diff --git a/tests/integration/test_install_twists.py b/tests/integration/test_install_twists.py
index <HASH>..<HASH> 100644
--- a/tests/integration/test_install_twists.py
+++ b/tests/integration/test_install_twists.py
@@ -92,7 +92,8 @@ setup(
         assert "version" in pipenv_instance.lockfile["default"]["test-private-dependency"]
         assert "0.1" in pipenv_instance.lockfile["default"]["test-private-dependency"]["version"]
 
-    with PipenvInstance(pypi=pypi, chdir=True) as p:
+    with temp_environ(), PipenvInstance(pypi=pypi, chdir=True) as p:
+        os.environ['PIP_PROCESS_DEPENDENCY_LINKS'] = '1'
         test_deplink(p, 'git+https://github.com/atzannes/test-private-dependency@v0.1#egg=test-private-dependency-v0.1')
 
     # with PipenvInstance(pypi=pypi, chdir=True) as p:
Enable dependency link processing

- Use `PIP_PROCESS_DEPENDENCY_LINKS` to toggle the processing of dependency links