diff --git a/gnu/packages/bioinformatics.scm b/gnu/packages/bioinformatics.scm
index de6186de27..bdcb5a4010 100644
--- a/gnu/packages/bioinformatics.scm
+++ b/gnu/packages/bioinformatics.scm
@@ -499,6 +499,9 @@ (define-public ribodiff
        ("python-matplotlib" ,python2-matplotlib)
        ("python-scipy" ,python2-scipy)
        ("python-statsmodels" ,python2-statsmodels)))
+    (native-inputs
+     `(("python-mock" ,python2-mock)
+       ("python-nose" ,python2-nose)))
     (home-page "http://public.bmi.inf.ethz.ch/user/zhongy/RiboDiff/")
     (synopsis "Detect translation efficiency changes from ribosome footprints")
     (description "RiboDiff is a statistical tool that detects the protein