Gtest errors when compiling workspace

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For some time now (due to some update, probably), I have problems with GTest when compiling a workspace.

When installing GTest on the system, libgtest.so and libgtest_main.so are created, and cmake finds them. They are static or dynamic depending on how it is installed. Everithing is OK (I suppose)

When compiling a workspace, I always have the same error:

-- Using empy: /usr/bin/empy

-- Using CATKIN_ENABLE_TESTING: ON
-- Call enable_testing()
-- Using CATKIN_TEST_RESULTS_DIR: /home/paco/ros_ws/tests_ws/build/test_results
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE  
-- Found gtest: gtests will be built 
CMake Error at /opt/ros/kinetic/share/catkin/cmake/test/gtest.cmake:372 (add_library):   add_library cannot create imported target "gtest" because another target   with the same name already exists. Call Stack (most recent call first):   /opt/ros/kinetic/share/catkin/cmake/all.cmake:147 (include)   /opt/ros/kinetic/share/catkin/cmake/catkinConfig.cmake:20 (include)   CMakeLists.txt:52 (find_package)

CMake Error at /opt/ros/kinetic/share/catkin/cmake/test/gtest.cmake:374 (add_library):   add_library cannot create imported target "gtest_main" because another   target with the same name already exists. Call Stack (most recent call first):   /opt/ros/kinetic/share/catkin/cmake/all.cmake:147 (include)   /opt/ros/kinetic/share/catkin/cmake/catkinConfig.cmake:20 (include)   CMakeLists.txt:52 (find_package)

-- Using Python nosetests: /usr/bin/nosetests-2.7
-- catkin 0.7.11

This is caused because in /opt/ros/kinetic/share/catkin/cmake/test/gtest.cmake:363, libgtest.so is required to be built, even if it exists in the system, producing that error.

Is there something I'm doing wrong, or is it misconfigured in my system?