diff --git a/gnu/packages/bioconductor.scm b/gnu/packages/bioconductor.scm
index f495e74f739..7ffd72bacc6 100644
--- a/gnu/packages/bioconductor.scm
+++ b/gnu/packages/bioconductor.scm
@@ -21267,7 +21267,7 @@ rate} (FDR).")
            r-iranges
            r-s4vectors))
     (native-inputs
-     (list r-knitr))
+     (list r-knitr r-testthat))
     (home-page "https://cran.r-project.org/web/packages/ActiveDriverWGS/")
     (synopsis "Driver discovery tool for cancer whole genomes")
     (description