diff --git a/core/thread/test/CMakeLists.txt b/core/thread/test/CMakeLists.txt
index 023115a842c3682c737546073b5fd0dc7c0b4ddf..c135132d2a91e58547ad954ff573c059391f9a31 100644
--- a/core/thread/test/CMakeLists.txt
+++ b/core/thread/test/CMakeLists.txt
@@ -12,4 +12,4 @@ endif()
 
 ROOT_ADD_GTEST(testTThreadedObject testTThreadedObject.cxx LIBRARIES Hist)
 
-ROOT_ADD_GTEST(testInterpreterLock testInterpreterLock.cxx LIBRARIES Imt REPEATS 100)
+ROOT_ADD_GTEST(testInterpreterLock testInterpreterLock.cxx LIBRARIES Imt REPEATS 50)