diff --git a/tests/cpan.scm b/tests/cpan.scm
index 80ff044abd..e37fc437fc 100644
--- a/tests/cpan.scm
+++ b/tests/cpan.scm
@@ -61,7 +61,9 @@
 (test-assert "cpan->guix-package"
   ;; Replace network resources with sample data.
   (mock ((guix build download) url-fetch
-         (lambda* (url file-name #:key (mirrors '()))
+         (lambda* (url file-name
+                       #:key
+                       (mirrors '()) verify-certificate?)
            (with-output-to-file file-name
              (lambda ()
                (display
diff --git a/tests/cran.scm b/tests/cran.scm
index 896c5af06c..f92934c468 100644
--- a/tests/cran.scm
+++ b/tests/cran.scm
@@ -89,7 +89,9 @@ Date/Publication: 2015-07-14 14:15:16
 (test-assert "description->package"
   ;; Replace network resources with sample data.
   (mock ((guix build download) url-fetch
-         (lambda* (url file-name #:key (mirrors '()))
+         (lambda* (url file-name
+                       #:key
+                       (mirrors '()) verify-certificate?)
            (with-output-to-file file-name
              (lambda ()
                (display