diff --git a/Modules/DiffusionImaging/Testing/files.cmake b/Modules/DiffusionImaging/Testing/files.cmake
index 545e2e6ab2..d4797a0809 100644
--- a/Modules/DiffusionImaging/Testing/files.cmake
+++ b/Modules/DiffusionImaging/Testing/files.cmake
@@ -1,8 +1,8 @@
 SET(MODULE_TESTS
   mitkFactoryRegistrationTest.cpp
 )
 
 SET(MODULE_CUSTOM_TESTS
   mitkFiberBundleXReaderWriterTest.cpp
-  mitkFiberBundleXTest.cpp
+  # mitkFiberBundleXTest.cpp ## deactivated, see bug 12017
 )