diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index 7d70b80e0e..b1d57a0215 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -731,6 +731,7 @@ (define-public python-fit-nbinom
     (build-system pyproject-build-system)
     (arguments
      (list
+      #:tests? #false ;there are none
       #:phases
       '(modify-phases %standard-phases
          (add-after 'unpack 'remove-invalid-syntax