diff --git a/gnu/packages/bioconductor.scm b/gnu/packages/bioconductor.scm
index ff1d90f049..309a32ef07 100644
--- a/gnu/packages/bioconductor.scm
+++ b/gnu/packages/bioconductor.scm
@@ -25212,7 +25212,7 @@ (define-public r-biocdockermanager
            r-memoise
            r-readr
            r-whisker))
-    (native-inputs (list r-knitr))
+    (native-inputs (list r-knitr r-testthat))
     (home-page "https://bioconductor.org/packages/BiocDockerManager")
     (synopsis "Access and manage Bioconductor Docker images")
     (description