diff --git a/changelog.d/2478.misc.2.rst b/changelog.d/2478.misc.2.rst
new file mode 100644
index 0000000000..27c07b1152
--- /dev/null
+++ b/changelog.d/2478.misc.2.rst
@@ -0,0 +1,2 @@
+Fix tests with pip 20.3+
+-- by :user:`yan12125`
diff --git a/setuptools/tests/test_virtualenv.py b/setuptools/tests/test_virtualenv.py
index c8ed9e57ea..e7b100fba4 100644
--- a/setuptools/tests/test_virtualenv.py
+++ b/setuptools/tests/test_virtualenv.py
@@ -2,6 +2,8 @@
 import os
 import sys
 
+import pathlib
+
 import pytest
 from pytest import yield_fixture
 from pytest_fixture_config import yield_requires_config
@@ -124,7 +126,7 @@ def sdist(distname, version):
         make_nspkg_sdist(str(dist_path), distname, version)
         return dist_path
     dependency_links = [
-        str(dist_path)
+        pathlib.Path(str(dist_path)).as_uri()
         for dist_path in (
             sdist('foobar', '2.4'),
             sdist('bits', '4.2'),