diff --git a/CMakeLists.txt b/CMakeLists.txt
index bc99ce3..d887a7e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -481,9 +481,6 @@ add_library(folly_test_util
   ${FOLLY_DIR}/test/DeterministicSchedule.cpp
   ${FOLLY_DIR}/json/JsonTestUtil.cpp
 )
-target_compile_definitions(folly_test_util PUBLIC
-  FOLLY_CERTS_DIR="${FOLLY_DIR}/io/async/test/certs"
-)
 set_property(TARGET folly_test_util PROPERTY VERSION ${PACKAGE_VERSION})
 target_link_libraries(folly_test_util
   PUBLIC