diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 80030aa..9431065 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -44,7 +44,7 @@ foreach(testSrc ${TEST_SRCS})
         add_executable(${testName} ${testSrc})
 
         #link to Boost libraries AND your targets and dependencies
-        target_link_libraries(${testName} ${Boost_LIBRARIES} epanet2 epanet-output)
+        target_link_libraries(${testName} ${Boost_LIBRARIES} pthread epanet2 epanet-output)
 
         #Finally add it to test execution
         #Notice the WORKING_DIRECTORY and COMMAND