--- CMakeLists.txt
+++ CMakeLists.txt
@@ -211,10 +211,12 @@ add_library(s2
             src/s2/util/math/exactfloat/exactfloat.cc
             src/s2/util/math/mathutil.cc
             src/s2/util/units/length-units.cc)
-add_library(s2testing STATIC
-            src/s2/s2builderutil_testing.cc
-            src/s2/s2shapeutil_testing.cc
-            src/s2/s2testing.cc)
+
+#add_library(s2testing STATIC
+#        src/s2/s2builderutil_testing.cc
+#        src/s2/s2shapeutil_testing.cc
+#        src/s2/s2testing.cc)
+
 target_link_libraries(
     s2
     ${GFLAGS_LIBRARIES} ${GLOG_LIBRARIES} ${OPENSSL_LIBRARIES}
@@ -425,7 +427,7 @@ install(FILES src/s2/util/math/mathutil.h
 install(FILES src/s2/util/units/length-units.h
               src/s2/util/units/physical-units.h
         DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/s2/util/units")
-install(TARGETS s2 s2testing
+install(TARGETS s2
         RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
         ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
         LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}")