diff --git a/tests/media/CMakeLists.txt b/tests/media/CMakeLists.txt
index d95625a2d5ecb30fd33fe2e80f9f2e1fb62e46b8..ead30414ca61b6912d185c9bc5854a53113c3aa3 100644
--- a/tests/media/CMakeLists.txt
+++ b/tests/media/CMakeLists.txt
@@ -3,6 +3,7 @@ set (test_media_sources
   testMedium.cpp
   testEnvironment.cpp
   testRefractiveIndex.cpp
+  testShowerAxis.cpp
   )
 
 CORSIKA_ADD_TEST (testMedia SOURCES ${test_media_sources})