--- a/src/tests/class_tests/openms/CMakeLists.orig.txt	2015-04-09 17:57:04.000000000 +0200
+++ b/src/tests/class_tests/openms/CMakeLists.txt	2015-04-14 11:12:48.620239096 +0200
@@ -65,7 +65,7 @@
 # disable optimization for tests for gcc like compilers
 if (CMAKE_COMPILER_IS_INTELCXX OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANG)
   set(_TMP_CMAKE_CXX_FLAGS_RELEASE ${CMAKE_CXX_FLAGS_RELEASE})
-  set(CMAKE_CXX_FLAGS_RELEASE "-O0")
+  set(CMAKE_CXX_FLAGS_RELEASE " ")
 endif()
 
 #------------------------------------------------------------------------------