diff --git a/FairMQTest.cmake b/FairMQTest.cmake
index c1a2d058..1e479687 100644
--- a/FairMQTest.cmake
+++ b/FairMQTest.cmake
@@ -29,6 +29,7 @@ Set(configure_options "${configure_options};-DCMAKE_PREFIX_PATH=$ENV{SIMPATH}")
 Set(configure_options "${configure_options};-DBUILD_NANOMSG_TRANSPORT=ON")
 Set(configure_options "${configure_options};-DBUILD_DDS_PLUGIN=ON")
 Set(configure_options "${configure_options};-DFAST_BUILD=ON")
+Set(configure_options "${configure_options};-DCOTIRE_MAXIMUM_NUMBER_OF_UNITY_INCLUDES=-j$ENV{number_of_processors}")
 
 Set(EXTRA_FLAGS $ENV{EXTRA_FLAGS})
 If(EXTRA_FLAGS)