diff --git a/tests/run_unitTests.R b/tests/run_unitTests.R
index f6cf4ff..b51801a 100644
--- a/tests/run_unitTests.R
+++ b/tests/run_unitTests.R
@@ -1,2 +1,3 @@
 require("GenomeInfoDb") || stop("unable to load GenomeInfoDb package")
+require("RUnit") || stop("unable to load RUnit package")
 GenomeInfoDb:::.test()