diff --git a/tests/config/CMakeLists.txt b/tests/config/CMakeLists.txt
index 04fa52f..07a1c09 100644
--- a/tests/config/CMakeLists.txt
+++ b/tests/config/CMakeLists.txt
@@ -41,6 +41,7 @@ add_executable(${RUNTIME_CONFIG_TEST_APP_NAME}
     ${SOURCE_DIR}/config/defaults.c
     ${SOURCE_DIR}/config/loader.c
     ${SOURCE_DIR}/config/runtime_config.c
+    ${SOURCE_DIR}/core/layer.c
     ${SOURCE_DIR}/core/layout.c
     ${SOURCE_DIR}/core/runtime.c
     ${SOURCE_DIR}/core/state.c
diff --git a/tests/core/CMakeLists.txt b/tests/core/CMakeLists.txt
index 1f16a73..4c46dcd 100644
--- a/tests/core/CMakeLists.txt
+++ b/tests/core/CMakeLists.txt
@@ -9,6 +9,7 @@ add_executable(${TEST_APP_NAME}
     ${SOURCE_DIR}/config/runtime_config.c
     ${SOURCE_DIR}/backend/x11/backend.c
     ${SOURCE_DIR}/backend/x11/event.c
+    ${SOURCE_DIR}/core/layer.c
     ${SOURCE_DIR}/core/layout.c
     ${SOURCE_DIR}/core/runtime.c
     ${SOURCE_DIR}/core/state.c