diff --git a/doc/building.dox b/doc/building.dox
index 9cd612080..0c36a6ca9 100644
--- a/doc/building.dox
+++ b/doc/building.dox
@@ -816,6 +816,12 @@ ctest -R GLTest # run only tests requiring OpenGL context
 Tests requiring Vulkan to work are also disabled by default, enable them with
 `MAGNUM_BUILD_VK_TESTS`.
 
+By default the tests are compiled as part of the implicit `ALL` target. Use the
+`CORRADE_TESTSUITE_TEST_TARGET` CMake variable to create a dedicated target for
+building just the tests. See the documentation of the
+@ref corrade-cmake-add-test "corrade_add_test()" CMake macro for more
+information.
+
 @section building-doc Building documentation
 
 The documentation is generated using [Doxygen](http://doxygen.org) with the