--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -55,10 +55,7 @@ set(LIT_ARGS -s CACHE STRING "Arguments to pass to lit")
 # the location of GTest source code is probably error prone so using a copy in the 
 # repository seems like the easiest thing to do. This also has the added benefit that
 # everyone uses the same version of GTest.
-set(GTEST_PREFIX ${PROJECT_SOURCE_DIR}/deps/gtest)
-if (NOT EXISTS "${GTEST_PREFIX}/CMakeLists.txt")
-    message(FATAL_ERROR "Could not find GTest. Did you run scripts/deps/setup-gtest.sh?")
-endif()
+find_package(GTest REQUIRED)
 
 if (MSVC)
   # STP is built with the shared version of the CRT, gtest defaults to the
@@ -68,11 +65,8 @@ endif()
 
 set(PREV_CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-format-nonliteral -Wno-missing-field-initializers")
-add_subdirectory(${GTEST_PREFIX} gtest)
 set(CMAKE_CXX_FLAGS "${PREV_CMAKE_CXX_FLAGS}")
-set(GTEST_BOTH_LIBRARIES gtest gtest_main)
 
-include_directories(${GTEST_PREFIX}/include)
 
 # Add handy macros/functions
 include(AddSTPGTest)