diff --git a/CMakeLists.txt b/CMakeLists.txt
index be403839..c669aa0c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -134,7 +134,7 @@ if(ENABLE_TESTING)
                       LIBDISPATCH_OVERLAY_DIR=${XCTEST_PATH_TO_LIBDISPATCH_BUILD}/src/swift
                       SWIFT_EXEC=${CMAKE_Swift_COMPILER}
                       SWIFT_FLAGS=${CMAKE_Swift_FLAGS_ESCAPED}
-                      $<TARGET_FILE:Python3::Interpreter> ${LIT_COMMAND} -sv ${CMAKE_SOURCE_DIR}/Tests/Functional
+                      $<TARGET_FILE:Python3::Interpreter> -mtrace -t ${LIT_COMMAND} -a ${CMAKE_SOURCE_DIR}/Tests/Functional
                     COMMENT
                       "Running XCTest functional test suite"
                     DEPENDS