diff --git a/test/opt/CMakeLists.txt b/test/opt/CMakeLists.txt
index 56414ae..1e32df3 100644
--- a/test/opt/CMakeLists.txt
+++ b/test/opt/CMakeLists.txt
@@ -92,4 +92,5 @@
 add_spvtools_unittest(TARGET upgrade_memory_model
   SRCS upgrade_memory_model_test.cpp pass_utils.cpp
   LIBS SPIRV-Tools-opt
+  PCH_FILE pch_test_opt
 )