diff --git a/core/java.mk b/core/java.mk
index 8863ac2..79be181 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -378,7 +378,7 @@
 
 # Run proguard if necessary, otherwise just copy the file.
 ifdef LOCAL_PROGUARD_ENABLED
-ifneq ($(filter-out full custom nosystem obfuscation optimization,$(LOCAL_PROGUARD_ENABLED)),)
+ifneq ($(filter-out full custom nosystem obfuscation optimization shrinktests,$(LOCAL_PROGUARD_ENABLED)),)
     $(warning while processing: $(LOCAL_MODULE))
     $(error invalid value for LOCAL_PROGUARD_ENABLED: $(LOCAL_PROGUARD_ENABLED))
 endif
@@ -395,6 +395,9 @@
 # If this is a test package, add proguard keep flags for tests.
 ifneq ($(LOCAL_INSTRUMENTATION_FOR)$(filter tests,$(LOCAL_MODULE_TAGS)),)
 proguard_flags += -include $(BUILD_SYSTEM)/proguard_tests.flags
+ifeq ($(filter shrinktests,$(LOCAL_PROGUARD_ENABLED)),)
+proguard_flags += -dontshrink # don't shrink tests by default
+endif # shrinktests
 endif # test package
 ifeq ($(filter obfuscation,$(LOCAL_PROGUARD_ENABLED)),)
 # By default no obfuscation
diff --git a/core/proguard_tests.flags b/core/proguard_tests.flags
index 4481a1b..1f840bc 100644
--- a/core/proguard_tests.flags
+++ b/core/proguard_tests.flags
@@ -1,5 +1,6 @@
 # Keep everything for tests
--dontshrink
+# This flag has been moved to the makefiles and is set for tests by default.
+#-dontshrink
 
 # But we may want to obfuscate if the main app gets obfuscated.
 # This flag has been moved to the makefiles.