diff --git a/tests/pypi.scm b/tests/pypi.scm
index 1f7ac2500a..f26e7fea13 100644
--- a/tests/pypi.scm
+++ b/tests/pypi.scm
@@ -148,10 +148,6 @@ baz > 13.37")
   (mock ((guix import utils) url-fetch
          (lambda (url file-name)
            (match url
-             ("https://pypi.python.org/pypi/foo/json"
-              (with-output-to-file file-name
-                (lambda ()
-                  (display test-json))))
              ("https://example.com/foo-1.0.0.tar.gz"
                (begin
                  (mkdir "foo-1.0.0")
@@ -175,31 +171,39 @@ baz > 13.37")
                    (rename-file zip-file file-name))
                  (delete-file-recursively "foo-1.0.0.dist-info")))
              (_ (error "Unexpected URL: " url)))))
-    (match (pypi->guix-package "foo")
-      (('package
-         ('name "python-foo")
-         ('version "1.0.0")
-         ('source ('origin
-                    ('method 'url-fetch)
-                    ('uri (string-append "https://example.com/foo-"
-                                         version ".tar.gz"))
-                    ('sha256
-                     ('base32
-                      (? string? hash)))))
-         ('build-system 'python-build-system)
-         ('propagated-inputs
-          ('quasiquote
-           (("python-bar" ('unquote 'python-bar))
-            ("python-baz" ('unquote 'python-baz))
-            ("python-setuptools" ('unquote 'python-setuptools)))))
-         ('home-page "http://example.com")
-         ('synopsis "summary")
-         ('description "summary")
-         ('license 'license:lgpl2.0))
-       (string=? (bytevector->nix-base32-string
-                  test-source-hash)
-                 hash))
-      (x
-       (pk 'fail x #f)))))
+        (mock ((guix http-client) http-fetch
+               (lambda (url)
+                 (match url
+                   ("https://pypi.python.org/pypi/foo/json"
+                    (values (open-input-string test-json)
+                            (string-length test-json)))
+                   ("https://example.com/foo-1.0.0-py2.py3-none-any.whl" #f)
+                   (_ (error "Unexpected URL: " url)))))
+              (match (pypi->guix-package "foo")
+                (('package
+                   ('name "python-foo")
+                   ('version "1.0.0")
+                   ('source ('origin
+                              ('method 'url-fetch)
+                              ('uri (string-append "https://example.com/foo-"
+                                                   version ".tar.gz"))
+                              ('sha256
+                               ('base32
+                                (? string? hash)))))
+                   ('build-system 'python-build-system)
+                   ('propagated-inputs
+                    ('quasiquote
+                     (("python-bar" ('unquote 'python-bar))
+                      ("python-baz" ('unquote 'python-baz))
+                      ("python-setuptools" ('unquote 'python-setuptools)))))
+                   ('home-page "http://example.com")
+                   ('synopsis "summary")
+                   ('description "summary")
+                   ('license 'license:lgpl2.0))
+                 (string=? (bytevector->nix-base32-string
+                            test-source-hash)
+                           hash))
+                (x
+                 (pk 'fail x #f))))))
 
 (test-end "pypi")