Index: tests/src/Mod/Material/CMakeLists.txt
--- tests/src/Mod/Material/CMakeLists.txt.orig
+++ tests/src/Mod/Material/CMakeLists.txt
@@ -6,7 +6,13 @@ target_include_directories(Material_tests_run PUBLIC
     ${XercesC_INCLUDE_DIRS}
 )
 
+target_link_directories(Material_tests_run PUBLIC
+    "/usr/X11R6/lib"
+    "/usr/local/lib"
+)
+
 target_link_libraries(Material_tests_run
+    gtest
     gtest_main
     ${Google_Tests_LIBS}
     Materials
