diff --git a/lldb/test/Makefile b/lldb/test/Makefile
index 0083efd1794b..dea699231167 100644
--- a/lldb/test/Makefile
+++ b/lldb/test/Makefile
@@ -32,5 +32,5 @@ check-local::
 	rm -rf ../test-rdir
 	env PATH="$(ToolDir):$(PATH)" \
 	    PYTHONPATH=$(ToolDir) \
-	    $(SHLIBPATH_VAR)=$(LibDir) \
+	    $(SHLIBPATH_VAR)=$(LibDir):$($(SHLIBPATH_VAR)) \
 	     python $(PROJ_SRC_DIR)/dotest.py -i -v -r ../test-rdir