diff --git a/lldb/test/functionalities/thread/break_after_join/Makefile b/lldb/test/functionalities/thread/break_after_join/Makefile
index 26db4816b6ea..67aa16625bff 100644
--- a/lldb/test/functionalities/thread/break_after_join/Makefile
+++ b/lldb/test/functionalities/thread/break_after_join/Makefile
@@ -1,4 +1,5 @@
 LEVEL = ../../../make
 
 CXX_SOURCES := main.cpp
+ENABLE_THREADS := YES
 include $(LEVEL)/Makefile.rules
diff --git a/lldb/test/functionalities/thread/create_during_step/Makefile b/lldb/test/functionalities/thread/create_during_step/Makefile
index 26db4816b6ea..67aa16625bff 100644
--- a/lldb/test/functionalities/thread/create_during_step/Makefile
+++ b/lldb/test/functionalities/thread/create_during_step/Makefile
@@ -1,4 +1,5 @@
 LEVEL = ../../../make
 
 CXX_SOURCES := main.cpp
+ENABLE_THREADS := YES
 include $(LEVEL)/Makefile.rules
diff --git a/lldb/test/functionalities/thread/exit_during_break/Makefile b/lldb/test/functionalities/thread/exit_during_break/Makefile
index 26db4816b6ea..67aa16625bff 100644
--- a/lldb/test/functionalities/thread/exit_during_break/Makefile
+++ b/lldb/test/functionalities/thread/exit_during_break/Makefile
@@ -1,4 +1,5 @@
 LEVEL = ../../../make
 
 CXX_SOURCES := main.cpp
+ENABLE_THREADS := YES
 include $(LEVEL)/Makefile.rules
diff --git a/lldb/test/functionalities/thread/multi_break/Makefile b/lldb/test/functionalities/thread/multi_break/Makefile
index 26db4816b6ea..67aa16625bff 100644
--- a/lldb/test/functionalities/thread/multi_break/Makefile
+++ b/lldb/test/functionalities/thread/multi_break/Makefile
@@ -1,4 +1,5 @@
 LEVEL = ../../../make
 
 CXX_SOURCES := main.cpp
+ENABLE_THREADS := YES
 include $(LEVEL)/Makefile.rules