $(BUILD_SYSTEM)/tasks/tools/compatibility.mk
+
+.PHONY: sts
+sts: $(compatibility_zip)
+$(call dist-for-goals, sts, $(compatibility_zip))
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 2258b4f..0bac528 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -114,7 +114,7 @@
     #  It must be of the form "YYYY-MM-DD" on production devices.
     #  It must match one of the Android Security Patch Level strings of the Public Security Bulletins.
     #  If there is no $PLATFORM_SECURITY_PATCH set, keep it empty.
-    PLATFORM_SECURITY_PATCH := 2017-11-01
+    PLATFORM_SECURITY_PATCH := 2018-03-01
 endif
 
 ifeq "" "$(PLATFORM_BASE_OS)"