diff --git a/CEP/LMWCommon/test/CMakeLists.txt b/CEP/LMWCommon/test/CMakeLists.txt
index 2fb18c6adea5a40d1dee8c9ffbde1a687a3273e6..1a4c98e1aa8db73727f0175d7990cf4d34cbf84b 100644
--- a/CEP/LMWCommon/test/CMakeLists.txt
+++ b/CEP/LMWCommon/test/CMakeLists.txt
@@ -12,3 +12,9 @@ lofar_add_test(tSocketConnectionSet tSocketConnectionSet.cc)
 lofar_add_test(tfinddproc DEPENDS finddproc)
 lofar_add_test(tstartdproc tstartdproc.cc)
 lofar_add_test(trundist)
+
+# The SocketConnection tests must be run serially
+set_tests_properties(
+  tSocketConnection
+  tSocketConnectionSet
+  PROPERTIES RUN_SERIAL ON)
\ No newline at end of file