diff --git a/src/mlpack/tests/CMakeLists.txt b/src/mlpack/tests/CMakeLists.txt
index de0f56d8df..9761cd6df1 100644
--- a/src/mlpack/tests/CMakeLists.txt
+++ b/src/mlpack/tests/CMakeLists.txt
@@ -1,3 +1,5 @@
+include(CTest)
+
 # mlpack test executable.
 add_executable(mlpack_test
   activation_functions_test.cpp