diff --git a/compiler-rt/lib/tsan/tests/CMakeLists.txt b/compiler-rt/lib/tsan/tests/CMakeLists.txt
--- a/compiler-rt/lib/tsan/tests/CMakeLists.txt
+++ b/compiler-rt/lib/tsan/tests/CMakeLists.txt
@@ -14,6 +14,12 @@
   -fno-rtti
 )
 
+if(COMPILER_RT_TSAN_DEBUG_OUTPUT)
+  # Need to match these flags with the runtime.
+  list(APPEND TSAN_UNITTEST_CFLAGS -DTSAN_COLLECT_STATS=1
+                                   -DTSAN_DEBUG_OUTPUT=2)
+endif()
+
 set(TSAN_TEST_ARCH ${TSAN_SUPPORTED_ARCH})
 
 set(LINK_FLAGS ${COMPILER_RT_UNITTEST_LINK_FLAGS})