CMake: setting an environmental variable for ctest

I want ctest to show me the failed tests output by default. That is, I want to run:

$ make all test

and see any output of failed tests without having to cat Testing/Temporary/LastTest.log.

It appears that there are two ways of doing this:

(1) Setting the CTEST_OUTPUT_ON_FAILURE environmental variable:

 $ CTEST_OUTPUT_ON_FAILURE=1 make all test
 $ # or CTEST_OUTPUT_ON_FAILURE=1 ctest

(2) Specifying the --output-on-failure flag to the ctest invocation:

 $ ctest --output-on-failure

Is there a way to write a CMakeLists.txt file such that ctests dumps failed tests output by default on a normal "make all test" invocation WITHOUT resorting to exporting the environmental variable globally in the session or resorting to a custom target like make check (as described here)?

I am aware of the SET_TESTS_PROPERTIES() command, but trying it out like this:

CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
PROJECT(testenv CXX)
ENABLE_TESTING()
ADD_EXECUTABLE(hello hello.cpp)
ADD_TEST(testhello hello)

# Following sets the environment variable for the shell in which the test
# progoram 'hello' is run, but not the shell in which ctest is run
SET_TESTS_PROPERTIES(testhello
    PROPERTIES ENVIRONMENT "CTEST_OUTPUT_ON_FAILURE=1")

and experimenting shows that the environmental variable is set in the shell that the test program is executed in, but not in the shell that ctest is executed in.

The built-in test target cannot be modified, but you can add a custom check target which invokes ctest with the --output-on-failure switch in the following way:

if (CMAKE_CONFIGURATION_TYPES)
    add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} 
        --force-new-ctest-process --output-on-failure 
        --build-config "$<CONFIGURATION>")
else()
    add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} 
        --force-new-ctest-process --output-on-failure)
endif()

The custom target has to be set up differently for single build type and multi-configuration builds. In the latter case, the active build configuration has to be passed on to the ctest invocation using the --build-config flag. The --force-new-ctest-process is used by the built-in test target by default.