diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6d014dffa968c1b2dc7d43f541d475b579bb0a1f..09496f49eaf13ab8adce757b6ea3913ac9bca2f4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -68,7 +68,7 @@ endif()
 #add_custom_command (TARGET corsika_pre_build PRE_BUILD COMMAND "${PROJECT_SOURCE_DIR}/pre_compile.py")
 
 # add call to ./do-copyright.py to run as unit-test-case
-add_test (NAME copyright_notices COMMAND "./do-copyright.py" WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
+add_test (NAME copyright_notices COMMAND ./do-copyright.py WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
 
 # add call to do-clang-format.sh checking to run as unit-test-case
 add_test (NAME clang_format COMMAND ./do-clang-format.sh check WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})