diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -29,6 +29,7 @@ add_executable(Test EXCLUDE_FROM_ALL
   ../src/source.cpp
   ../src/indexbuffer.cpp
   ../src/linindexbuffer.cpp
+  ../src/ringbuffer.cpp
   )
 add_test(NAME test1 COMMAND Test)
 qt5_use_modules(Test Widgets)