diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 97640e948..bc7edcef6 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,3 +1,5 @@
+include (CTest)
+
 target_sources(p4est PRIVATE p4est_base.c p4est_connectivity.c p4est.c p4est_bits.c p4est_search.c p4est_build.c
 p4est_algorithms.c p4est_communication.c p4est_ghost.c p4est_nodes.c p4est_points.c p4est_geometry.c p4est_iterate.c
 p4est_lnodes.c p4est_mesh.c p4est_balance.c p4est_io.c p4est_connrefine.c
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index fc43a0c4c..88bf6a452 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,3 +1,5 @@
+include(CTest)
+
 if(P4EST_HAVE_STDLIB_H)
   check_symbol_exists(random stdlib.h P4EST_HAVE_RANDOM)
   check_symbol_exists(srandom stdlib.h P4EST_HAVE_SRANDOM)