diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0f9fa0c..90dc083 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,6 +35,9 @@ add_compile_options(-Werror)
 
 include_directories(.)
 
+# Set the "krnlmon" label on all tests in this directory.
+set_property(DIRECTORY PROPERTY LABELS krnlmon)
+
 if(BUILD_TESTING)
   include(cmake/testing.cmake)
 endif()